A bridge load effect analysis method, device, equipment and storage medium

Abstract

The present application relates to the technical field of bridge engineering, and in particular to a bridge load effect analysis method, device, equipment and storage medium. The method comprises the following steps: establishing a pier beam free model and a pier beam limiting model, and setting a pier beam limiting device connecting the pier beam in the pier beam limiting model; obtaining the load intensity and distribution corresponding to the most unfavorable internal force or deformation of the set control unit in the pier beam free model, and simultaneously obtaining the corresponding relative displacement of the pier beam node; determining the adaptive temperature load corresponding to the relative displacement of the pier beam limiting device according to the relative displacement; and calculating the structural response under the adaptive temperature load and the load corresponding to the most unfavorable internal force or deformation based on the pier beam limiting model. The method can solve the problem that the existing technology uses gap elements for nonlinear calculation, which does not meet the superposition principle, and needs to perform multiple iteration calculations and discriminations on the state of the gap elements between time steps, resulting in large calculation amount, low efficiency, and the problem of easy divergence.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering technology, specifically to a method, apparatus, equipment, and storage medium for analyzing bridge load effects. Background Technology

[0002] The most direct finite element method for simulating finite limit devices for bridge piers and beams is to use gap elements for nonlinear calculations. This method is suitable and convenient for calculating static load conditions.

[0003] For variable loads (such as operational live loads like train and vehicle loads), the operational live load needs to be defined as a time-history load that varies with time before performing dynamic nonlinear calculations; or the live load intensity and loading range corresponding to the most unfavorable internal forces or deformations of the control components can be tracked, converted into static loads, and then static nonlinear calculations can be performed.

[0004] However, because nonlinear calculation methods do not satisfy the superposition principle, they require multiple iterative calculations and judgments of the state of each time step interval element, resulting in a large computational load, low efficiency, and a tendency to fail to converge. The existing technology lacks practicality and is difficult to guide the design of bridge structures using finite constraint systems. Summary of the Invention

[0005] This application provides a method, apparatus, equipment, and storage medium for analyzing bridge load effects. It can solve the problems in the prior art that uses gap elements for nonlinear calculations, which does not meet the superposition principle and requires multiple iterative calculations and judgments of the gap element state at each time step, resulting in large computational load, low efficiency, and easy convergence issues.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0007] On the one hand, this application provides a method for analyzing bridge load effects, including the following steps:

[0008] Establish a free model and a limiting model for the pier and beam. The limiting model for the pier and beam includes a limiting device with a set stiffness that connects the pier and beam.

[0009] Obtain the load intensity and distribution corresponding to the most unfavorable internal force or deformation of the control unit in the pier-beam free model, and at the same time obtain the relative displacement of the pier-beam nodes in the pier-beam free model.

[0010] Based on the relative displacement of the pier nodes in the pier-beam free model, determine the adaptive temperature load corresponding to the pier-beam limiting device and the relative displacement in the pier-beam limiting model.

[0011] Based on the pier-beam limiting model, the structural response under the adaptive temperature load and the load corresponding to the most unfavorable internal force or deformation is calculated.

[0012] In some alternative solutions, the pier beam limiting device adopts an axially high stiffness truss unit.

[0013] In some alternative schemes, the set stiffness of the pier-beam limiting device is 80-120 times the maximum axial stiffness of other areas in the pier-beam limiting model.

[0014] In some alternative solutions, determining the adaptive temperature load corresponding to the relative displacement of the pier-beam nodes in the pier-beam free model and the pier-beam limiting device in the pier-beam limiting model includes:

[0015] If the relative displacement of the pier-beam node in the free model of the pier-beam is less than the design limit value of the relative displacement of the pier-beam node, then the pier-beam limiting device in the pier-beam limiting model adopts the adaptive temperature load corresponding to the relative displacement of the pier-beam node in the free model of the pier-beam.

[0016] If the relative displacement of the pier-beam nodes in the free model of the pier-beam is greater than or equal to the design limit value of the relative displacement of the pier-beam nodes, then the pier-beam limiting device in the limiting model of the pier-beam adopts the adaptive temperature load corresponding to the design limit value of the relative displacement of the pier-beam nodes.

