Data processing method, device, apparatus and medium

Abstract

This application relates to the field of analysis and design of cable-stayed structures and structural safety monitoring technology. It discloses a data processing method, equipment, apparatus, and medium. The method includes acquiring performance reference information, which characterizes the displacement changes of at least some nodes and the internal force changes of at least some components in the cable-stayed structure when various time-varying factors act on it. Based on the displacement and internal force changes, the method determines the performance indicators of the cable-stayed structure during a target time period. These performance indicators include the total nodal displacement index and the total component stress index under the influence of various time-varying factors, as well as the influence strength of each time-varying factor on the nodal displacement and component internal force. Based on the total nodal displacement index, the total component stress index, and the influence strength, the method obtains the performance evaluation results of the cable-stayed structure during the target time period. This method can make the performance evaluation results of the cable-stayed structure more closely match the actual performance changes.

Description

Technical Field

[0001] This application relates to the field of analysis and design of cable-stayed structure engineering and structural safety monitoring technology, and in particular to a data processing method, equipment, device and medium. Background Technology

[0002] Compared to traditional reinforced concrete structures, steel structures offer advantages such as lighter weight and easier construction. As a type of steel structure, cable-stayed structures, in addition to the fundamental advantages of steel structures, also feature lightweight yet high strength, large spans, and complex shapes, making them widely used in various large-scale and landmark buildings. After cable-stayed structures are put into service, their overall performance gradually declines with increasing service life due to various time-varying factors (such as corrosion and creep). This performance decline is mainly manifested in increased nodal displacements and reduced load-bearing capacity of components. Therefore, to ensure building safety, it is necessary to assess the performance changes of cable-stayed structures during their service life before or after commissioning, in order to proactively mitigate potential safety hazards.

[0003] Currently, some structural safety evaluation methods relying on finite element model calculations and equipment monitoring and data processing can obtain performance data of cable-stayed structures at a specific moment, but this data is not comprehensive enough to reflect the true performance changes of the cable-stayed structure during its service life. Other techniques train models based on historical monitoring data of the cable-stayed structure, then input real-time monitoring data into the trained model, which outputs performance evaluation results. Due to limitations in model accuracy, the performance evaluation results obtained by these techniques are inaccurate and similarly fail to reflect the true performance changes of the cable-stayed structure. Summary of the Invention

[0004] This application provides a data processing method, a computer device, and a readable storage medium, which solves the technical problem that the performance evaluation results of cable-stayed structures cannot reflect the actual performance changes, and achieves the technical effect of making the performance evaluation results of cable-stayed structures more consistent with the actual performance changes.

[0005] To achieve the above objectives, the main technical solutions adopted in this application include: In a first aspect, embodiments of this application provide a data processing method, including: Obtain performance reference information, which characterizes the displacement variation characteristics of at least some nodes and the internal force variation characteristics of at least some components in the cable-stayed structure when various time-varying factors are applied to the cable-stayed structure. Based on the displacement change characteristics and the internal force change characteristics, the performance indicators of the cable-stayed structure are determined during the target time period. The performance indicators include the total nodal displacement and total component stress under the action of each time-varying factor, as well as the influence of each time-varying factor on the nodal displacement and component internal force. Based on the total nodal displacement index, the total component stress index, and the influence intensity, the performance evaluation results of the cable-stayed structure during the target time period are obtained.

[0006] Secondly, embodiments of this application provide a data processing apparatus, including: The information acquisition module is used to acquire performance reference information, which characterizes the displacement change characteristics of at least some nodes and the internal force change characteristics of at least some components in the cable-stayed structure when various time-varying factors are applied to the cable-stayed structure. The index determination module is used to determine the performance index of the cable-stayed structure in a target time period based on the displacement change characteristics and the internal force change characteristics. The performance index includes the total index of nodal displacement and the total index of component stress under the action of each time-varying factor, as well as the influence of each time-varying factor on nodal displacement and component internal force. The result generation module is used to obtain the performance evaluation results of the cable-stayed structure during the target time period based on the total nodal displacement index, the total component stress index, and the influence magnitude. Thirdly, embodiments of this application provide a computer device, including: A memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, the processor executing the computer instructions to perform the data processing method as described in any of the preceding claims.

[0007] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer instructions that cause a computer to perform the data processing method described in any of the preceding claims. In some embodiments of this application, based on the characteristics of nodal displacement changes and component internal force changes corresponding to various time-varying factors, the total nodal displacement index and total component stress index of the cable-stayed structure are determined. This allows for the determination of the variation patterns of the total nodal displacement index and the total component stress index with the service life of the cable-stayed structure. Based on these variation patterns, the performance changes of the cable-stayed structure during its service life can be obtained, thus solving the technical problem in some technologies where incomplete performance data prevents the determination of cable-stayed structure performance changes. Furthermore, based on the influence of various time-varying factors on nodal displacement and component internal force, the performance evaluation results of the cable-stayed structure are determined. This allows the performance evaluation results to reflect the influence characteristics of different time-varying factors on the cable-stayed structure, thereby making the performance evaluation results of the cable-stayed structure more closely match the actual performance changes. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0009] Figure 1 A schematic diagram of a cable-stayed structure provided for some embodiments of this application; Figure 2 for Figure 1 A cross-sectional view of the cable-stayed structure in the image; Figure 3 A flowchart illustrating a data processing method provided for some embodiments of this application; Figure 4 Schematic diagrams of a data processing apparatus provided for some embodiments of this application; Figure 5 This is a schematic diagram of the structure of a computer device provided for some embodiments of this application. Detailed Implementation

[0010] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0011] Cable-stayed structures mainly consist of tension cables and compression members. Cables and compression members are collectively referred to as members. Each cable-stayed structure may include at least one member. Each member has two ends. These ends are also called nodes, and nodes can include constrained nodes and free nodes. Constrained nodes are mainly used to connect supporting structures such as foundations and supports. During the service life of a cable-stayed structure, constrained nodes typically experience small displacements due to the constraints of the supporting structure. Free nodes are mainly used for connections between members. During the service life of a cable-stayed structure, if subjected to external forces or if the cable-stayed structure deforms, free nodes can experience larger displacements.

[0012] For ease of understanding, please refer to the following: Figure 1 The diagram below is a schematic representation of a cable-stayed structure provided in some embodiments of this application. Figure 1 In this design, the cable-stayed structure is a three-dimensional dome structure. This three-dimensional dome structure consists of 13 compression members and 84 tension cables, divided circumferentially into 12 equal parts, with a total of 38 nodes. Of all the nodes, 26 are free nodes and 12 are constrained nodes. Constrained nodes are located on the outermost ring of the structure and are used to connect supporting structures, such as point N01. Free nodes are located in the inner region of the structure and are used for connections between components, such as N02.

[0013] See also Figure 2 ,for Figure 1 A cross-sectional view of the cable-stayed structure. Figure 2 In the diagram, N1-N4 represent free nodes. B1, B2, JS1, JS2, XS1, XS2, and HS1 represent structural members. For example, B1, B2, JS1, and JS2 represent compression members, and XS1, XS2, and HS1 represent tension cables. Numbers with triangular symbols indicate the elevation of their location. The "3" under the horizontal line indicates the length of the horizontal section.

[0014] It should be noted that, Figure 1 and Figure 2 This is one example of a cable-stayed structure. In practical applications, the number of components, nodes, and topological connections of each cable-stayed structure can be determined according to actual needs. Different cable-stayed structures may have different numbers of components, nodes, and topological connections.

[0015] When cable-stayed structures are applied to buildings, their overall performance gradually declines with increasing service life due to various time-varying factors. This performance degradation is primarily manifested in increased nodal displacements and reduced load-bearing capacity of components. Time-varying factors refer to various factors that have a continuous impact on cable-stayed structures over time, such as corrosion and creep.

