Structural global stress monitoring method and device, equipment and storage medium

Abstract

The invention discloses a structure global stress monitoring method and device, equipment and a storage medium. The structure global stress monitoring method comprises the steps that a finite element model of a structure is determined; deducing the equivalent load of the structure based on the measured value of each position measuring point on the structure and the observed value of the corresponding position measuring point on the finite element model; the equivalent load of the structure is applied to the finite element model, and the stress of all components of the structure is obtained through calculation; and comparing the deviation between the actually measured stress of each position measuring point and the calculated stress of the component at the corresponding position in the structure, and giving out an early warning when the deviation value is greater than a set value. The stress of all components of the structure can be obtained, the comprehensiveness of safety monitoring is greatly improved, and potential safety hazards are reduced; and meanwhile, the deviation between the actually measured stress of each position measuring point and the calculated stress of the component at the corresponding position in the structure is compared, and the deviation value is judged and early warned, so that problems can be found in time at an early stage, and assistance is provided for site construction.

Description

Technical Field

[0001] The present application relates to the technical field of structural safety monitoring, and in particular to a method, device, equipment and storage medium for monitoring global structural stress. Background Art

[0002] In all types of engineering practices, health monitoring is crucial to ensure the safety and stability of structures throughout their lifecycles. Whether it's large-scale infrastructure like bridges, buildings, and dams, or heavy machinery and equipment, they are subject to a variety of complex and dynamically changing loads from the environment, traffic, and operations during construction and use. Therefore, real-time and accurate safety monitoring of these structures is crucial for preventing accidents and ensuring the safety of people and property.

[0003] In related technologies, the following technical approach is commonly used for structural safety monitoring: First, analysis is performed based on design loads using methods such as finite element models to identify theoretically critical components (usually those with the highest stress or the most importance). Subsequently, a fixed warning threshold is set based on the material's allowable stress or relevant design specifications. Finally, sensors (such as stress sensors) are deployed on these identified critical components. During the actual operation of the structure, the values ​​measured by the sensors are compared with the preset threshold. When the measured value exceeds the threshold, an alarm is triggered.

[0004] However, the above traditional methods have the following two major defects in practical applications: (1) The actual load-bearing conditions of a structure often differ significantly from the design loads used in the initial analysis. The distribution, magnitude, and mode of action of the actual loads are dynamic, which may result in the actual maximum stress point (i.e., the true danger point) in the structure not being the critical component predicted by the theoretical analysis. Therefore, installing sensors only at the predicted critical points will create monitoring blind spots, leaving serious safety hazards.

[0005] (2) When the stress in certain parts of the structure reaches a preset fixed alarm threshold, it usually indicates that the part is close to the limit of its bearing capacity and the structure may be in a relatively dangerous state. This "after-the-fact" alarm method is difficult to achieve early warning, and the time and space reserved for on-site preventive or remedial measures are extremely limited, which greatly reduces the guiding role of safety monitoring in actual projects.

[0006] Therefore, it is necessary to design a new structural global stress monitoring method to overcome the above problems. Summary of the Invention

[0007] The present application provides a structural global stress monitoring method, device, equipment and storage medium, which can solve the technical problems existing in related technologies that easily cause monitoring blind spots and greatly reduce the guidance of safety monitoring for actual projects.

[0008] In a first aspect, an embodiment of the present application provides a method for monitoring global structural stress, the method comprising: Determine the finite element model of the structure; Based on the measured values ​​of each measuring point on the structure and the observed values ​​of the corresponding measuring points on the finite element model, the equivalent load of the structure is derived; Apply the equivalent load of the structure to the finite element model and calculate the stress of all components of the structure; Compare the deviation between the measured stress at each measuring point and the calculated stress of the corresponding component in the structure, and issue an early warning when the deviation value is greater than the set value.

[0009] In conjunction with the first aspect, in one embodiment, deducing the equivalent load of the structure based on the measured values ​​of each position measuring point on the structure and the observed values ​​of the corresponding position measuring points on the finite element model includes: Construct a relationship matrix between the measured values ​​of each measuring point on the structure, the observed values ​​of the corresponding measuring points on the finite element model and the equivalent load of the structure; Based on the measured values ​​of each measuring point on the structure and the observed values ​​of the corresponding measuring points on the finite element model, the equivalent load of the structure is determined by matrix inversion.