[0017] In some alternative schemes, the adaptive temperature load corresponding to the relative displacement of the pier-beam nodes in the pier-beam free model is obtained, including:

[0018] Based on the length and linear expansion coefficient of the pier-beam limiting device, determine the temperature corresponding to the unit length of elongation of the pier-beam limiting device;

[0019] Based on the relative displacement of the pier-beam nodes in the free model of the pier-beam system and the temperature corresponding to the unit length of the extension of the pier-beam limiting device, the adaptive temperature load corresponding to the relative displacement of the pier-beam nodes in the free model of the pier-beam system is determined.

[0020] In some alternative solutions, the adaptive temperature load corresponding to the design limit value of the relative displacement of the pier-beam joint is obtained, including:

[0021] Based on the length and linear expansion coefficient of the pier-beam limiting device, determine the temperature corresponding to the unit length of elongation of the pier-beam limiting device;

[0022] Based on the design limit value of the relative displacement of the pier-beam joint and the temperature corresponding to the unit length of the extension of the pier-beam limiting device, determine the adaptive temperature load corresponding to the design limit value of the relative displacement of the pier-beam joint.

[0023] In some alternative solutions, the calculation of the structural response under the adaptive temperature load and the load corresponding to the most unfavorable internal force or deformation based on the pier-beam limiting model includes:

[0024] Based on the adaptive temperature load and the load corresponding to the most unfavorable internal force or deformation, determine the load combination of the load corresponding to the most unfavorable internal force or deformation and the adaptive temperature load.

[0025] The load combination of the most unfavorable internal force or deformation corresponding to the load and the adaptive temperature load is applied to the pier beam confinement model to perform structural response analysis under variable load.

[0026] Secondly, this application also provides a bridge load effect analysis device, comprising:

[0027] The model building module is used to build a free model of the pier and beam and a pier and beam limiting model. The pier and beam limiting model is equipped with a pier and beam limiting device with set stiffness that connects the pier and beam.

[0028] The relative displacement acquisition module is used to acquire the load intensity and distribution corresponding to the most unfavorable internal force or deformation of the control unit in the pier-beam free model, and at the same time acquire the relative displacement of the pier-beam node in the pier-beam free model.

[0029] The temperature load acquisition module is used to determine the adaptive temperature load corresponding to the relative displacement of the pier and beam nodes in the pier and beam free model.

[0030] The response analysis module is used to calculate the structural response under the adaptive temperature load and the load corresponding to the most unfavorable internal force or deformation, based on the pier-beam limiting model.

[0031] Thirdly, this application also provides a computer device, the computer device including a processor, a memory, and a computer program stored in the memory and executable by the processor, wherein when the computer program is executed by the processor, it implements the steps of the bridge load effect analysis method described in any of the above claims.

[0032] Fourthly, this application also provides a computer-readable storage medium storing a computer program, wherein when the computer program is executed by a processor, it implements the steps of the bridge load effect analysis method described in any of the preceding claims.

[0033] The beneficial effects of the technical solution provided in this application include: This application establishes a free model of the pier and beam and a pier-beam limiting model. The pier-beam limiting model includes a pier-beam limiting device with a set stiffness that connects the pier and beam. The application obtains the load intensity and distribution corresponding to the most unfavorable internal force or deformation of the control unit in the free model of the pier and beam, and simultaneously obtains the relative displacements corresponding to the pier-beam nodes in the free model of the pier and beam. Based on the relative displacements of the pier-beam nodes in the free model of the pier and beam, the application determines the adaptive temperature load corresponding to the relative displacement of the pier-beam limiting device in the pier-beam limiting model. Based on the pier-beam limiting model, the application calculates the structural response under the adaptive temperature load and the load corresponding to the most unfavorable internal force or deformation, to guide the design of bridge structures with limiting systems. Because this solution uses a pier-beam limiting device to connect the pier and beam, and adjusts the elongation of the pier-beam limiting device by changing its temperature, it replaces the original limiting device using gap elements. This allows for the equivalent of nonlinear calculations under confined boundary conditions in the form of static linear calculations during the most unfavorable load analysis, ensuring calculation accuracy while simplifying the calculation process and improving calculation efficiency. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a flowchart of the bridge load effect analysis method in the embodiments of this application;

[0036] Figure 2 This is a schematic block diagram of the structure of the computer device in the embodiments of this application. Detailed Implementation

[0037] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0038] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0039] like Figure 1 As shown, this application provides a method for analyzing bridge load effects, including the following steps:

[0040] S1: Establish a free model and a limiting model for the pier and beam. The limiting model for the pier and beam includes a limiting device with set stiffness that connects the pier and beam.