[0016] Corrosion refers to the process by which components of a cable-stayed structure undergo electrochemical reactions with substances in their environment, leading to the gradual corrosion of the components. Corrosion reduces the cross-sectional area of ​​the components. This, on the one hand, reduces the load-bearing capacity of the components (i.e., the maximum internal force the component can withstand). On the other hand, it reduces the stiffness of the components, leading to a redistribution of internal forces among the components, causing changes in the internal forces (i.e., the actual load-bearing capacity) of at least some components. Furthermore, reduced stiffness makes the components more susceptible to deformation under stress (e.g., lengthening or shortening), causing displacement at nodes (primarily free nodes).

[0017] Creep refers to the phenomenon where the strain (deformation per unit length of a member) of a cable-stayed structure slowly increases over time under constant stress and temperature. Specifically, creep causes a slow change in the shape of a member (such as elongation), which in turn leads to changes in the geometry and stress distribution of the cable-stayed structure. This results in two consequences: firstly, a redistribution of internal forces among the members, causing changes in the internal forces of at least some members; and secondly, displacement of at least some nodes.

[0018] Based on the above description, to ensure building safety before or after the cable-stayed structure is put into use, it is necessary to assess the performance changes of the cable-stayed structure during its service life and to predict in advance when the cable-stayed structure will reach its serviceability limit state or ultimate limit state. The serviceability limit state refers to the maximum allowable deformation of the cable-stayed structure, including structural deformation and nodal displacement. The ultimate limit state refers to the maximum allowable internal force borne by the components of the cable-stayed structure, or less than the minimum load-bearing capacity required to maintain the structure's shape and stiffness. Typically, the serviceability limit state can be assessed based on nodal displacement, and the ultimate limit state can be assessed based on component internal forces. If the cable-stayed structure reaches either the serviceability limit state or the ultimate limit state, it indicates a significant safety hazard in the building, requiring measures to eliminate the hazard.

[0019] Currently, some technologies rely on finite element model calculations and structural safety evaluation methods based on equipment monitoring and data processing to obtain performance data of cable-stayed structures at a specific moment. However, the modeling process of these technologies is cumbersome and complex, and the resulting performance data is not comprehensive enough to reflect the true performance changes of the cable-stayed structure throughout its service life.

[0020] Other technologies rely on historical monitoring data of cable-stayed structures, using expert scoring to assess the performance status corresponding to that data. Then, the historical monitoring data is used as samples, and the corresponding performance statuses are used as sample labels for model training. Finally, real-time monitoring data of the cable-stayed structure is input into the trained model, which outputs the performance evaluation results. However, the accuracy of these technologies is affected by the subjectivity of expert scoring, leading to inaccurate performance evaluations that fail to reflect the true performance changes of the cable-stayed structure throughout its service life.

[0021] Other technologies rely on big data monitoring and multi-sensor data to calculate and weight scores various monitoring indicators layer by layer to obtain the current performance evaluation results of the cable-stayed structure. However, these technologies have two drawbacks: firstly, they require a large number of monitoring devices; secondly, they can only obtain the current performance evaluation results of the cable-stayed structure and cannot reflect the true performance changes of the cable-stayed structure throughout its service life.

[0022] Therefore, this application provides a data processing method that can make the performance evaluation results of cable-stayed structures more closely match the actual performance changes, solving the technical problem that the performance evaluation results of cable-stayed structures in some technologies cannot reflect the actual performance changes. The data processing method can be applied to electronic devices. Electronic devices may include, but are not limited to, servers, desktop computers, tablet computers, controllers, etc. (See also...) Figure 3 This is a flowchart illustrating a data processing method provided in some embodiments of this application. Figure 3 In this context, the data processing method includes the following steps: Step S301: Obtain performance reference information. The performance reference information characterizes the displacement change characteristics of at least some nodes and the internal force change characteristics of at least some components in the cable-stayed structure when various time-varying factors are applied to the cable-stayed structure.

[0023] Specifically, displacement variation characteristics refer to the variation law of nodal displacement of cable-stayed structure with the service life of cable-stayed structure, and internal force variation characteristics refer to the variation law of component internal force of cable-stayed structure with the service life of cable-stayed structure.

[0024] Examples of time-varying factors include corrosion and creep. Each time-varying factor may have its own corresponding time-varying characteristics. Time-varying characteristics refer to the influence of time-varying factors on cable-stayed structures.

[0025] In this embodiment, the time-varying characteristics of each time-varying factor are represented by a time-varying function related to the service life t of the cable-stayed structure. The time-varying functions for different time-varying factors can be different.

[0026] For example, the time-varying function of corrosion can be shown as expression (1).

[0027] (1) Where t represents the service life of the cable-stayed structure, which can be in years. This represents the corrosion depth of the components in the cable-stayed structure in year t. U represents the corrosion rate in the first year after the cable-stayed structure is put into use. r represents the corrosion trend.

[0028] For example, the time-varying function of creep can be shown as expression (2).

[0029] (2) Where t represents the service life of the cable-stayed structure, which can be in years. This represents the stress in the components of the cable-stayed structure in year t. This represents the initial equivalent elastic modulus of the component. It represents the equivalent elastic modulus of a component after creep. Let represent the creep strain of a member in a cable-stayed structure in year t, where creep strain refers to the strain of the member caused by creep.

[0030] In this embodiment, a cable-stayed structure model can be constructed based on the time-varying characteristics (i.e., time-varying functions) of multiple time-varying factors and the topological material information of the cable-stayed structure. Running the cable-stayed structure model yields its mechanical variation characteristics. Based on these mechanical variation characteristics, the displacement variation characteristics of at least some nodes and the internal force variation characteristics of at least some components in the cable-stayed structure can be determined when each time-varying factor acts on it. Specifically, the topological material information is used to characterize the material properties and topological connections of the cable-stayed structure. The mechanical variation characteristics characterize the correlation between multiple mechanical physical quantities in the cable-stayed structure when multiple time-varying factors act together. These mechanical physical quantities may include, but are not limited to, component cross-sections, component stiffness, component internal forces, component stresses, component strains, and nodal displacements.

[0031] In this embodiment, based on expressions (3)-(10), the displacement change characteristics and internal force change characteristics corresponding to each time-varying factor can be obtained from the mechanical change characteristics. That is, based on expressions (3)-(10), the first displacement change characteristics of at least some nodes and the first internal force change characteristics of at least some components in the cable-stayed structure can be determined when corrosion acts on the cable-stayed structure, and the second displacement change characteristics of at least some nodes and the second internal force change characteristics of at least some components in the cable-stayed structure can be determined when creep acts on the cable-stayed structure. Among them, the first displacement change characteristics can reflect the influence characteristics of corrosion on the node displacement of the cable-stayed structure. The first internal force change characteristics can reflect the influence characteristics of corrosion on the component internal force of the cable-stayed structure. The second displacement change characteristics can reflect the influence characteristics of creep on the node displacement of the cable-stayed structure. The second internal force change characteristics can reflect the influence characteristics of creep on the component internal force of the cable-stayed structure.

[0032] (3) (4) (5) (6) (7) (8) (9) (10) in, Here is the free node matrix of the cable-stayed structure. The structural tangent stiffness matrix includes free nodes. The coordination matrix for the cable-stayed structure. Here is the diagonal matrix of stresses in the members of the cable-stayed structure. Here is the material stiffness matrix of the cable-stayed structure. For matrix The inverse matrix, For matrix The transpose of the matrix, For matrix The transpose of the matrix, for The matrix formed This represents the displacement change at the k-th node caused by a unit area change in the j-th member of the cable-stayed structure. for The matrix formed This represents the displacement change of the k-th node caused by a unit length change in the l-th component. for The matrix formed This indicates that a change in the unit area of ​​the j-th component causes a change in the internal force of the i-th component. for The matrix formed This represents the change in internal force of the i-th component caused by a unit length change in the l-th component, where j and i range from 1 to... Integers between [a certain number] The value of l represents the number of components in the cable-stayed structure, ranging from 1 to... Integers between [a certain number] This represents the number of steel cables in a cable-stayed structure. Steel cables are one type of component in a cable-stayed structure, and the value of k ranges from 1 to... Integers between [a certain number] Let dA be the number of nodes in the cable-stayed structure, and dA be the change in area loss of the member. This refers to the change in creep elongation of the component. The nodal displacement is caused by the loss of component area. The nodal displacement is caused by the creep elongation of the component; This refers to the change in internal forces of a component caused by the loss of component area. This refers to the change in internal forces of the component caused by creep elongation. For dimension is A diagonal matrix in which the diagonal elements are all 1s and the other elements are all 0s.

