Bridge structure stress state analysis method and device and storage medium

Abstract

The invention provides a bridge structure stress state analysis method and device and a storage medium, and the method comprises the steps: carrying out the unit division of an integral bridge structure finite element model, traversing all divided units, and determining whether each unit comprises a key stress substructure; carrying out stress analysis on the first unit by adopting overall analysis based on the overall bridge structure finite element model to obtain a first analysis result; determining corresponding key stress parts according to stress characteristics of the key stress substructures, and determining boundary conditions required by modeling of a second unit according to actual measurement data acquired by corresponding monitoring sensors arranged at the corresponding key stress parts of the real bridge; performing unit division on the initial finite element model of the second unit, and inputting the boundary condition to obtain a second analysis result; and determining the stress state of the whole bridge structure in combination with the first analysis result and the second analysis result. By adopting the analysis method provided by the invention, the stress analysis can be more accurately and quickly carried out.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge structure stress analysis, and in particular to a bridge structure stress state analysis method, a bridge substructure stress state display method, a device and a storage medium. Background Art

[0002] The fundamental concept of bridge health monitoring is to monitor and evaluate the stress conditions of bridge structures, issuing early warning signals when bridges are exposed to unusual climate and traffic conditions, or when bridge operating conditions are abnormally severe. This provides a basis and guidance for bridge maintenance, repair, and management decisions. Bridge stress analysis primarily involves analyzing the stress, deformation, and stability of bridges under different loads. The stress state of a bridge is affected by a variety of factors, including the bridge's structural type, load type, and environmental factors. The basic systems of bridge structures can be divided into five categories: beam bridges, arch bridges, rigid frame bridges, cable-stayed bridges, and suspension bridges. Their stress characteristics vary significantly depending on the structural form.

[0003] The finite element method (FEM) is a commonly used numerical analysis method for solving various physical problems in engineering and science, and is also frequently applied to the stress analysis of bridge structures. Before performing FEM calculations, appropriate boundary conditions must be defined. Boundary conditions are constraints imposed on the boundaries of the computational domain to simulate real-world physical phenomena.

[0004] In the process of implementing the present invention, the inventors discovered that the prior art has at least the following problems:

[0005] When analyzing the stress state of existing bridge structures, common methods include finite element model simulation analysis and actual measurement analysis. The finite element method divides the structure to be analyzed into simple but interacting units. The internal forces and deformations are transmitted between the units through nodes. The structural system responds to external loads based on its own characteristic parameters as the result of the structural solution. In order to ensure computational efficiency, the division of structural units cannot be carried out indefinitely. Therefore, a holistic analysis method is generally adopted to preliminarily divide the structure into units according to certain rules, and analyze the overall stress conditions of the structure to balance accuracy and computational time. If the finite element model of the entire bridge structure is used for simulation analysis, there is a problem of inaccurate simulation analysis results. In particular, the analysis results will be more deviated when there are some complex stress locations in the bridge structure, such as structures with prominent stresses, combined structures with multiple subsystems working together, locations with multiple components working together, and structures that bear more than one component in different directions.

[0006] If these complex stress-bearing areas are modeled separately, the computational accuracy of the local analysis can be improved by refining the unit mesh. When modeling and analyzing local components, since they are separated from the overall structure, accurate boundary conditions need to be provided for modeling and analysis. Generally, the unit analytical results from the overall analysis results can be extracted as boundary conditions and applied to the local model. However, since the overall model analysis results are also analytical solutions, factors such as initial assumptions and material parameter deviations may cause deviations between the analytical solution and the actual stress state, thereby affecting the analysis results of local key components.

[0007] However, if we adopt actual bridge measurements, the workload will be enormous and implementation will be difficult in reality.

[0008] Therefore, a bridge structure stress state analysis method, device and storage medium are needed to at least partially solve the above technical problems. Summary of the Invention

[0009] In view of this, embodiments of the present invention provide a bridge structure stress state analysis method, device, and storage medium to solve at least one of the problems in the prior art.