[0041] In this embodiment, no pier / beam limiting device is set in the free model of the pier / beam, that is, the limiting direction is free.

[0042] In addition, the pier-beam limiting model includes a pier-beam limiting device with a set stiffness that connects the pier and beam. This device uses axially high stiffness truss elements. The set stiffness of the pier-beam limiting device, i.e., the axially high stiffness truss element, is 80-120 times the maximum axial stiffness of other areas in the pier-beam limiting model.

[0043] In this example, the piers and beams are connected using axially stiff truss elements. The elongation of these elements is adjusted by changing their temperature, thus replacing the original limiting device using gap elements. This allows for equivalent nonlinear calculations under the limiting boundary conditions to be performed using static linear calculations during the most unfavorable load analysis, ensuring calculation accuracy while simplifying the calculation process and improving computational efficiency.

[0044] The limiting device for the gap unit is to set a limiting bracket or block between the beam and the pier, and reserve a certain gap, which is the design limit value of the relative displacement of the pier-beam node mentioned below.

[0045] S2: Obtain the load intensity and distribution of the most unfavorable internal force or deformation corresponding to the control unit in the pier-beam free model, and at the same time obtain the relative displacement of the pier-beam nodes in the pier-beam free model.

[0046] In this embodiment, by adjusting the load on the free model of the pier and beam, the most unfavorable internal force or deformation analysis of the set control unit of the free model of the pier and beam is performed, thereby obtaining the load corresponding to the most unfavorable internal force or deformation of the set control unit in the free model of the pier and beam, and at the same time obtaining the relative displacement of the pier and beam nodes in the free model of the pier and beam under the load condition corresponding to the most unfavorable internal force or deformation.

[0047] Among them, the loads corresponding to the most unfavorable internal forces or deformations include dead loads, moving loads, and other additional loads.

[0048] S3: Based on the relative displacement of the pier nodes in the pier-beam free model, determine the adaptive temperature load corresponding to the pier-beam limiting device and the relative displacement in the pier-beam limiting model.

[0049] In some optional embodiments, step S3 specifically includes:

[0050] A: If the relative displacement of the pier-beam node in the free model of the pier-beam is less than the design limit value of the relative displacement of the pier-beam node, then the pier-beam limiting device in the pier-beam limiting model adopts the adaptive temperature load corresponding to the relative displacement of the pier-beam node in the free model of the pier-beam.

[0051] In some optional embodiments, obtaining the adaptive temperature load corresponding to the relative displacement of the pier-beam nodes in the pier-beam free model includes:

[0052] Based on the length and linear expansion coefficient of the pier-beam limiting device, determine the temperature corresponding to the unit length of extension of the pier-beam limiting device.

[0053] Specifically, the temperature Δt corresponding to the unit length of extension of the pier-beam limiting device is determined according to the formula Δt = 1 / αL. Here, α is the linear expansion coefficient of the limiting device, and L represents the longitudinal length of the pier-beam limiting device along the bridge direction.

[0054] Based on the relative displacement of the pier-beam nodes in the free model of the pier-beam system and the temperature corresponding to the unit length of the extension of the pier-beam limiting device, the adaptive temperature load corresponding to the relative displacement of the pier-beam nodes in the free model of the pier-beam system is determined.

[0055] Specifically, according to formula γ T =d·△t, the adaptive temperature load condition coefficient γ corresponding to the relative displacement of the pier-beam nodes in the pier-beam free model. T , where d is the relative displacement of the pier-beam node in the pier-beam free model.

[0056] B: If the relative displacement of the pier-beam node in the pier-beam free model is greater than or equal to the design limit value of the relative displacement of the pier-beam node, then the pier-beam limiting device in the pier-beam limiting model adopts the adaptive temperature load corresponding to the design limit value of the relative displacement of the pier-beam node.

[0057] In some optional embodiments, obtaining the adaptive temperature load corresponding to the design limit value of the relative displacement of the pier-beam joint includes:

[0058] Based on the length and linear expansion coefficient of the pier-beam limiting device, determine the temperature corresponding to the unit length of extension of the pier-beam limiting device.