[0033] In step S301, a cable-stayed structure model is constructed based on the time-varying characteristics of time-varying factors and the topological material information of the cable-stayed structure. Based on the cable-stayed structure model, the mechanical variation characteristics of the cable-stayed structure are determined. Based on the mechanical variation characteristics, the displacement variation characteristics of at least some nodes and the internal force variation characteristics of at least some components in the cable-stayed structure are determined. Thus, on the one hand, when constructing the cable-stayed structure model, it is not necessary to directly establish the correlation between the time-varying characteristics of time-varying factors and the displacement and internal force variation characteristics, thereby reducing the difficulty of model construction. On the other hand, it ensures that the displacement and internal force variation characteristics conform to the actual operating laws of the cable-stayed structure and the influence of time-varying factors on the cable-stayed structure, thereby improving the accuracy of the displacement and internal force variation characteristics.

[0034] It should be noted that, besides obtaining performance reference information through model construction, other methods can also be used to obtain performance reference information, and these methods should also fall within the scope of protection of this application. For example, corrosion and creep tests can be conducted on the cable-stayed structure in a laboratory to obtain the aforementioned performance reference information.

[0035] Step S302: Based on the displacement change characteristics and internal force change characteristics, determine the performance indicators of the cable-stayed structure during the target time period. The performance indicators include the total nodal displacement indicators and the total component stress indicators under the action of various time-varying factors, as well as the influence of various time-varying factors on nodal displacement and component internal force.

[0036] Specifically, the target period is defined as the timeframe from when the cable-stayed structure is put into use until any point in time during its operation. For example, the performance indicators for the cable-stayed structure in the second year refer to the performance indicators from the time the structure is put into use until the end of the second year. The performance indicators for the cable-stayed structure in the third year refer to the performance indicators from the time the structure is put into use until the end of the third year.

[0037] The overall nodal displacement index characterizes the influence of the overall displacement of multiple nodes in a cable-stayed structure on the overall structure under the action of a single time-varying factor. Specifically, the overall nodal displacement index can be obtained by averaging or weighting the displacements of multiple nodes. A preferred method for determining the overall nodal displacement index is provided in subsequent embodiments of this application, and will not be elaborated here.

[0038] The overall stress index of a component characterizes the influence of the overall internal forces of multiple components in a cable-stayed structure on the overall load-bearing capacity of the cable-stayed structure under the action of a single time-varying factor. Specifically, the overall stress index of a component can be obtained by averaging or weighting the internal forces of multiple components. A preferred method for determining the overall stress index of a component is provided in subsequent embodiments of this application, which will not be elaborated here.

[0039] The target period can refer to any time period after the cable-stayed structure is put into use, such as the first three years after the cable-stayed structure is put into use, or the second year after the cable-stayed structure is put into use.

[0040] In this embodiment, based on the displacement and internal force variation characteristics corresponding to any time-varying factor, the total nodal displacement index and total component stress index of the cable-stayed structure during the target time period can be determined under the action of that time-varying factor. That is, each time-varying factor has its own corresponding total nodal displacement index and total component stress index. For ease of understanding, the following example illustrates this.

[0041] For example, suppose that in step S301, the displacement change characteristics corresponding to corrosion are shown in Table 1, the internal force change characteristics corresponding to corrosion are shown in Table 2, the displacement change characteristics corresponding to creep are shown in Table 3, and the internal force change characteristics corresponding to creep are shown in Table 4.

[0042] Table 1. Displacement variation characteristics corresponding to corrosion Table 2. Characteristics of internal force changes corresponding to corrosion. Table 3 Displacement change characteristics corresponding to creep Table 4. Characteristics of internal force changes corresponding to creep. If the target period is the second year, the total nodal displacement index and the total component stress index can be calculated using the following method.

[0043] The average or weighted calculation of the multiple node displacements corresponding to the second year in Table 1 is performed to obtain the total node displacement index D11 corresponding to corrosion.

[0044] Converting the internal forces of multiple components corresponding to the second year in Table 2 into stresses, and then averaging or weighting the stresses, we can obtain the total stress index D21 of the component corresponding to corrosion.

[0045] The average or weighted calculation of multiple nodal displacements corresponding to the second year in Table 3 is used to obtain the total nodal displacement index D12 corresponding to creep.

[0046] Converting the internal forces of multiple components corresponding to the second year in Table 4 into stresses, and then averaging or weighting the stresses, we can obtain the total stress index D22 of the component corresponding to creep.

[0047] The influence of various time-varying factors on nodal displacements and component internal forces refers to the magnitude of the influence of each time-varying factor on nodal displacements and component internal forces. For example, taking Tables 1 to 4 above as examples, based on the second-year data in Table 1 and Table 3, it can be seen that corrosion has a relatively large influence on nodal displacements. Based on the second-year data in Table 2 and Table 4, it can be seen that creep has a relatively large influence on component internal forces.

[0048] Step S303: Based on the total nodal displacement index, the total component stress index, and the influence intensity, the performance evaluation results of the cable-stayed structure during the target time period are obtained.

[0049] In this embodiment, the performance evaluation results of the cable-stayed structure under various time-varying factors can be determined based on the influence intensity, the total nodal displacement index, and the total component stress index. Specifically, the total nodal displacement index under various time-varying factors and the influence intensity of each time-varying factor on the nodal displacement can be weighted and fused to obtain the first performance evaluation result of the cable-stayed structure in the target time period. The first performance evaluation result characterizes the degree of influence of the overall displacement of multiple nodes in the cable-stayed structure on the overall structure of the cable-stayed structure under the combined action of multiple time-varying factors. In the process of calculating the first performance evaluation result, time-varying factors with a greater influence intensity on nodal displacement can have a larger weight, and time-varying factors with a smaller influence intensity on nodal displacement can have a smaller weight. The sum of the weights of multiple time-varying factors is 1. For example, taking the second year in Tables 1 and 3 above as an example. Since the influence intensity of corrosion on nodal displacement is relatively large, in the calculation of the first performance evaluation result, the weight R11 of corrosion on nodal displacement can be greater than the weight R12 of creep on nodal displacement. The sum of R11 and R12 is 1. Based on D11, D12 and R11, R12 mentioned above, the first performance evaluation result can be D11*R11+D12*R12. It should be noted that subsequent embodiments of this application provide a more optimized method for determining weights in nodal displacement scenarios, which will not be elaborated here.

[0050] Similarly, by weighted and fused calculation of the total stress index of the components under various time-varying factors and the influence of each time-varying factor on the internal forces of the components, the second performance evaluation result of the cable-stayed structure in the target period can be obtained. The second performance evaluation result characterizes the degree of influence of the overall internal forces of multiple components in the cable-stayed structure on the overall bearing capacity of the cable-stayed structure under the combined action of multiple time-varying factors. Specifically, in the process of calculating the second performance evaluation result, time-varying factors with a greater influence on the internal forces of the components can have a larger weight, and time-varying factors with a smaller influence on the internal forces of the components can have a smaller weight. The sum of the weights of multiple time-varying factors is 1. For example, taking the second year in Tables 2 and 4 above as an example. Since creep has a relatively large influence on the internal forces of the components, in the calculation of the second performance evaluation result, the weight R21 of corrosion on the internal forces of the components can be less than the weight R22 of creep on the internal forces of the components. The sum of R21 and R22 is 1. Based on D21, D22 above and R21, R22 here, the second performance evaluation result can be D21*R21+D22*R22. It should be noted that in subsequent embodiments of this application, a better method for determining weights in component internal force scenarios is provided, which will not be elaborated here.

[0051] The first performance evaluation results described above can be used to assess whether the cable-stayed structure has reached its serviceability limit state. The second performance evaluation results described above can be used to assess whether the cable-stayed structure has reached its ultimate load-bearing capacity state.