[0010] In combination with the first aspect, in one embodiment, the measured value is a stress measured value or a displacement measured value.

[0011] In conjunction with the first aspect, in one embodiment, determining a finite element model of the structure includes: Build an initial finite element model of the structure based on the design drawings; Apply loads to the initial finite element model and record the response; The initial finite element model is modified based on the deviation between the response on the initial finite element model and the actual response on the structure until the deviation between the responses is less than a preset value, thereby obtaining a finite element model of the structure.

[0012] In conjunction with the first aspect, in one embodiment, applying a load to the initial finite element model and recording a response includes: Using structural top-test bridges, during which loads and corresponding actual responses are collected; Apply the corresponding loads collected during the trial jacking to the initial finite element model and record the response of the initial finite element model.

[0013] In combination with the first aspect, in one embodiment, after determining the finite element model of the structure, the method further includes: fixing the stiffness matrix of the finite element model.

[0014] In combination with the first aspect, in one embodiment, after applying the equivalent load of the structure to the finite element model and calculating the stress of all components of the structure, it also includes: judging whether the calculated stress of the components of the structure without measuring points exceeds the set stress value, and if so, issuing an early warning.

[0015] In conjunction with the first aspect, in one embodiment, before deriving the equivalent load of the structure, the following steps are further included: The measuring points at each position on the structure are numbered in sequence, and the corresponding measuring points on the finite element model are numbered at the same time, so that the measuring points on the finite element model correspond to the numbers of the measuring points at each position on the structure.

[0016] In a second aspect, an embodiment of the present application provides a structural global stress monitoring device, the structural global stress monitoring device comprising: a model building module for determining a finite element model of a structure; The equivalent load calculation module is used to derive the equivalent load of the structure based on the measured values ​​of each measuring point on the structure and the observed values ​​of the corresponding measuring points on the finite element model; Stress calculation module, which is used to apply the equivalent load of the structure to the finite element model and calculate the stress of all components of the structure; The early warning module is used to compare the deviation between the measured stress at each measuring point and the calculated stress of the component at the corresponding position in the structure, and issue an early warning when the deviation value is greater than the set value.

[0017] In a third aspect, an embodiment of the present application provides a structural global stress monitoring device, which includes a processor, a memory, and a structural global stress monitoring program stored in the memory and executable by the processor, wherein when the structural global stress monitoring program is executed by the processor, the steps of the above-mentioned structural global stress monitoring method are implemented.

[0018] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a structural global stress monitoring program is stored, wherein when the structural global stress monitoring program is executed by a processor, the steps of the above-mentioned structural global stress monitoring method are implemented.

[0019] The beneficial effects of the technical solutions provided in the embodiments of the present application include: The equivalent load of the structure can be derived through the measured values ​​of the measuring points at various positions on the structure and the observed values ​​of the measuring points at corresponding positions on the finite element model; then the equivalent load is applied to the finite element model to obtain the stress of all components of the structure, thereby greatly improving the comprehensiveness of safety monitoring, less likely to cause monitoring blind spots, and reducing safety hazards; at the same time, by comparing the deviation between the measured stress of the measuring points at various positions and the calculated stress of the components at corresponding positions in the structure, the deviation value is judged and an early warning is issued, which can detect problems in a timely manner at an early stage and provide assistance to actual on-site construction, solving the technical problems existing in related technologies that easily cause monitoring blind spots and greatly reduce the guidance of safety monitoring for actual projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a flow chart of an embodiment of a method for monitoring global stress of a structure according to the present application; Figure 2 This is a flow chart of another embodiment of the method for monitoring global structural stress of the present application; Figure 3 This is a schematic diagram of the hardware structure of the structural global stress monitoring device involved in the embodiment of the present application. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0022] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0023] In a first aspect, an embodiment of the present application provides a method for monitoring global stress of a structure.

[0024] In one embodiment, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the method for monitoring global stress of a structure of the present application. Figure 1 As shown in Figure 2, the structural global stress monitoring method includes: S1: Determine the finite element model of the structure.