[0010] In a first aspect, an embodiment of the present invention provides a method for analyzing the stress state of a bridge structure, the method comprising:

[0011] The finite element model of the entire bridge structure is divided into units, and all the units formed by the division are traversed to determine whether each unit contains a key load-bearing sub-structure. Units that do not contain a key load-bearing sub-structure are defined as the first unit, and units that contain a key load-bearing sub-structure are defined as the second unit. Among them, the key load-bearing sub-structure includes a combined structure with multiple subsystems that bear forces in a coordinated manner, a location with multiple components that bear forces in a coordinated manner, a structure that bears more than one force component in different directions, and a structure with a prominent local force.

[0012] Based on the finite element model of the entire bridge structure, a stress analysis is performed on the first unit using an overall analysis to obtain a first analysis result;

[0013] Determine the corresponding key stress-bearing locations based on the stress characteristics of the key stress-bearing substructures, and determine the boundary conditions required for modeling the second unit through measured data obtained from corresponding monitoring sensors arranged at the corresponding key stress-bearing locations of the actual bridge;

[0014] Performing unit division on the initial finite element model of the second unit, inputting the boundary conditions, and obtaining a second analysis result;

[0015] The stress state of the entire bridge structure is determined by combining the first analysis results and the second analysis results.

[0016] In a second aspect, an embodiment of the present invention further provides a bridge structure stress state analysis device, the analysis device comprising:

[0017] a memory for storing computer-executable instructions;

[0018] The processor is used to implement the analysis method of the above technical solution when executing the computer executable instructions stored in the memory.

[0019] In a third aspect, an embodiment of the present invention further provides a storage medium storing computer instructions, wherein the computer instructions are used to enable the computer to execute the analysis method of the above technical solution.

[0020] According to the analysis method of the embodiment of the present invention, firstly, the overall analysis is performed based on the finite element model of the overall bridge structure to determine whether each unit formed by the division contains a key load-bearing sub-structure; for the first unit that does not contain a key load-bearing sub-structure, the finite element model of the overall bridge structure can be directly used to perform a load analysis to obtain a first analysis result; for the relatively complex second unit that contains a key load-bearing sub-structure, a separate model is built for a refined analysis. In order to obtain the boundary conditions required for modeling the second unit, the measured data obtained by arranging corresponding monitoring sensors at the corresponding key load-bearing parts of the actual bridge is determined; then the boundary conditions are input to obtain a second analysis result; finally, the first analysis result and the second analysis result are combined to determine the stress state of the entire bridge structure; the analysis method of the present invention can perform a more accurate and faster load analysis of the entire bridge structure.

[0021] Additional advantages, objects, and features of the present invention will be set forth in part in the following description and will become apparent to those skilled in the art upon examination of the following or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained by the structures particularly pointed out in the description and drawings.

[0022] Those skilled in the art will understand that the purposes and advantages that can be achieved by the present invention are not limited to the above specific descriptions, and the above and other purposes that can be achieved by the present invention will be more clearly understood based on the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are intended to provide a further understanding of the present invention, constitute a part of this application, and do not constitute a limitation of the present invention. The components in the drawings are not drawn to scale, but are merely for the purpose of illustrating the principles of the present invention. To facilitate the illustration and description of certain portions of the present invention, corresponding portions in the drawings may be exaggerated, that is, may be larger than other components in an exemplary device actually manufactured according to the present invention. In the drawings:

[0024] Figure 1 is a flow chart of an analysis method according to one embodiment of the present invention;

[0025] Figure 2 is a flow chart of an analysis method according to another embodiment of the present invention;

[0026] Figure 3 is a flowchart of an analysis method according to another embodiment of the present invention;

[0027] Figure 4 A schematic diagram of a suspension overlap area of a coordinated system of inclined-stayed cables in an analysis method according to an embodiment of the present invention;

[0028] Figure 5 A schematic diagram of a monitoring arrangement scheme for the overlapped area of a coordinated cable-stayed system in an analysis method according to an embodiment of the present invention;

[0029] Figure 6 Schematic diagram of monitoring boundary parameters of the cable-stayed cable cooperative system's overlapped area in an analysis method according to an embodiment of the present invention;

[0030] Figure 7 is a schematic diagram of an analysis device according to an embodiment of the present invention;

[0031] Figure 8 FIG. 1 is a schematic diagram of an analysis system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0033] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, the accompanying drawings only show structures and / or processing steps closely related to the solutions according to the present invention, while other details that are not closely related to the present invention are omitted.

[0034] It should be emphasized that the term "include / comprises" when used herein refers to the existence of features, elements, steps or components, but does not exclude the existence or addition of one or more other features, elements, steps or components.