[0052] Based on the methods described in steps S301 to S303 above, performance evaluation results of the cable-stayed structure can be obtained for any target time period before or after its commissioning. Based on performance evaluation results for multiple target time periods, the performance changes of the cable-stayed structure during its service life can be determined. For example, before cable-stayed structure A is put into service, a model can be constructed based on the topological material information and time-varying characteristics of various time-varying factors of cable-stayed structure A. Based on the cable-stayed structure model, performance evaluation results for the first, second, ..., nth year after commissioning of cable-stayed structure A can be obtained. Based on the performance evaluation results over many years, the performance changes of cable-stayed structure A during its service life can be obtained, thereby determining the time period during which cable-stayed structure A will reach its serviceability limit state or ultimate limit state. In this way, avoidance measures can be taken in advance to ensure the safety of the building.

[0053] In summary, in the technical solutions of some embodiments of this application, based on the nodal displacement variation characteristics and component internal force variation characteristics corresponding to various time-varying factors, the total nodal displacement index and the total component stress index of the cable-stayed structure are determined. This allows us to obtain the variation law of the total nodal displacement index with the service life of the cable-stayed structure, as well as the variation law of the total component stress index with the service life of the cable-stayed structure. Based on these variation laws, the performance changes of the cable-stayed structure during its service life can be obtained, thereby solving the technical problem in some technologies where incomplete performance data prevents the obtaining of cable-stayed structure performance changes. Furthermore, based on the influence of various time-varying factors on nodal displacement and component internal force, the performance evaluation results of the cable-stayed structure are determined. This allows the performance evaluation results to reflect the influence characteristics of different time-varying factors on the cable-stayed structure, thus making the performance evaluation results of the cable-stayed structure more closely match the actual performance changes.

[0054] In some embodiments, determining the performance indicators of the cable-stayed structure based on displacement change characteristics and internal force change characteristics in step S302 may include: Based on displacement variation characteristics, determine the actual displacement and node weight of at least some nodes in the target time period when each time-varying factor is applied to the cable-stayed structure; Based on the actual displacement and node weights, the total index of node displacement under the influence of various time-varying factors is determined.

[0055] Specifically, please refer to Tables 1 and 3 above. Since the displacement variation characteristics reflect the variation law of nodal displacement with the service time of the cable-stayed structure, the actual displacement of each node at any time period can be determined based on the displacement variation characteristics, which will not be elaborated here.

[0056] Node weights characterize the contribution of a single node's displacement to the total displacement of the cable-stayed structure. The total displacement of the cable-stayed structure refers to the overall displacement of multiple nodes within the structure. Based on the displacement variation characteristics corresponding to each time-varying factor, the node weight of each node under each time-varying factor can be determined. The node weight of the same node may differ under different time-varying factors.

[0057] Specifically, based on expression (11), the node weights of each node in the cable-stayed structure under corrosion can be calculated. .

[0058] (11) in, This represents the displacement change at the k-th node caused by a unit area change in the j-th member of the cable-stayed structure. For the area change of the j-th component, The number of components in a cable-stayed structure. This represents the number of nodes in the cable-stayed structure.

[0059] Based on expression (12), the node weights of each node in the cable-stayed structure under creep can be calculated. .

[0060] (12) in, This represents the displacement change at the k-th node caused by a unit length change in the l-th member of the cable-stayed structure. For the length change of the l-th component, This represents the number of cable members in the cable-stayed structure, where cable members are one type of component. Other parameters can be found in expression (11) above and will not be repeated here.

[0061] After obtaining the node weights of each node under each time-varying factor, the actual displacements of multiple nodes under the same time-varying factor can be weighted and fused with the node weights to obtain the total node displacement index under the action of each time-varying factor.

[0062] In the above embodiments, based on displacement change characteristics, the node weights and actual displacements of at least some nodes in the cable-stayed structure are determined. Based on these node weights and actual displacements, the total node displacement index under various time-varying factors is then determined. This allows for a focus on nodes with large displacements and a disregard for nodes with small displacements when calculating the total node displacement index. This makes the total node displacement index more accurately reflect whether the cable-stayed structure has reached its normal serviceability limit, improving the accuracy of performance evaluation results.

[0063] In some embodiments, the above-mentioned determination of the total nodal displacement index under the influence of various time-varying factors based on actual displacement and nodal weights may include: For a node under the action of a time-varying factor, the difference between the initial load displacement and the displacement threshold of the node is taken as the residual displacement. The residual displacement is divided into multiple displacement intervals, and the displacement safety of the node is determined based on the target displacement interval where the actual displacement of the node is located. Based on displacement safety and node weight, the total index of node displacement under the influence of various time-varying factors is determined.

[0064] The displacement threshold is the displacement safety limit for each node. Each node can have its own corresponding displacement safety limit. The initial load displacement refers to the displacement of each node when the cable-stayed structure is in its initial load state. After the cable-stayed structure is put into use, the initial load displacement is a fixed value. The displacement safety factor is used to characterize the safety level of the node displacement. For ease of understanding, the following example illustrates this. Assume the initial coordinates of node k are... The nodal coordinates under the initial load state are The displacement threshold is The initial load displacement is Remaining displacement Assuming the actual displacement coordinate of node k during the target time period is x, then the actual displacement of node k during the target time period is... . Every time exceeding The displacement safety factor can be gradually reduced from 1 / n1. Here, n1 can be an odd number. For ease of understanding, assume the maximum displacement safety factor is... The minimum displacement safety factor is Then, based on expression (13), the displacement safety factor of node k under each time-varying factor can be determined. .

[0065] (13) Based on the displacement safety factor shown in expression (13) Node displacements can be categorized into several levels, such as very safe, relatively safe, ..., relatively dangerous, and very dangerous. For example, the actual displacement of node k is less than or equal to... When this condition is met, it indicates that the displacement of node k is at a very safe level. The actual displacement of node k is greater than... and less than or equal to When this condition is met, it can be indicated that the displacement of node k is at a relatively safe level. And so on.

[0066] Displacement safety factor of multiple nodes under the same time-varying factor By combining the calculation with the node weights, the total index of node displacement under the influence of time-varying factors can be obtained.

[0067] To facilitate understanding, examples will be provided below.

[0068] Assuming a displacement threshold =10mm, n=5, , Furthermore, under the influence of corrosion, the initial load displacement of node T11 is 3 (i.e., the aforementioned...). The actual displacement is 3 (i.e., the above). The remaining displacement is 7 (i.e., the above). The initial load displacement of node T12 during the target time period is 1 (i.e., the above). The actual displacement is 7.5 (i.e., the above). The remaining displacement is 9 (i.e., the above). ).

[0069] Therefore, for node T11, the remaining displacement Dividing the space into 5 equal parts yields 5 displacement intervals: 0–1.4, 1.4–2.8, ..., 6.6–7. The displacement safety factor for the interval 0–1.4 is... Displacement safety factor in the range of 1.4 to 2.8 And so on. Since the actual displacement of node T11 falls within the range of 2.8 to 4.2, the displacement safety factor of node T11 is... .

[0070] Similarly, for node T12, the remaining displacement Dividing the space into 5 equal parts yields 5 displacement intervals: 0–1.8, 1–3.6, ..., 7.2–9. The displacement safety factor for interval 0–1 is... Displacement safety factor in interval 1 to 2 And so on. Since the actual displacement of node T12 falls within the interval 7.2 to 9, the displacement safety factor of node T12 is... .

[0071] By combining the displacement safety factor and node weight of nodes T11 and T12, the total nodal displacement index under corrosion can be obtained. *5+ *1.

[0072] Based on the examples above, it can be seen that, generally, the lower the displacement safety factor of a node, the greater its corresponding node weight. This indicates that the node makes a significant contribution to the overall structural performance of the cable-stayed structure, but also carries a high risk of displacement (i.e., low displacement safety factor). Through this fusion calculation, the resulting total node displacement index can accurately reflect the actual operating characteristics of the cable-stayed structure.

[0073] In the above embodiments, by dividing the remaining displacement into multiple displacement intervals and determining the target displacement interval based on the actual displacement of the node, the displacement safety of the node can be determined. This allows the actual displacement of the node to be quantified, so that the final total node displacement index can directly reflect the node displacement safety level. This improves the semantics of the performance evaluation results and reduces the conversion between performance evaluation results and safety levels.