[0025] S2: Based on the measured values ​​of each measuring point on the structure and the observed values ​​of the corresponding measuring points on the finite element model, the equivalent load of the structure is derived.

[0026] In step S2, the measured values ​​at each measuring point on the structure can be measured using sensors to obtain corresponding values. For example, stress sensors can be installed at each selected location on the structure where the measured values ​​are to be measured, and the stress sensors output the measured values. Since the finite element model is consistent with the actual structure, the measurement points on the finite element model are completely consistent with the measurement points on the actual structure, and there is a one-to-one correspondence.

[0027] S3: Apply the equivalent load of the structure to the finite element model and calculate the stress of all components of the structure.

[0028] S4: Compare the deviation between the measured stress at each measuring point and the calculated stress of the component at the corresponding position in the structure, and issue an early warning when the deviation value is greater than the set value.

[0029] In the above embodiment, during the construction process of the structure, the above steps S2 to S4 are repeated according to the actual stress test results on the structure to display the global stress.

[0030] This embodiment can derive the equivalent load of the structure through the measured values ​​of the measuring points at various positions on the structure and the observed values ​​of the measuring points at corresponding positions on the finite element model; then, by applying the equivalent load to the finite element model, the stress of all components of the structure can be obtained, thereby greatly improving the comprehensiveness of safety monitoring, less likely to cause monitoring blind spots, and reducing safety hazards; at the same time, by comparing the deviation between the measured stress of each measuring point and the calculated stress of the components at corresponding positions in the structure, the deviation value is judged and an early warning is issued, which can timely detect problems at an early stage and provide assistance to actual on-site construction, thereby solving the technical problems existing in related technologies that easily cause monitoring blind spots and greatly reduce the guidance of safety monitoring for actual projects.

[0031] Preferably, after applying the equivalent load of the structure to the finite element model and calculating the stress of all components of the structure, the method further includes determining whether the calculated stress of components of the structure without measurement points exceeds a set stress value, and if so, issuing a warning. This embodiment utilizes the finite element model to calculate the stress of all components of the structure. Furthermore, the stress of components without measurement points (e.g., stress sensors) is monitored and warned, and the stress of all components of the structure is monitored and warned, significantly improving the comprehensiveness of safety monitoring. When monitoring and warning components without measurement points, the calculated stress of the component is compared with the set stress value to determine whether it exceeds the set stress value. If so, a warning is issued; if not, no warning is issued. The set stress value can be a value such as 80% or 75% of the allowable stress of the material corresponding to each component. This can be set according to actual needs and is not limited here.

[0032] Further, in one embodiment, see Figure 2 As shown, the finite element model of the determined structure may include: S11: Constructing an initial finite element model of the structure based on the design drawings. In this step, the initial finite element model is constructed according to the design drawings, and the location of the load needs to be determined according to the construction conditions.

[0033] After step S11 and before step S12, variables may be determined. Specifically, the amount that changes during the construction process may be determined. For example, in this embodiment, the variable for the support brackets in the structure is the magnitude of the load, and the variable for the movable brackets in the structure is the magnitude and position of the load. Of course, in other embodiments, the variable may also be other components in the structure, and this is not a limitation.

[0034] S12: Apply loads to the initial finite element model and record the response.

[0035] S13: The initial finite element model is modified based on the deviation between the response on the initial finite element model and the actual response on the structure until the deviation between the responses is less than a preset value, thereby obtaining a finite element model of the structure.

[0036] In this embodiment, the magnitude of the load applied to the initial finite element model is consistent with the magnitude of the load borne by the structure. In actual operation, multiple sets of loads can be applied to the initial finite element model, and the response (e.g., stress) corresponding to each set of loads can be recorded. If the magnitude of the load borne by the structure and the initial finite element model is consistent, but the response values ​​obtained are different, it means that there is a deviation between the initial finite element model and the actual structure, and the initial finite element model needs to be corrected. In this step, the particle swarm method can be used to correct the finite element model. During the correction process, the constraints of the finite element model are adjusted, and then the deviation between the response on the initial finite element model and the actual response on the structure when the load is the same is compared again. When the deviation value is less than the preset value, it means that the finite element model is close enough to the actual structure, and finally the finite element model closest to the structure is obtained.