[0035] It should also be noted that, unless otherwise specified, the term "connection" herein may refer not only to a direct connection but also to an indirect connection involving an intermediate.

[0036] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals represent the same or similar components, or the same or similar steps.

[0037] First, refer to Figure 1A bridge structure stress state analysis method 100 according to an embodiment of the present application is described. Figure 1 As shown, the analysis method 100 may include step S110 and step S150. Specifically, as follows:

[0038] In step S110, the finite element model of the entire bridge structure is divided into units, and all units formed by the division are traversed to determine whether each unit contains a key force-bearing sub-structure; the unit that does not contain the key force-bearing sub-structure is defined as the first unit, and the unit that contains the key force-bearing sub-structure is defined as the second unit; wherein, the key force-bearing sub-structure includes a combined structure in which multiple subsystems are synergistically stressed, a location in which multiple components are synergistically stressed, a structure that bears more than one component force in different directions, and a structure with locally prominent force.

[0039] In step S120, a stress analysis is performed on the first unit using an overall analysis based on the overall bridge structure finite element model to obtain a first analysis result.

[0040] In step S130, the corresponding key stress-bearing parts are determined according to the stress characteristics of the key stress-bearing substructure, and the boundary conditions required for modeling the second unit are determined by obtaining measured data from corresponding monitoring sensors arranged at the corresponding key stress-bearing parts of the actual bridge.

[0041] In step S140, the initial finite element model of the second unit is divided into units, the boundary conditions are input, and a second analysis result is obtained.

[0042] In step S150, the stress state of the entire bridge structure is determined by combining the first analysis result and the second analysis result.

[0043] In the embodiment of the present application, first, an overall analysis is performed based on the finite element model of the overall bridge structure to determine whether each unit formed by the division contains a key load-bearing substructure; for the first unit that does not contain a key load-bearing substructure, the finite element model of the overall bridge structure can be directly used to perform a load analysis to obtain a first analysis result; for the relatively complex second unit that contains a key load-bearing substructure, a separate model is modeled and refined for analysis. In order to obtain the boundary conditions required for modeling the second unit, the measured data obtained by arranging corresponding monitoring sensors at the corresponding key load-bearing parts of the actual bridge is determined; then the boundary conditions are input to obtain a second analysis result; and finally, the first analysis result and the second analysis result are combined to determine the stress state of the entire bridge structure.

[0044] From the description of the above process, it can be seen that according to the analysis method 100 of the embodiment of the present application, reliable measured data is used to obtain the boundary conditions required for modeling the second unit, so as to obtain accurate simulation calculation results of the stress state of the second unit, and combined with the first analysis results to realize the stress analysis of the entire bridge structure, the entire analysis process is more accurate and faster.

[0045] Among them, Figure 1 Steps S110 to S150 are shown to be performed sequentially, which is only an example. It is understood that the order of steps S120 and S130 is not limited.

[0046] The following will be combined Figure 1 The contents of the above steps of the analysis method 100 according to the embodiment of the present application are described in detail.

[0047] In an embodiment of the present application, in step S110, the finite element model of the overall bridge structure is divided into units, all units formed by the division are traversed, and it is determined whether each unit contains a key force-bearing sub-structure; the unit that does not contain the key force-bearing sub-structure is defined as the first unit, and the unit that contains the key force-bearing sub-structure is defined as the second unit; wherein, the key force-bearing sub-structure includes a combined structure in which multiple subsystems are synergistically stressed, a part in which multiple components are synergistically stressed, a structure that bears more than one component force in different directions, and a structure with locally protruding force.

[0048] Specifically, it can be understood that before performing this step, a finite element model of the entire bridge structure needs to be constructed first.

[0049] Existing technical means can be used to construct the finite element model of the overall bridge structure. For example, various finite element modeling software can be used, such as Midas, Bridge Doctor, Sap2000 and other FEA software to construct the finite element model of the overall bridge structure.

[0050] After the overall bridge structure finite element model is constructed, it is divided into units. All units formed by the division are then traversed to determine whether each unit contains key load-bearing substructures. Key load-bearing substructures include combined structures with multiple subsystems (two or more subsystems) that are synergistically loaded, locations with multiple components (two or more components) that are synergistically loaded, structures that bear multiple or more force components in different directions, and structures with prominent local loads.