[0059] Specifically, the temperature Δt corresponding to the unit length of extension of the pier-beam limiting device is determined according to the formula Δt = 1 / αL. Here, α is the linear expansion coefficient of the limiting device, and L represents the longitudinal length of the pier-beam limiting device along the bridge direction.

[0060] Based on the design limit value of the relative displacement of the pier-beam joint and the temperature corresponding to the unit length of the extension of the pier-beam limiting device, determine the adaptive temperature load corresponding to the design limit value of the relative displacement of the pier-beam joint.

[0061] Specifically, according to formula γ T= [d0]·△t, determine the adaptive temperature load condition coefficient γ corresponding to the relative displacement of the pier-beam nodes in the pier-beam free model. T Where [d0] is the design limit value of the relative displacement of the pier-beam joint.

[0062] S4: Based on the pier-beam limiting model, calculate the structural response under the adaptive temperature load and the load corresponding to the most unfavorable internal force or deformation.

[0063] In some optional embodiments, step S4 includes:

[0064] S41: Determine the load combination of the load corresponding to the most unfavorable internal force or deformation and the adaptive temperature load based on the adaptive temperature load and the load corresponding to the most unfavorable internal force or deformation.

[0065] S42: Apply the load combination of the most unfavorable internal force or deformation corresponding to the pier beam limit model and the adaptive temperature load, and perform response analysis under variable load.

[0066] In this example, by adjusting the loads on the free model of the pier and beam, the most unfavorable internal force or deformation analysis of the control unit in the free model of the pier and beam is performed. The loads corresponding to the most unfavorable internal force or deformation of the control unit in the free model of the pier and beam are obtained, which can be converted into the corresponding static load case Q. A unit overall temperature load case (temperature load case code is T) is defined for the pier and beam limiting device.

[0067] Based on the adaptive temperature load and the load corresponding to the most unfavorable internal force or deformation, the load combination S of the most unfavorable internal force or deformation and the adaptive temperature load is S = Q + γ. T T.

[0068] By applying the load combination of the most unfavorable internal force or deformation corresponding to the load and the adaptive temperature load to the pier-beam confinement model, structural response analysis under variable load can be performed.

[0069] Specifically, the most unfavorable internal force or deformation corresponding load is applied to the pier-beam limiting model, an adaptive temperature load is applied to the pier-beam limiting device in the pier-beam limiting model, and a response analysis is performed on the pier-beam limiting model under variable load.

[0070] On the other hand, the present invention also provides a bridge load effect analysis device for implementing the bridge load effect analysis method described in any of the above claims, comprising: a model building module, a relative displacement acquisition module, a temperature load acquisition module, and a response analysis module.

[0071] The model building module is used to build a free model of the pier and beam and a pier and beam restraint model. The pier and beam restraint model is set with a pier and beam restraint device with a set stiffness to connect the pier and beam. The relative displacement acquisition module is used to obtain the load intensity and distribution of the control unit with the most unfavorable internal force or deformation in the free model of the pier and beam, and at the same time obtain the relative displacement of the pier and beam nodes in the free model of the pier and beam. The temperature load acquisition module is used to determine the adaptive temperature load corresponding to the pier and beam restraint device and the relative displacement in the pier and beam restraint model based on the relative displacement of the pier and beam nodes in the free model of the pier and beam. The response analysis module is used to calculate the structural response under the action of the adaptive temperature load and the load corresponding to the most unfavorable internal force or deformation based on the pier and beam restraint model.

[0072] It should be noted that those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the above-described device and its modules and units can be referred to the corresponding processes in the foregoing embodiments, and will not be repeated here.

[0073] The apparatus provided in the above embodiments can be implemented as a computer program that can run on a computer device.

[0074] Please see Figure 2 , Figure 2 This is a schematic block diagram illustrating the structure of a computer device provided in an embodiment of this application. The computer device can be a terminal.

[0075] like Figure 2 As shown, the computer device includes a processor, memory, and network interface connected via a system bus, wherein the memory may include non-volatile storage media and internal memory.

[0076] Non-volatile storage media can store operating systems and computer programs. These computer programs include program instructions that, when executed, cause the processor to perform any bridge load effect analysis method.

[0077] The processor provides computing and control capabilities, supporting the operation of the entire computer device.

[0078] Internal memory provides an environment for the execution of computer programs in non-volatile storage media. When these computer programs are executed by the processor, the processor can perform any bridge load effect analysis method.