[0074] In some embodiments, determining the performance indicators of the cable-stayed structure based on displacement change characteristics and internal force change characteristics in step S302 may include: Based on the characteristics of internal force variation, the internal force variation and component weight of at least some components during the target time period are determined when each time-varying factor acts on the cable-stayed structure, and the internal force variation of each component is converted into stress variation. Based on the stress change and component weight, the total stress index of the component under the action of various time-varying factors is determined.

[0075] Specifically, similar to the actual displacement of the nodes mentioned above, since the internal force variation characteristics reflect the variation law of the internal force of the components with the service time of the cable-stayed structure, the internal force variation of each component at any time period can be determined based on the internal force variation characteristics, and the internal force variation can be converted into the corresponding stress variation, which will not be elaborated here.

[0076] Component weights characterize the contribution of the internal force change of a single component to the total internal force change of the cable-stayed structure. The total internal force change of the cable-stayed structure refers to the overall internal force change of multiple components within the structure. Based on the internal force change characteristics corresponding to each time-varying factor, the component weight of each component under each time-varying factor can be determined. The component weight of the same component may differ under different time-varying factors.

[0077] Specifically, based on expression (14), the component weights of each member in the cable-stayed structure under corrosion can be calculated. .

[0078] (14) in, The change in internal force of the i-th member caused by the change in unit area of ​​the j-th member of the cable-stayed structure is indicated. Other parameters can be found in the above expressions (11) and (12), and will not be repeated here.

[0079] Based on expression (15), the component weights of each member in the cable-stayed structure under creep can be calculated. .

[0080] (15) in, The expression represents the change in internal force of the i-th member caused by a unit length change in the l-th member of the cable-stayed structure. Other parameters can be found in the above expressions (11) and (12), and will not be repeated here.

[0081] After obtaining the component weights for each component under each time-varying factor, the internal force changes of multiple components under the same time-varying factor can be weighted and fused with the component weights to obtain the total stress index of the components under each time-varying factor. This process is similar to the calculation of the total nodal displacement index mentioned above, and will not be elaborated here.

[0082] In the above embodiments, based on the characteristics of internal force changes, the component weights and internal force changes of at least some components in the cable-stayed structure are determined. Based on these component weights and internal force changes, the total stress index of the components under various time-varying factors is then determined. In this way, the contribution of components with large internal force changes can be increased and the contribution of components with small internal force changes can be decreased in the calculation of the total stress index. This allows the total stress index to more accurately reflect whether the cable-stayed structure has reached its ultimate limit state, improving the accuracy of the performance evaluation results.

[0083] In some embodiments, components in a cable-stayed structure exhibit two failure modes: strength failure mode and relaxation failure mode. Strength failure mode refers to the mode where the internal forces of a component exceed its maximum load-bearing capacity, leading to fracture, yielding, or instability. Relaxation failure mode refers to the mode where the internal forces of a component (mainly cables) exceed its minimum load-bearing capacity, causing the component to relax and not participate in load-bearing. When determining whether a cable-stayed structure has reached its ultimate limit state, it is necessary to assess both failure modes separately, i.e., whether the internal forces of the components in the cable-stayed structure are greater than the maximum load-bearing capacity or less than the minimum load-bearing capacity. Therefore, the above-mentioned determination of the total stress index of components under various time-varying factors based on stress variation and component weight can include: Based on the stress change, component weight, and stress upper limit threshold, the total stress index of the first component under the action of various time-varying factors is determined. Based on the stress change, component weight, and stress lower limit threshold, the total stress index of the second component under the action of various time-varying factors is determined. The minimum stress index between the first component and the second component is taken as the total stress index of the component.

[0084] Among them, the upper stress threshold corresponds to the maximum bearing capacity under the strength failure mode, and the lower stress threshold corresponds to the minimum bearing capacity under the relaxation failure mode.

[0085] Similar to determining the overall index of nodal displacement, for a single component under the influence of a time-varying factor, the difference between the stress change and the upper stress threshold can be used as the first residual stress. This first residual stress is then divided into multiple stress intervals, and based on the first stress interval where the stress change falls, the first stress safety factor of the component is determined. Based on the first stress safety factor and the component weight, the overall stress index of the first component under each time-varying factor can be determined. Specifically, for any component i, assuming the stress of component i in the first year after the cable-stayed structure is put into service is... The upper limit threshold of stress is Then the first residual stress Let's assume that in year t (where t is an integer greater than 1) after the cable-stayed structure is put into use, the stress on member i is σ. Then, the stress change of member i in year t is... The stress change of component i Every time exceeding The first stress safety factor can be gradually reduced to 1 / n². Here, n² can be an odd number. For ease of understanding, assume the maximum stress safety factor under the strength failure mode is... The minimum stress safety factor is Then, based on expression (16), the first stress safety factor of component i under each time-varying factor can be determined. .

[0086] (16) Based on the first stress safety factor in expression (16) This approach allows for the classification of component stress into multiple levels—very safe, relatively safe, ..., relatively dangerous, and very dangerous—under strength failure modes. By dividing the first residual stress into an odd number of stress intervals, a symmetrical and orderly classification of stress safety levels can be achieved under strength failure modes. For example, relatively safe and relatively dangerous stress intervals can be two symmetrical stress intervals, with the stress safety levels decreasing in an orderly manner across multiple stress intervals.

[0087] The first stress safety factor of multiple components under the same time-varying factor By integrating the component weights with the overall stress calculation, the total stress index of the first component corresponding to the time-varying factors under the strength failure mode can be obtained. This process is similar to the one described above based on displacement safety. The process of calculating the total index of nodal displacements is similar and will not be elaborated here.

[0088] In the above embodiments, by dividing the first residual stress into multiple stress intervals and determining the first stress safety level of the component based on the first stress interval where the stress change of the component is located, the stress change of the component can be quantified, so that the final first total stress index of the component can directly reflect the stress safety level of the component under the strength failure mode. In this way, the semantics of the performance evaluation results can be improved and the conversion between the performance evaluation results and the safety level can be reduced.

[0089] Similarly, for a component under the influence of one time-varying factor, the difference between the stress change and the lower stress threshold is taken as the second residual stress. This second residual stress is then divided into multiple stress intervals, and based on the second stress interval where the stress change falls, the second stress safety factor of the component is determined. Based on the second stress safety factor and the component weight, the total stress index of the second component under each time-varying factor is determined. Specifically, for any component i, assuming the stress of component i in the first year after the cable-stayed structure is put into service is... The lower limit threshold of stress is Then the second residual stress Let's assume that in year t (where t is an integer greater than 1) after the cable-stayed structure is put into use, the stress on member i is σ. Then, the stress change of member i in year t is... The stress change of component i Every time exceeding The initial stress safety factor can be gradually reduced to 1 / n³. Here, n³ can be an odd number. For ease of understanding, assume the maximum stress safety factor in the relaxation failure mode is... The minimum stress safety factor is Then, based on expression (17), the second stress safety factor of component i under each time-varying factor can be determined respectively. .

[0090] (17) Based on the second stress safety factor in expression (17) In the relaxation failure mode, the stress of a component can be classified into multiple levels, including very safe, relatively safe, ..., relatively dangerous, and very dangerous. By dividing the second residual stress into an odd number of stress intervals, the stress safety level can be symmetrically and orderly classified in the relaxation failure mode. For example, relatively safe and relatively dangerous are two symmetrical stress intervals, and the stress safety level decreases in an orderly manner across multiple stress intervals.

[0091] The second stress safety factor of multiple components under the same time-varying factor By integrating the component weights with the calculations, the total stress index of the second component corresponding to the time-varying factors under the relaxation failure mode can be obtained. This process is similar to the one described above based on displacement safety. The process of calculating the total index of nodal displacements is similar and will not be elaborated here.

[0092] In the above embodiments, by dividing the second residual stress into multiple stress intervals and determining the second stress safety level of the component based on the second stress interval where the stress change of the component is located, the stress change of the component can be quantified, so that the final obtained second component stress index can directly reflect the component stress safety level under the relaxation failure mode. In this way, the semantics of the performance evaluation results can be improved, and the conversion between the performance evaluation results and the safety level can be reduced.