[0051] By analyzing whether each unit contains a key load-bearing substructure, we can understand the complexity of the load on each unit. Units with relatively simple load conditions that do not contain a key load-bearing substructure are defined as first units. Units that contain a key load-bearing substructure are defined as second units.

[0052] In an embodiment of the present application, in step S120 , a stress analysis is performed on the first unit using an overall analysis based on the overall bridge structure finite element model to obtain a first analysis result.

[0053] Specifically, in order to improve the efficiency of bridge structure stress analysis, while ensuring a certain degree of analysis accuracy, since the stress condition of the first unit is relatively simple, the overall bridge structure finite element model can be directly used to perform stress analysis on the first unit using overall analysis to obtain the first analysis result of the stress state result of the first unit.

[0054] In an embodiment of the present application, in step S130, the corresponding key stress-bearing parts are determined according to the stress characteristics of the key stress-bearing sub-structure, and the boundary conditions required for modeling the second unit are determined by obtaining the measured data from the corresponding monitoring sensors arranged at the corresponding key stress-bearing parts of the actual bridge.

[0055] Specifically, see Figure 4 Taking the cable-stayed and suspension bridge system as an example, as a new type of bridge system, the industry is still unclear about the key control indicators, stress conditions in the overlap zone, and distribution patterns. Therefore, it is necessary to determine the key load-bearing substructures through overall analysis and then analyze the stress conditions of these key load-bearing substructures through detailed modeling. Generally, FEA software such as Midas and Bridge Doctor is used for overall finite element modeling and analysis. The stress and deformation results are analyzed to determine that the key load-bearing substructure of the entire bridge is the cable-stayed overlap zone.

[0056] The analysis of the stress characteristics of the suspension overlap area shows that the key stress-bearing parts are the main beam, suspension cables and inclined cables. Therefore, taking the suspension overlap area of the bridge as the calculation target and considering the parameters required for its modeling, we first designed the relevant sensor layout plan for the corresponding parts of the actual bridge, including the arrangement of cable force sensors, stress sensors, displacement sensors and shear force sensors at the corresponding locations. Figure 5 As shown in the figure, data is collected in the suspension overlap area under specific working conditions. For example, when the main beam is subjected to dynamic and static loading of a standard lane, the cable forces of the suspension cables and inclined cables in the suspension overlap area, as well as the stress, displacement and shear force of the main beam under the corresponding working conditions are obtained.

[0057] The boundary conditions required for modeling the sling overlap area are determined based on the cable forces of the slings and inclined cables in the sling overlap area, as well as the stress, displacement and other data of the main beam under the corresponding working conditions.

[0058] The boundary conditions required for modeling the second unit are determined based on the measured data from the monitoring sensors, generally in the following ways:

[0059] The displacement data in the boundary conditions required for the second unit modeling directly adopts the displacement data in the measured data of the monitoring sensor.

[0060] The boundary load L and equivalent support load in the boundary conditions required for modeling the second element are obtained in the following way:

[0061]

[0062] L=∫σ(x)dx

[0063] Where x represents the load distribution variable, σ(x) represents the actual stress distribution function, and σ 实测 represents the measured stress, σ 模拟 Represents the numerically simulated stress of the overall analysis section.

[0064] The boundary loads are input into the initial finite element model of the second element to obtain the equivalent support loads.

[0065] Continuing with the above-mentioned suspended overlap zone as an example, in order to obtain the boundary conditions of the suspended overlap zone, the measured cable force and displacement data can be used directly, and then directly input as input data into the initial finite element model constructed corresponding to the suspended overlap zone.

[0066] The boundary load L and equivalent support load in the boundary conditions required for modeling the suspended overlap area need to be converted with the stress distribution of the cross section under the corresponding working conditions in the overall calculation model. Figure 6 , the stress results must be converted to the actual stress distribution function σ(x) based on the cross-sectional stress distribution. Finally, the corresponding support loads are converted based on the boundary condition settings for the suspended overlap area model. The support loads can be obtained by inputting the boundary load L into the initial finite element model. Alternatively, the support loads can be obtained by inputting the reaction force F1 or M1 into the initial finite element model as needed. (Here, the reaction force F1 can refer to the shear force V1 or the axial force N1, and M1 represents the cross-sectional bending moment.)