[0037] Based on the above technical solution, in some embodiments, applying a load to the initial finite element model and recording a response may include: S121: Use structural testing to test the bridge, and collect loads and corresponding actual responses during the test.

[0038] In step S121 , the response here is stress. Since stress records increments, at least two sets of load-stress data are recorded.

[0039] S122: Apply the corresponding load collected during the trial jacking to the initial finite element model and record the response of the initial finite element model.

[0040] In step S122, the loads recorded in step S121 are applied to the initial finite element model respectively, and corresponding responses, ie, stresses, are obtained.

[0041] In this embodiment, the actual load on the actual structure can be obtained by using the test top method, and the actual load is applied to the initial finite element model, which can accurately reflect the deviation between the initial finite element model and the actual structure.

[0042] Furthermore, in one embodiment, after determining the finite element model of the structure and before step S2, the following step may be performed: fixing the stiffness matrix of the finite element model. In this step, the code of the finite element model may be modified, and a calling interface for the finite element model may be written for the variables determined after step S11. In this embodiment, only the position and magnitude of the loads change; the stiffness matrix of the finite element model remains unchanged. After the finite element model of the structure is determined, the stiffness matrix of the finite element model may be fixed to improve computational efficiency.

[0043] Furthermore, in one embodiment, before deriving the equivalent load of the structure, the following steps may be included: sequentially numbering the measurement points at each location on the structure, and simultaneously numbering the corresponding measurement points at each location on the finite element model, so that the measurement points on the finite element model correspond one-to-one with the numbers of the measurement points at each location on the structure. In this embodiment, a stress sensor is installed at each measurement point on the structure. Each stress sensor is numbered based on the actual location and frequency of the stress sensor on the structure, with stress sensors at different locations having different numbers. An access interface for the stress sensor is also developed, along with a calculation interface for the corresponding finite element model. This allows the data from the stress sensors and the corresponding measurement points on the finite element model to be transmitted to the backend system, facilitating the subsequent calculation of the equivalent load using this data in step S2.

[0044] Furthermore, in one embodiment, deducing the equivalent load of the structure based on the measured values ​​of each position measuring point on the structure and the observed values ​​of the corresponding position measuring points on the finite element model may include: S21: Construct a relationship matrix between the measured values ​​of each measuring point on the structure, the observed values ​​of the corresponding measuring points on the finite element model and the equivalent load of the structure.

[0045] S22: Based on the measured values ​​of each measuring point on the structure and the observed values ​​of the corresponding measuring points on the finite element model, the equivalent load of the structure is determined by matrix inversion.

[0046] The above step S2 is also called load inversion. In this step, the equivalent load of the structure can be derived by using the inverse matrix or particle swarm method. Specifically: Method 1: Use the matrix inversion method to determine the equivalent load F of the structure. The overall principle is: .

[0047] Where, For the m A measured value, which can be stress or displacement; For the n An unknown force, which can be of known magnitude but unknown position or unknown magnitude but known position. When the position is unknown, the approximate position should be known to ensure computational efficiency; is the stress transmission coefficient, which means that n When the load acts m The calculated value of the observation value can be obtained based on the finite element model and is a known condition.

[0048] The equivalent load F of the structure can be obtained by calculating the above equations.

[0049] Method 2: The unknown equivalent load F can be solved by using swarm intelligence algorithm. First, the objective function is set, and then the online finite element program is called to continuously change F to minimize the objective function.

[0050] Further, preferably, in the above embodiment, the measured value is a stress measured value or a displacement measured value, and if the measured value is a stress measured value, the observation value is also a stress observation value; if the measured value is a displacement measured value, the observation value is also a displacement observation value.

[0051] In a second aspect, an embodiment of the present application also provides a structural global stress monitoring device.