[0093] In some embodiments, for any time-varying factor, if the total stress index of the first component is less than the total stress index of the second component, it indicates that under the influence of that time-varying factor, the components in the cable-stayed structure are approaching a strength failure mode. In this case, the total stress index of the first component can be used as the total stress index of the component corresponding to that time-varying factor. Conversely, if the total stress index of the second component is less than the total stress index of the first component, it indicates that under the influence of that time-varying factor, the components in the cable-stayed structure are approaching a relaxation failure mode. In this case, the total stress index of the second component can be used as the total stress index of the component corresponding to that time-varying factor.

[0094] In the above embodiments, the total stress index of the component is calculated according to the strength failure mode and the relaxation failure mode respectively, which can comprehensively cover multiple failure scenarios of the component and ensure the comprehensiveness of the performance evaluation results.

[0095] In some embodiments, in step S303 above, the first weight can be calculated based on expression (18). This is used to quantify the impact of corrosion on node displacement.

[0096] (18) For explanations of the relevant parameters, please refer to the above expressions (11), (12), (14), and (15), which will not be repeated here.

[0097] Similarly, the second weight can be calculated based on expression (19). It is used to quantify the impact of creep on nodal displacement.

[0098] (19) For explanations of the relevant parameters, please refer to the above expressions (11), (12), (14), and (15), which will not be repeated here.

[0099] Similarly, the third weight can be calculated based on expression (20). It is used to quantify the impact of corrosion on the internal forces of components.

[0100] (20) For explanations of the relevant parameters, please refer to the above expressions (11), (12), (14), and (15), which will not be repeated here.

[0101] Similarly, the fourth weight can be calculated based on expression (21). It is used to quantify the impact of creep on the internal forces of a component.

[0102] (twenty one) For explanations of the relevant parameters, please refer to the above expressions (11), (12), (14), and (15), which will not be repeated here.

[0103] In some embodiments, based on the first performance evaluation result and the second performance evaluation result obtained in step S303, the method of this application further includes: When the first performance evaluation result is lower than the first performance threshold, generate the first performance alarm information according to the alarm method corresponding to the first performance evaluation result; When the second performance evaluation result is lower than the second performance threshold, a second performance alarm message is generated according to the alarm method corresponding to the second performance evaluation result. Among them, the alarm method is used to characterize the importance of the performance evaluation results.

[0104] Specifically, if the first performance evaluation result is lower than the first performance threshold, it indicates that the cable-stayed structure has reached its serviceability limit state, and a first performance alarm message can be generated according to the first alarm method. If the second performance evaluation result is lower than the second performance threshold, it indicates that the cable-stayed structure has reached its ultimate load-bearing capacity state, and a second performance alarm message can be generated according to the second alarm method. Since the ultimate load-bearing capacity state represents the load-bearing safety of the cable-stayed structure, while the serviceability limit state only represents the applicable deformation and usability of the cable-stayed structure, identifying whether the cable-stayed structure has reached its ultimate load-bearing capacity state is more important. Therefore, the second alarm method can be more urgent than the first alarm method. For example, when the first performance evaluation result is lower than the first performance threshold, a yellow alarm can be generated; when the second performance evaluation result is lower than the second performance threshold, a red alarm can be generated.

[0105] In some embodiments, the method of this application further includes: Based on displacement and internal force variation characteristics, the displacement safety factor of each node and the stress safety factor of each component during the target time period are determined. A third performance alarm message is generated if one of the following conditions is met: The displacement safety factor of at least some nodes is lower than the first safety factor threshold; At least some components have a stress safety factor below the second safety factor threshold.

[0106] Specifically, the first and second performance evaluation results can be used to characterize the overall performance of the cable-stayed structure, reflecting its performance uniformity. The displacement safety factor of nodes and the stress safety factor of components can be used to characterize local displacements and internal forces within the cable-stayed structure, reflecting its performance dispersion. Even when the overall performance of the cable-stayed structure is not below the performance threshold, the displacement safety factor of one node or the stress safety factor of some components may fall below the threshold, potentially causing damage to the cable-stayed structure. Therefore, based on the first and second performance evaluation results, along with displacement and stress safety factors, the performance of the cable-stayed structure can be evaluated in a tiered manner to ensure the accuracy and completeness of the performance assessment.

[0107] The following combination Figure 1 and Figure 2 The method described in this application is illustrated by the three-dimensional dome structure. Specifically, Figure 1 and Figure 2 In the three-dimensional dome structure shown, hollow circular steel tubes are used as compression members, with a yield strength of 345 MPa and an elastic modulus E. b for MPa. The steel wire rope used as a tension cable has an ultimate tensile strength of 1670 MPa and an elastic modulus E. s for MPa. Components are classified into 7 categories based on symmetry: B1, B2, JS1, JS2, XS1, XS2, and HS1. Nodes are classified into 4 categories: N1, N2, N3, and N4. Components of the same category have the same parameters, and the specific component parameters are shown in Table 5 and... Figure 2 As shown. Both dead loads and live loads in the structure are surface loads, calculated at 0.5 kN / m. 2 The load values ​​are determined, with the load distribution spanning the entire span. For the serviceability limit state calculation, the load combination is 1.0 dead load + 1.0 live load; for the ultimate limit state calculation, the load effect is 1.3 dead load + 1.5 live load. The outermost nodes of the structure constrain the displacements in the x, y, and z directions (i.e., serve as constraint nodes).

[0108] Table 5 Component Parameters Based on the above description, the performance evaluation results of the cable-stayed structure can be obtained by following these steps.

[0109] 1) Select the time-varying function for corrosion and the time-varying function for creep.

[0110] Specifically, the corrosion time-varying function used in this embodiment can be expressed as in expression (22).

[0111] (twenty two) The relevant parameters are explained in expression (1) and will not be repeated here. The parameters related to corrosion are shown in Table 5.

[0112] The creep time-varying function used in this embodiment can be expressed as shown in expression (23).

[0113] (twenty three) For details on the relevant parameters, please refer to expression (2), which will not be repeated here.

[0114] Based on expression (24), the expression (23) can be calculated. .

[0115] (twenty four) in, ; ; ; This is the initial equivalent elastic modulus of the component; To account for the equivalent elastic modulus of the component after creep, the service life t of the cable-stayed structure and the cable stress at that moment are considered. The E of the component can be calculated. t Value. It should be noted that in the above expression, express The calculation results at t=100 express The calculation results at t=4200.

[0116] In expression (23), at t=1, the creep strain of the component in the first year can be directly obtained based on expression (23). At t>1, the creep strain of the component in year t can be calculated based on the above expression (23) and the following expression (25). .

[0117] (25) Based on expression (26), the creep strain of the component in the first t years can be calculated. .

[0118] (26) Based on expression (27), the creep strain can be calculated. Elongation of the component caused .

[0119] (27) in, Indicates the initial length of the component.

[0120] 2) Establish a performance evaluation system.

[0121] Specifically, under normal serviceability limits, the displacement limit of a node should not exceed 1 / 250 of the structural span, i.e., 0.048m. Under ultimate limit state of bearing capacity, the maximum stress limit for compression members and cables is specified as 310MPa and 835MPa respectively, and the minimum stress limit is... It can be calculated from 2% of the maximum stress limit of the compression bar and the following formula, respectively. The specific calculation formula is shown in expression (28), and the specific calculation results are shown in Table 6.

[0122] (28) In the formula, Here, A is the minimum allowable stress for the cable, W is the cross-sectional area, L is the cable's self-weight, and w is the cable span. w is the cable sag that does not affect the structural appearance and is generally taken as... ; The angle between the cable and the ground.