[0067] in,

[0068]

[0069] L=∫σ(x)dx

[0070] F1=∫σ(x,y)dxdy

[0071] M1=∫σ(x,y)ydxdy

[0072] Among them, when the calculation boundary condition is a line load, x represents the one-dimensional distribution variable of the quantity, and σ(x) represents the actual stress distribution function along the x direction; when it is a surface load, x and y represent the variables of the two-dimensional distribution of the quantity, σ(x,y) represents the actual stress distribution function along the x and y directions; y represents the distance of the stress from the neutral axis of the section.

[0073] Of course, the initial finite element model corresponding to the suspension overlap area can be pre-constructed using finite element modeling software, and the initial finite element model can also be constructed using existing technical means, for example, various finite element modeling software, such as Midas, Bridge Doctor, Sap2000 and other FEA software.

[0074] In an embodiment of the present application, in step S140 , the initial finite element model of the second unit is divided into units, boundary conditions are input, and a second analysis result is obtained.

[0075] Specifically, before inputting the boundary conditions into the initial finite element model of the second unit, the initial finite element model of the second unit is further divided into units to achieve refined analysis. Then the boundary conditions are input into the initial finite element model of the second unit. Continuing with the example of the suspension overlap area, the boundary conditions within the suspension overlap area are input into the corresponding positions, where the measured value of the cable force is the concentrated load at the corresponding position of the main beam, and the section deflection value is the constrained displacement of the boundary support. In addition to setting the boundary equivalent support at the section, the support load under the corresponding working condition must also be applied. Finally, the second analysis result of the stress state result of the second unit is output through the model.

[0076] In an embodiment of the present application, in step S150 , the first analysis result and the second analysis result are combined to determine the stress state of the entire bridge structure.

[0077] Finally, by combining the first analysis results and the second analysis results, the stress state of the entire bridge structure can be determined.

[0078] In finite element analysis software, a result cloud plot is a data visualization technique used to display structural analysis results, such as the spatial distribution of physical quantities such as stress, strain, displacement, and temperature. Cloud plots use contour lines or color changes to illustrate the changes in result items across the model. This display method helps users intuitively understand the spatial distribution of analysis results. Cloud plots are not only used to display static analysis results, but can also be used to dynamically display results that change over time, such as in transient thermal analysis or dynamic structural analysis. These dynamic cloud plots can be animated to more intuitively demonstrate the distribution of physical quantities over time.

[0079] Therefore, based on the first analysis results and the second analysis results, especially the second analysis results, the mechanical, deformation and other results are output in real time, and a cloud map result that can be dynamically displayed is generated on the surface of the structure, which is convenient for real-time observation of the stress condition of the structure. When the stress index exceeds the specified limit, a real-time warning can also be issued.

[0080] Furthermore, in order to realize the real-time and rapid display of the state parameters of the key force-bearing substructure, the results of the refined modeling calculation are too cumbersome and time-consuming. Therefore, the initial model corresponding to the second unit is calculated for the first time, and periodically or on-demand update. During this period, the rapid display of the calculation results is achieved by establishing a rapid response conversion of the influence matrix.

[0081] Specifically, refer to Figure 2 and Figure 3, based on the initial simulation calculation results in the second analysis results, the influence matrix between the associated measured data and the state parameters of the key force-bearing sub-structure is obtained.

[0082] {F}=[C]{B}

[0083] {F}={σ1,σ2,…σ i …,σ m} T

[0084] {B}={p1,p2,…p j …,p n} T

[0085]

[0086] Among them, {F} represents the response parameter change vector of the key load-bearing substructure control section, {B} represents the measured data change vector, [C] is the influence matrix between the key load-bearing substructure state parameters and the measured data; the influence matrix coefficient It represents the change in state parameters caused by a unit change in boundary conditions.

[0087] Then, the measured data and the influence matrix are updated simultaneously on a regular basis or as needed to obtain the time history results of the state parameters of the corresponding key load-bearing sub-structures to achieve real-time and rapid display.

[0088] Of course, it is also necessary to obtain the response parameter change vector {F} of the key load-bearing substructure control section in advance, including:

[0089] {F}1={F}+{F}0

[0090] Where {F}0 represents the initial response parameter vector of the key load-bearing substructure control section, and {F}1 represents the absolute response parameter vector of the key load-bearing substructure control section.