[0052] In one embodiment, a global structural stress monitoring device includes: a model construction module, which is used to determine a finite element model of a structure; an equivalent load calculation module, which is used to derive an equivalent load of the structure based on the measured values ​​of measuring points at various positions on the structure and the observed values ​​of measuring points at corresponding positions on the finite element model; a stress calculation module, which is used to apply the equivalent load of the structure to the finite element model and calculate the stress of all components of the structure; and an early warning module, which is used to compare the deviation between the measured stress of each measuring point and the calculated stress of the components at corresponding positions in the structure, and to issue an early warning when the deviation value is greater than a set value.

[0053] Furthermore, in one embodiment, the equivalent load calculation module is also used to construct a relationship matrix between the measured values ​​of each position measuring point on the structure, the observed values ​​of the corresponding position measuring points on the finite element model and the equivalent load of the structure; and based on the measured values ​​of each position measuring point on the structure and the observed values ​​of the corresponding position measuring points on the finite element model, the equivalent load of the structure is determined by matrix inversion.

[0054] Preferably, the measured value is a stress measured value or a displacement measured value.

[0055] Furthermore, in one embodiment, the model construction module is used to construct an initial finite element model of the structure based on the design drawings; apply a load to the initial finite element model and record the response; and correct the initial finite element model based on the deviation between the response on the initial finite element model and the actual response on the structure until the deviation between the responses is less than a preset value, thereby obtaining a finite element model of the structure.

[0056] Furthermore, in one embodiment, the model building module is also used to collect loads and corresponding actual responses during the structural trial jacking of the bridge; and apply the corresponding loads collected during the trial jacking to the initial finite element model and record the response of the initial finite element model.

[0057] Furthermore, in one embodiment, the structural global stress monitoring device further includes a stiffness matrix fixing module, which is used to fix the stiffness matrix of the finite element model.

[0058] Furthermore, in one embodiment, the structural global stress monitoring device also includes a writing module, which is used to number the measuring points at each position on the structure in sequence, and at the same time number the measuring points at the corresponding positions on the finite element model, so that the measuring points on the finite element model correspond one-to-one with the numbers of the measuring points at each position on the structure.

[0059] Among them, the functional implementation of each module in the above-mentioned structural global stress monitoring device corresponds to the various steps in the above-mentioned structural global stress monitoring method embodiment, and their functions and implementation processes are no longer repeated here.

[0060] In a third aspect, an embodiment of the present application provides a structural global stress monitoring device, which may be a personal computer (PC), a laptop computer, a server, or other device with data processing capabilities.

[0061] Reference Figure 3 , Figure 3 Schematic diagram of the hardware structure of the global structural stress monitoring device involved in the embodiment of the present application. In the embodiment of the present application, the global structural stress monitoring device may include a processor, a memory, a communication interface, and a communication bus.

[0062] The communication bus may be of any type and is used to interconnect the processor, memory, and communication interface.

[0063] Communication interfaces include input / output (I / O), physical, and logical interfaces, which interconnect components within the global structural stress monitoring device and connect it to other devices (such as other computing devices or user devices). Physical interfaces can include Ethernet, fiber, and ATM interfaces; user devices can include displays and keyboards.

[0064] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0065] The processor may be a general-purpose processor that can invoke a global structural stress monitoring program stored in a memory and execute the global structural stress monitoring method provided in the embodiments of the present application. For example, the general-purpose processor may be a central processing unit (CPU). The methods executed when the global structural stress monitoring program is invoked can be referenced in the various embodiments of the global structural stress monitoring method of the present application and will not be further described here.

[0066] Those skilled in the art will understand that Figure 3 The hardware structure shown in the figure does not constitute a limitation to the present application and may include more or fewer components than shown in the figure, or a combination of certain components, or a different arrangement of components.

[0067] In a fourth aspect, an embodiment of the present application also provides a readable storage medium.

[0068] The readable storage medium of the present application stores a structural global stress monitoring program, wherein when the structural global stress monitoring program is executed by a processor, the steps of the structural global stress monitoring method as described above are implemented.

[0069] Among them, the method implemented when the structural global stress monitoring program is executed can refer to the various embodiments of the structural global stress monitoring method of the present application, and will not be repeated here.

[0070] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0071] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit the "first", "second" and "third" to different types.

[0072] In the description of the embodiments of this application, the words "exemplary," "for example," or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary," "for example," or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary," "for example," or "for example" is intended to present the relevant concepts in a concrete manner.