[0123] Table 6 Minimum Stress Limits The following evaluation set is established for structural safety indicators: S = {Very safe, Relatively safe, Average, Relatively dangerous, Very dangerous}. The safety factors for nodal displacements and member internal forces are both set to [value missing]. For example, security. =9 indicates very safe, a level of security. =7 indicates a relatively safe level. Based on the above safety level, the overall performance evaluation result of the cable-stayed structure can be calculated (i.e., the first and second performance evaluation results mentioned above). Based on the overall performance evaluation result of the cable-stayed structure, the safety level of individual nodes, and the safety level of individual components, the performance of the cable-stayed structure can be evaluated in layers. For each layer of evaluation, two alarm levels can be set: the alarm value for the first alarm level is 5, and the alarm value for the second alarm level is 3. That is, if any value in the overall performance evaluation result, the safety level of an individual node, or the safety level of an individual component is below 5, a first-level red or yellow alarm is issued; if any value is below 3, a more stringent second-level red or yellow alarm is issued.

[0124] 3) Based on the mechanical variation characteristics of the cable-stayed structure, calculate the displacement variation characteristics of at least some nodes and the internal force variation characteristics of at least some components in the cable-stayed structure. Based on these characteristics, obtain the displacement safety factor and node weight of each node, and the stress safety factor and component weight of each component when different time-varying factors act on the cable-stayed structure. Then, based on these displacement safety factors, node weights, stress safety factors, and component weights, obtain the overall performance evaluation results of the cable-stayed structure. Some of the calculated data are shown in Tables 7 to 9.

[0125] Table 7 Vertical displacement values ​​(m) of some nodes in some years Table 8. Stress magnitude (MPa) of some components in some years. Table 9 Overall performance evaluation results and safety level (partial data) Among them, in Table 9, This represents the total index of nodal displacement under corrosion. This is the total index of nodal displacement under creep. The node weights under corrosion are... The node weights under creep are... This is the first performance evaluation result used to determine whether the cable-stayed structure has reached its normal serviceability limit state. This represents the total stress index of a component under strength failure mode caused by corrosion. This represents the total stress index of a component under strength failure mode during creep. This represents the component weight under the strength failure mode caused by corrosion. This represents the component weight under the strength failure mode during creep. This is a second performance evaluation result used to determine whether a cable-stayed structure has reached its ultimate bearing capacity under the strength failure mode. This represents the total stress index of a component under the relaxation failure mode caused by corrosion. This represents the overall stress index of a component under the relaxation failure mode during creep. This represents the component weight under the relaxation failure mode caused by corrosion. This represents the component weights under the relaxation failure mode during creep. This is a second performance evaluation result used to determine whether a cable-stayed structure has reached its ultimate bearing capacity under the relaxation failure mode.

[0126] 4) Generate alarm information. For example, in Table 9, in the 43rd year, If the value is below 5, a Level 1 yellow alarm can be generated to indicate a structural safety risk. In the 47th year, If the value falls below the warning threshold of 5, a Level 1 red warning can be generated to indicate the risk of component loosening. In year 58, If the score drops below 3 points, a more urgent Level 2 yellow alert can be generated to indicate a structural safety risk. In the 67th year, If the value falls below alarm value 3, a more urgent secondary red alarm can be generated to indicate the risk of component relaxation. Also, refer to Tables 7 and 8. In year 71, structural nodes N1 and N3 will exceed their maximum displacement limits, generating a yellow alarm to indicate displacement safety risks at nodes N1 and N3. Simultaneously, component JS1 will reach its minimum stress limit of 4.70 MPa, generating a red alarm to indicate internal force safety risks in component JS1.

[0127] 5) Comprehensive Structural Evaluation. Based on the aforementioned time-varying analysis and alarm mechanism, the three-dimensional dome structure of this embodiment should undergo localized reinforcement and strengthening treatment when it reaches its 43rd year of service. If no reinforcement or strengthening measures are taken for the structure by the 47th year at the latest, the structure can be decommissioned based on the alarm mechanism and safety considerations.

[0128] See also Figure 4 This is a schematic diagram of a data processing apparatus provided in the first embodiment of this application. The data processing apparatus includes: The information acquisition module 401 is used to acquire performance reference information, which characterizes the displacement change characteristics of at least some nodes and the internal force change characteristics of at least some components in the cable-stayed structure when various time-varying factors are applied to the cable-stayed structure. The index determination module 402 is used to determine the performance index of the cable-stayed structure in the target time period based on the displacement change characteristics and internal force change characteristics. The performance index includes the total index of nodal displacement and the total index of component stress under the action of various time-varying factors, as well as the influence of various time-varying factors on nodal displacement and component internal force. The result generation module 403 is used to obtain the performance evaluation results of the cable-stayed structure during the target time period based on the total nodal displacement index, the total component stress index, and the influence magnitude. In some embodiments, the information acquisition module 401 is specifically used for: Based on the time-varying characteristics of multiple time-varying factors and the topological material information of the cable-stayed structure, a cable-stayed structure model is constructed. Run the cable-stayed structure model to obtain the mechanical variation characteristics of the cable-stayed structure; Based on the characteristics of mechanical changes, performance reference information is determined.

[0129] In some embodiments, the indicator determination module 402 is specifically used for: Based on displacement variation characteristics, determine the actual displacement and node weight of at least some nodes in the target time period when each time-varying factor is applied to the cable-stayed structure; Based on the actual displacement and node weights, the total index of node displacement under the influence of various time-varying factors is determined.

[0130] In some embodiments, the indicator determination module 402 is specifically used for: For a node under the action of a time-varying factor, the difference between the initial load displacement and the displacement threshold of the node is taken as the residual displacement. The residual displacement is divided into multiple displacement intervals, and the displacement safety of the node is determined based on the target displacement interval where the actual displacement of the node is located. Based on displacement safety and node weight, the total index of node displacement under the influence of various time-varying factors is determined.

[0131] In some embodiments, the indicator determination module 402 is specifically used for: Based on the characteristics of internal force variation, the internal force variation and component weight of at least some components during the target time period are determined when each time-varying factor acts on the cable-stayed structure, and the internal force variation of each component is converted into stress variation. Based on the stress change and component weight, the total stress index of the component under the action of various time-varying factors is determined.

[0132] In some embodiments, the indicator determination module 402 is specifically used for: Based on the stress change, component weight, and stress upper limit threshold, the total stress index of the first component under the action of various time-varying factors is determined. Based on the stress change, component weight, and stress lower limit threshold, the total stress index of the second component under the action of various time-varying factors is determined. The minimum stress index between the first component and the second component is taken as the total stress index of the component.

[0133] In some embodiments, the indicator determination module 402 is specifically used for: For a component under the action of a time-varying factor, the difference between the stress change of the component and the upper limit threshold of stress is taken as the first residual stress. The first residual stress is divided into multiple stress intervals, and the first stress safety degree of the component is determined based on the first stress interval in which the stress change of the component is located. Based on the first stress safety factor and component weight, the total stress index of the first component under the action of various time-varying factors is determined.

[0134] In some embodiments, the indicator determination module 402 is specifically used for: For a component under the action of a time-varying factor, the difference between the stress change of the component and the lower stress threshold is taken as the second residual stress. The second residual stress is divided into multiple stress intervals, and the second stress safety degree of the component is determined based on the second stress interval in which the stress change of the component is located. Based on the second stress safety factor and component weight, the total stress index of the second component under the action of various time-varying factors is determined.

[0135] In some embodiments, the result generation module 403 is specifically used for: The total index of nodal displacement under the action of various time-varying factors and the influence of each time-varying factor on the nodal displacement are weighted and fused to obtain the first performance evaluation result of the cable-stayed structure in the target time period. The total stress index of the component under various time-varying factors and the influence of each time-varying factor on the internal force of the component are weighted and integrated to obtain the second performance evaluation result of the cable-stayed structure in the target time period.

[0136] In some embodiments, the result generation module 403 is further configured to: When the first performance evaluation result is lower than the first performance threshold, generate the first performance alarm information according to the alarm method corresponding to the first performance evaluation result; When the second performance evaluation result is lower than the second performance threshold, a second performance alarm message is generated according to the alarm method corresponding to the second performance evaluation result. Among them, the alarm method is used to characterize the importance of the performance evaluation results.

[0137] In some embodiments, the result generation module 403 is further configured to: Based on displacement and internal force variation characteristics, the displacement safety factor of each node and the stress safety factor of each component during the target time period are determined. A third performance alarm message is generated if one of the following conditions is met: The displacement safety factor of at least some nodes is lower than the first safety factor threshold; At least some components have a stress safety factor below the second safety factor threshold.