[0091] Continuing with the above-mentioned suspended overlapping area as an example, refer to Figure 6 Since the stress state of the substructure (suspended and overlapped area) can be quickly judged by some state parameters, some response parameters are selected for analysis and calculation. The calculation process using the influence matrix is as follows:

[0092] {F}=[C]{B}

[0093] {F}={ω1,ω2,ω3,ω4} T

[0094] {B}={T1,T2,T3,P1,P2,P3,M1',V1',N1',M1,V1,N1} T

[0095]

[0096] Where {F} represents the response parameter change vector of the substructure control section. Here, it is assumed that the deflections at four locations along the longitudinal direction of the bridge are selected as structural control parameter indicators, and {B} represents the boundary parameter change vector obtained by actual measurement.

[0097] In the above calculations, since the parameters sensed by the sensor are mostly state changes after the start of monitoring, the elements in {F} and {B} are unified as parameter changes. In order to obtain the substructure state, it should be added to the initial state. The calculation process is as follows:

[0098] {F}1={F}+{F}0

[0099] Where {F}0 represents the initial response parameter vector of the substructure control section, and {F}1 represents the absolute response parameter vector of the substructure control section.

[0100] The initial response parameter vector {F}0 can be obtained through finite element numerical analysis or by using monitoring data during the construction of the structure.

[0101] Dynamic display can automatically call the calculation results through program code compilation to generate the corresponding structural calculation result cloud map for visual display. The relevant calculation modules can be embedded in control systems such as construction monitoring systems and health monitoring systems for application.

[0102] Based on the above description, the analysis method 100 according to the embodiment of the present application mainly includes four parts: overall modeling analysis, acquisition of measured data, sub-structure refined modeling and real-time rapid dynamic display. It realizes multi-scale analysis of measured data, simulation and visual display, and can analyze the stress state of the bridge structure more quickly and accurately. It also solves the problem of taking boundary condition values for sub-structure model analysis and calculation, and provides a good result display method, which has good engineering practical value.

[0103] refer to Figure 7 The analysis device 200 for implementing the analysis method according to the embodiment of the present application includes a processor 210 and a memory 220. The analysis device 200 may include one or more processors 210 and one or more memories 220. The memory 220 stores an executable program executed by the processor 210. When the executable program is executed by the processor 210, the processor 210 executes the analysis method 100 according to the embodiment of the present application described above.

[0104] The processor 210 may be a central processing unit (CPU) or other processing units having data processing capabilities and / or instruction execution capabilities.

[0105] The memory 220 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may, for example, include random access memory (RAM) and / or cache memory (cache), etc. The non-volatile memory may, for example, include read-only memory (ROM), a hard disk, a flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 210 may run the program instructions to implement the client functions and / or other desired functions in the embodiments of the present application described herein (implemented by the processor). Various applications and various data may also be stored in the computer-readable storage medium, such as various data used and / or generated by the application.

[0106] The analysis device 200 may also include an input device and an output device, and these components are interconnected via a bus system and / or other forms of connection mechanisms. Figure 7 The components and structures of the analysis device 200 shown are merely exemplary and non-limiting. The analysis device 200 may also have other components and structures as needed.

[0107] The input device may be a device used by a user to input instructions, and may include one or more of a keyboard, a mouse, a microphone, a touch screen, etc. In addition, the input device may also be any interface for receiving information.

[0108] The output device may output various information (eg, images or sounds) to the outside (eg, a user), and may include one or more of a display, a speaker, etc. In addition, the output device may also be any other device with an output function.

[0109] Exemplarily, the example analysis device 200 for implementing the analysis method 100 according to the embodiment of the present application can be applied to terminal devices (such as mobile phones), tablet computers, laptops, ultra-mobile personal computers (UMPCs), handheld computers, netbooks, personal digital assistants (PDAs), wearable devices (such as smart watches, smart glasses or smart helmets, etc.), augmented reality (AR), virtual reality (VR) devices, smart home devices, car computers and other electronic devices. The embodiments of the present application do not impose any restrictions on this.

[0110] Those skilled in the art can understand the specific operations of the analysis device 200 for implementing the analysis method 100 according to the embodiment of the present application in combination with the contents described above. For the sake of brevity, the specific details are not repeated here, and only some main operations of the processor 210 are described.