[0073] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0074] In some processes described in the embodiments of the present application, multiple operations or steps are included that appear in a specific order. However, it should be understood that these operations or steps may not be performed in the order in which they appear in the embodiments of the present application or may be performed in parallel. The sequence numbers of the operations are only used to distinguish between different operations, and the sequence numbers themselves do not represent any order of execution. In addition, these processes may include more or fewer operations, and these operations or steps may be performed in sequence or in parallel, and these operations or steps may be combined.

[0075] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, or the part that contributes to the existing technology, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above and includes a number of instructions for enabling a terminal device to execute the methods described in each embodiment of this application.

[0076] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for monitoring global structural stress, characterized in that: The structural global stress monitoring method comprises: Determine the finite element model of the structure; Based on the measured values ​​of each measuring point on the structure and the observed values ​​of the corresponding measuring points on the finite element model, the equivalent load of the structure is derived; Apply the equivalent load of the structure to the finite element model and calculate the stress of all components of the structure; Compare the deviation between the measured stress at each measuring point and the calculated stress of the corresponding component in the structure, and issue an early warning when the deviation value is greater than the set value.

2. The structural global stress monitoring method according to claim 1, characterized in that: The equivalent load of the structure is derived based on the measured values ​​of each measuring point on the structure and the observed values ​​of the corresponding measuring points on the finite element model, including: Construct a relationship matrix between the measured values ​​of each measuring point on the structure, the observed values ​​of the corresponding measuring points on the finite element model and the equivalent load of the structure; Based on the measured values ​​of each measuring point on the structure and the observed values ​​of the corresponding measuring points on the finite element model, the equivalent load of the structure is determined by matrix inversion.

3. The method for monitoring global structural stress according to claim 1 or 2, wherein: The measured value is a stress measured value or a displacement measured value.

4. The method for monitoring global structural stress according to claim 1, wherein: The finite element model of the determined structure includes: Build an initial finite element model of the structure based on the design drawings; Apply loads to the initial finite element model and record the response; The initial finite element model is modified based on the deviation between the response on the initial finite element model and the actual response on the structure until the deviation between the responses is less than a preset value, thereby obtaining a finite element model of the structure.

5. The method for monitoring global structural stress according to claim 4, wherein: The method of applying loads to the initial finite element model and recording the responses includes: Using structural top-test bridges, during which loads and corresponding actual responses are collected; Apply the corresponding loads collected during the trial jacking to the initial finite element model and record the response of the initial finite element model.

6. The method for monitoring global structural stress according to claim 1, wherein: After applying the equivalent load of the structure to the finite element model and calculating the stress of all components of the structure, the method further includes: Determine whether the calculated stress of the components on the structure without measuring points exceeds the set stress value. If so, issue an early warning.

7. The method for monitoring global structural stress according to claim 1, wherein: Before deriving the equivalent loads for the structure, the following steps are also included: The measuring points at each position on the structure are numbered in sequence, and the corresponding measuring points on the finite element model are numbered at the same time, so that the measuring points on the finite element model correspond to the numbers of the measuring points at each position on the structure.

8. A structural global stress monitoring device, characterized in that: The structural global stress monitoring device comprises: a model building module for determining a finite element model of a structure; The equivalent load calculation module is used to derive the equivalent load of the structure based on the measured values ​​of each measuring point on the structure and the observed values ​​of the corresponding measuring points on the finite element model; Stress calculation module, which is used to apply the equivalent load of the structure to the finite element model and calculate the stress of all components of the structure; The early warning module is used to compare the deviation between the measured stress at each measuring point and the calculated stress of the component at the corresponding position in the structure, and issue an early warning when the deviation value is greater than the set value.

9. A structural global stress monitoring device, characterized in that: The structural global stress monitoring device includes a processor, a memory, and a structural global stress monitoring program stored in the memory and executable by the processor, wherein when the structural global stress monitoring program is executed by the processor, the steps of the structural global stress monitoring method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a structural global stress monitoring program, wherein when the structural global stress monitoring program is executed by a processor, the steps of the structural global stress monitoring method according to any one of claims 1 to 7 are implemented.

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