[0138] In this embodiment, the data processing device is presented in the form of a functional unit. Here, a unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that execute one or more software or fixed programs, and / or other devices that can provide the above functions.

[0139] Please see Figure 5 , Figure 5This is a schematic diagram of the structure of a computer device provided in an embodiment of this application, such as... Figure 5 As shown, the computer device includes one or more processors 10, memory 20, and interfaces for connecting the components, including high-speed interfaces and low-speed interfaces. The components communicate with each other via different buses and can be mounted on a common motherboard or otherwise installed as needed. The processors can process instructions executed within the computer device, including instructions stored in or on memory to display graphical information of a GUI on external input / output devices (such as display devices coupled to the interfaces). In some alternative implementations, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple computer devices can be connected, each providing some of the necessary operations (e.g., as a server array, a group of blade servers, or a multiprocessor system). Figure 5 Take a processor 10 as an example.

[0140] Processor 10 may be a central processing unit, a network processor, or a combination thereof. Processor 10 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The programmable logic device may be a complex programmable logic device (CAMP), a field-programmable gate array (FPGA), a general-purpose array logic (GDA), or any combination thereof.

[0141] The memory 20 stores instructions executable by at least one processor 10 to cause the at least one processor 10 to perform the method shown in the above embodiments.

[0142] The memory 20 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the computer device. Furthermore, the memory 20 may include high-speed random access memory and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some alternative embodiments, the memory 20 may optionally include memory remotely located relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0143] The memory 20 may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as flash memory, hard disk or solid-state drive; the memory 20 may also include a combination of the above types of memory.

[0144] This application provides a computer program product including computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the method of any embodiment of this application.

[0145] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. A data processing method, characterized by, The method includes: Obtain performance reference information, which characterizes the displacement variation characteristics of at least some nodes and the internal force variation characteristics of at least some components in the cable-stayed structure when various time-varying factors are applied to the cable-stayed structure. Based on the displacement change characteristics and the internal force change characteristics, the performance indicators of the cable-stayed structure are determined during the target time period. The performance indicators include the total nodal displacement and total component stress under the action of each time-varying factor, as well as the influence of each time-varying factor on the nodal displacement and component internal force. Based on the total nodal displacement index, the total component stress index, and the influence intensity, the performance evaluation results of the cable-stayed structure during the target time period are obtained.

2. The method of claim 1, wherein, The acquisition of performance reference information includes: Based on the time-varying characteristics of the multiple time-varying factors and the topological material information of the cable-stayed structure, a cable-stayed structure model is constructed; Run the cable-stayed structure model to obtain the mechanical variation characteristics of the cable-stayed structure; Based on the aforementioned mechanical change characteristics, the performance reference information is determined.

3. The method of claim 1, wherein, The determination of the performance indicators of the cable-stayed structure during the target time period based on the displacement change characteristics and the internal force change characteristics includes: Based on the displacement change characteristics, determine the actual displacement and node weight of at least some of the nodes during the target time period when each of the time-varying factors acts on the cable-stayed structure. Based on the actual displacement and the node weight, the total index of node displacement under the influence of each time-varying factor is determined.

4. The method of claim 3, wherein, The determination of the total node displacement index under the influence of each time-varying factor based on the actual displacement and the node weight includes: For one of the nodes under the action of one of the time-varying factors, the difference between the initial load displacement of the node and the displacement threshold is taken as the remaining displacement, and the remaining displacement is divided into multiple displacement intervals. Based on the target displacement interval where the actual displacement of the node is located, the displacement safety of the node is determined. Based on the displacement safety factor and the node weight, the total node displacement index under the influence of each time-varying factor is determined.

5. The method according to claim 1, characterized in that, The determination of the performance indicators of the cable-stayed structure during the target time period based on the displacement change characteristics and the internal force change characteristics includes: Based on the internal force variation characteristics, when each of the time-varying factors acts on the cable-stayed structure, the internal force variation and component weight of at least some of the components during the target time period are determined, and the internal force variation of each component is converted into stress variation. Based on the stress change and the component weight, the total stress index of the component under the action of each time-varying factor is determined.

6. The method according to claim 5, characterized in that, The determination of the overall stress index of the component under the influence of each time-varying factor based on the stress change and the component weight includes: Based on the stress change, the component weight, and the stress upper limit threshold, the total stress index of the first component under the action of each of the time-varying factors is determined. Based on the stress change, the component weight, and the lower stress threshold, the total stress index of the second component under the action of each of the time-varying factors is determined. The minimum stress index between the first component and the second component is taken as the total stress index of the component.

7. The method according to claim 6, characterized in that, The determination of the total stress index of the first component under the influence of each of the time-varying factors, based on the stress change, the component weight, and the stress upper limit threshold, includes: For one of the components under the action of one of the time-varying factors, the difference between the stress change of the component and the stress upper limit threshold is taken as the first residual stress, and the first residual stress is divided into multiple stress intervals. Based on the first stress interval in which the stress change of the component is located, the first stress safety degree of the component is determined. Based on the first stress safety factor and the component weight, the total stress index of the first component under the action of each of the time-varying factors is determined.

8. The method according to claim 6, characterized in that, The determination of the total stress index of the second component under the influence of each of the time-varying factors, based on the stress change, the component weight, and the lower stress threshold, includes: For one of the components under the action of one of the time-varying factors, the difference between the stress change of the component and the lower stress threshold is taken as the second residual stress, and the second residual stress is divided into multiple stress intervals. Based on the second stress interval in which the stress change of the component is located, the second stress safety degree of the component is determined. Based on the second stress safety factor and the component weight, the total stress index of the second component under the action of each of the time-varying factors is determined.

9. The method according to claim 1, characterized in that, The performance evaluation results of the cable-stayed structure during the target time period are obtained based on the total nodal displacement index, the total component stress index, and the influence magnitude, including: The total index of nodal displacement under the action of each time-varying factor is weighted and fused with the influence of each time-varying factor on the nodal displacement to obtain the first performance evaluation result of the cable-stayed structure in the target time period. The total stress index of the component under the action of each time-varying factor and the influence of each time-varying factor on the internal force of the component are weighted and fused to obtain the second performance evaluation result of the cable-stayed structure in the target time period.

10. The method according to claim 9, characterized in that, The method further includes: When the first performance evaluation result is lower than the first performance threshold, a first performance alarm message is generated according to the alarm method corresponding to the first performance evaluation result; When the second performance evaluation result is lower than the second performance threshold, a second performance alarm message is generated according to the alarm method corresponding to the second performance evaluation result; The alarm method is used to characterize the importance of the performance evaluation results.

11. The method according to claim 10, characterized in that, The method further includes: Based on the displacement change characteristics and the internal force change characteristics, the displacement safety factor of each node and the stress safety factor of each component during the target time period are determined, and a third performance alarm message is generated if one of the following conditions is met: The displacement safety factor of at least some nodes is lower than the first safety factor threshold; At least some components have a stress safety factor below the second safety factor threshold.

12. A data processing apparatus, characterized in that, The device includes: The information acquisition module is used to acquire performance reference information, which characterizes the displacement change characteristics of at least some nodes and the internal force change characteristics of at least some components in the cable-stayed structure when various time-varying factors are applied to the cable-stayed structure. The index determination module is used to determine the performance index of the cable-stayed structure in a target time period based on the displacement change characteristics and the internal force change characteristics. The performance index includes the total index of nodal displacement and the total index of component stress under the action of each time-varying factor, as well as the influence of each time-varying factor on nodal displacement and component internal force. The result generation module is used to obtain the performance evaluation results of the cable-stayed structure during the target time period based on the total nodal displacement index, the total component stress index, and the influence intensity.

13. A computer device, characterized in that, include: A memory and a processor are communicatively connected, the memory stores computer instructions, and the processor executes the computer instructions to perform the data processing method according to any one of claims 1 to 11.

14. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing the computer to perform the data processing method according to any one of claims 1 to 11.

Images