[0111] In one embodiment of the present application, when the executable program is executed by the processor 210, the processor 210 executes the following steps: dividing the finite element model of the overall bridge structure into units, traversing all units formed by the division, and determining whether each unit contains a key force-bearing sub-structure; defining the unit that does not contain the key force-bearing sub-structure as the first unit, and defining the unit that contains the key force-bearing sub-structure as the second unit; wherein the key force-bearing sub-structure includes a combined structure in which multiple subsystems are collaboratively stressed, a part in which multiple components are collaboratively stressed, a structure that bears more than one component force in different directions, and a structure that is locally stressed; based on the finite element model of the overall bridge structure, a force analysis is performed on the first unit using an overall analysis to obtain a first analysis result; according to the force characteristics of the key force-bearing sub-structure, the corresponding key force-bearing part is determined, and the boundary conditions required for modeling the second unit are determined by obtaining the measured data obtained by the corresponding monitoring sensors arranged at the corresponding key force-bearing parts of the actual bridge; dividing the initial finite element model of the second unit into units, inputting the boundary conditions, and obtaining a second analysis result; and determining the force state of the entire bridge structure by combining the first analysis result and the second analysis result.

[0112] The above exemplary illustrates the analysis method 100 according to the embodiment of the present application. Figure 8 The analysis system 300 provided in another aspect of an embodiment of the present application is described.

[0113] Reference Figure 8 The following describes an example analysis system 300 for implementing the analysis method of the embodiment of the present application. The analysis system 300 may include a traversal module 310, a first obtaining module 320, a first determining module 330, a second obtaining module 340, and a second determining module 350.

[0114] The traversal module 310 is used to: divide the finite element model of the overall bridge structure into units, traverse all the units formed by the division, and determine whether each unit contains a key force-bearing sub-structure; define the unit that does not contain the key force-bearing sub-structure as the first unit, and define the unit that contains the key force-bearing sub-structure as the second unit; wherein the key force-bearing sub-structure includes a combined structure in which multiple subsystems are synergistically stressed, a location in which multiple components are synergistically stressed, a structure that bears more than one component force in different directions, and a structure with locally prominent force.

[0115] The first obtaining module 320 is configured to perform a stress analysis on the first unit by using an overall analysis based on the overall bridge structure finite element model to obtain a first analysis result.

[0116] The first determination module 330 is used to determine the corresponding key stress-bearing parts according to the stress characteristics of the key stress-bearing sub-structure, and determine the boundary conditions required for modeling the second unit through the measured data obtained by the corresponding monitoring sensors arranged at the corresponding key stress-bearing parts of the actual bridge.

[0117] The second obtaining module 340 is used to perform unit division on the initial finite element model of the second unit, input the boundary conditions, and obtain a second analysis result.

[0118] The second determination module 350 is used to determine the stress state of the entire bridge structure by combining the first analysis result and the second analysis result.

[0119] The analysis system 300 proposed in the embodiment of the present invention can realize rapid and accurate analysis of the entire bridge structure.

[0120] In addition, according to an embodiment of the present application, the present application further provides a storage medium on which a computer program is stored, and when the computer program is executed by a processor, it is used to perform the corresponding steps of the analysis method 100 of the embodiment of the present application. The storage medium may include, for example, a memory card of a smart phone, a storage component of a tablet computer, a hard disk of a personal computer, a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a portable compact disk read-only memory (CD-ROM), a USB memory, or any combination of the above storage media. The computer-readable storage medium may be any combination of one or more computer-readable storage media.

[0121] In addition, according to an embodiment of the present application, the present application also provides a computer program product, including computer instructions, which, when executed by a processor, implement the steps of the analysis method of the embodiment of the present application.

[0122] Although example embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above example embodiments are merely illustrative and are not intended to limit the scope of the present application. Various changes and modifications may be made therein by those skilled in the art without departing from the scope and spirit of the present application. All such changes and modifications are intended to be included within the scope of the present application as required by the appended claims.

[0123] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0124] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units described is merely a logical function division. In actual implementation, other division methods may be used, such as combining or integrating multiple units or components into another device, or ignoring or not performing some features.

[0125] Furthermore, those skilled in the art will appreciate that although some embodiments described herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are intended to be within the scope of this application and to form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

[0126] It should be noted that the above embodiments illustrate rather than limit the present application, and that a person skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbols placed between brackets should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present application may be implemented by means of hardware comprising several different elements and by means of appropriately programmed computers. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names.

[0127] The above description is merely a specific embodiment or illustration of a specific embodiment of the present application, and the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. The scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A bridge structure stress state analysis method, characterized in that: The analysis method comprises: The finite element model of the entire bridge structure is divided into units, and all the units formed by the division are traversed to determine whether each unit contains a key load-bearing sub-structure. Units that do not contain a key load-bearing sub-structure are defined as the first unit, and units that contain a key load-bearing sub-structure are defined as the second unit. Among them, the key load-bearing sub-structure includes a combined structure with multiple subsystems that bear forces in a coordinated manner, a location with multiple components that bear forces in a coordinated manner, a structure that bears more than one force component in different directions, and a structure with a prominent local force. Based on the finite element model of the entire bridge structure, a stress analysis is performed on the first unit using an overall analysis to obtain a first analysis result; Determine the corresponding key stress-bearing locations based on the stress characteristics of the key stress-bearing substructures, and determine the boundary conditions required for modeling the second unit through measured data obtained from corresponding monitoring sensors arranged at the corresponding key stress-bearing locations of the actual bridge; Performing unit division on the initial finite element model of the second unit, inputting the boundary conditions, and obtaining a second analysis result; The stress state of the entire bridge structure is determined by combining the first analysis results and the second analysis results.

2. The analysis method according to claim 1, characterized in that It also includes a quick display of the state parameters of the key force-bearing sub-structure, including the following steps: Obtaining an influence matrix between the associated measured data and the state parameters of the key force-bearing substructure based on the initial simulation calculation results in the second analysis results; Update the measured data and influence matrix simultaneously regularly or on demand to obtain the time history results of the state parameters of the corresponding key load-bearing sub-structures for real-time and rapid display.

3. The analysis method according to claim 2, characterized in that The obtaining of the influence matrix between the associated measured data and the state parameters of the key force-bearing substructures specifically includes: {F}=[C]{B} {F}={σ1,σ2,...σ i ...,s m } T {B}={p1,p2,…p j …,p n } T Among them, {F} represents the response parameter change vector of the key load-bearing substructure control section, {B} represents the measured data change vector, [C] is the influence matrix between the key load-bearing substructure state parameters and the measured data; the influence matrix coefficient It represents the change in state parameters caused by a unit change in boundary conditions.

4. The analysis method according to claim 3, characterized in that It also includes obtaining the response parameter change vector {F} of the key force-bearing substructure control section, specifically including: {F}1={F}+{F}0 Where {F}0 represents the initial response parameter vector of the key load-bearing substructure control section, and {F}1 represents the absolute response parameter vector of the key load-bearing substructure control section.

5. The analysis method according to claim 1, characterized in that The boundary conditions required for modeling the second unit include boundary loads, displacements and equivalent support loads of key load-bearing substructures.

6. The analysis method according to claim 5, characterized in that Determine the boundary conditions required for modeling the second unit based on the measured data from the monitoring sensors. Specifically, The displacement data in the boundary conditions required for the second unit modeling are directly adopted from the displacement data measured by the monitoring sensor; The boundary load L and equivalent support load in the boundary conditions required for modeling the second element are obtained in the following way: L=∫σ(x)dx Where x represents the load distribution variable, σ(x) represents the actual stress distribution function, and σ 实测 represents the measured stress, σ 模拟 Represents the numerically simulated stress of the overall analysis section; The boundary loads are input into the initial finite element model of the second element to obtain the equivalent support loads.

7. The display method according to claim 1, characterized in that: The method also includes pre-building an initial finite element model corresponding to the second unit using finite element modeling software.

8. The display method according to claim 1, characterized in that: It also includes generating a dynamically displayable cloud map result on the surface of the corresponding structure for the first analysis result and / or the second analysis result, so as to facilitate the real-time observation of the stress condition of the key stress-bearing sub-structure.

9. A bridge structure stress state analysis device, characterized in that: The analysis device comprises: a memory for storing computer-executable instructions; The processor is configured to implement the analysis method according to any one of claims 1 to 8 when executing the computer-executable instructions stored in the memory.

10. A storage medium storing computer instructions, wherein: The computer instructions are used to cause the computer to execute the analysis method according to any one of claims 1 to 8.

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