[0079] This network interface is used for network communication, such as sending assigned tasks. Those skilled in the art will understand that... Figure 2The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0080] It should be understood that the processor can be a Central Processing Unit (CPU), but it can also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Among these, a general-purpose processor can be a microprocessor or any conventional processor.

[0081] In one embodiment, the processor is configured to run a computer program stored in memory to perform the following steps:

[0082] This application also provides a computer-readable storage medium storing a computer program, the computer program including program instructions, and the method implemented when the program instructions are executed can be referred to various embodiments of this application.

[0083] The computer-readable storage medium may be an internal storage unit of the computer device described in the foregoing embodiments, such as the hard disk or memory of the computer device. The computer-readable storage medium may also be an external storage device of the computer device, such as a plug-in hard disk, SmartMedia Card (SMC), Secure Digital (SD) card, or Flash Card equipped on the computer device.

[0084] The implementation process of this technology will be further illustrated by an example:

[0085] 1. Establish two sets of full-bridge finite element calculation models.

[0086] (1) Pier-beam free model: The pier-beam limiting device is not simulated, that is, the limiting direction is free.

[0087] (2) Pier-beam limiting model: The limiting direction of the pier-beam limiting device is simulated using axially high-stiffness truss elements. The axial stiffness is 100 times the maximum axial stiffness of all elements in the calculation model. For example, the maximum axial stiffness K of the element in the calculation model is 1.0 × 10⁻⁶. 6 If the axial stiffness of the limiting unit is kN / m, then it is taken as 100K = 1.0 × 10 kN / m. 8 kN / m.

[0088] The unit overall temperature load condition T is defined for this truss unit. The temperature load value is taken as the temperature Δt corresponding to the unit elongating by 1 mm.

[0089] △t=1 / (1.2×10 -5 (×10000)=8.33℃.

[0090] In this example, the truss unit is made of steel, and the coefficient of linear expansion α is taken as 1.2 × 10⁻⁶. -5 (1 / ℃);

[0091] The length L of the limiting unit is set to 10m.

[0092] 2. Track the load corresponding to the most unfavorable internal force or deformation of the control unit in the free model and convert it into the corresponding static load case (code Q). At the same time, define this static load case in the constrained model.

[0093] 3. In this example, the relative displacement d between the pier and beam nodes in the free model is 286 mm, and the design limit value [d0] is 300 mm. Determine the unit overall temperature load combination coefficient γ in the limit model. T .

[0094] Since d < [d0], the deformation of the limiting device did not reach the predetermined design value. According to the principle of deformation equivalence, the combination coefficient of unit temperature load in the limiting model is determined.

[0095] γ T =d·△t=286×8.33=2382.38;

[0096] 4. Based on the adaptive temperature load and the load corresponding to the most unfavorable internal force or deformation, perform response analysis on the pier-beam restraint model under variable load.

[0097] In summary, this application establishes a free pier-beam model and a pier-beam restraint model. The pier-beam restraint model includes a pier-beam restraint device with a set stiffness that connects the pier and beam. The application obtains the load intensity and distribution corresponding to the most unfavorable internal force or deformation of the control unit in the free pier-beam model, and simultaneously obtains the relative displacements of the pier-beam nodes in the free pier-beam model. Based on the relative displacements of the pier-beam nodes in the free pier-beam model, the application determines the adaptive temperature load corresponding to the relative displacement of the pier-beam restraint device in the pier-beam restraint model. Based on the pier-beam restraint model, the application calculates the structural response under the adaptive temperature load and the load corresponding to the most unfavorable internal force or deformation, to guide the design of bridge structures with restraint systems. Because this scheme uses a pier-beam restraint device to connect the pier and beam, and adjusts the elongation of the pier-beam restraint device by changing its temperature, it replaces the original restraint device using gap elements. This allows for equivalent static linear calculations to be performed under the restraint boundary conditions during the most unfavorable load analysis, ensuring calculation accuracy while simplifying the calculation process and improving calculation efficiency.

[0098] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0099] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0100] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for analyzing bridge load effects, characterized in that, Includes the following steps: Establish a free model and a limiting model for the pier and beam. The limiting model for the pier and beam includes a limiting device with a set stiffness that connects the pier and beam. Obtain the load intensity and distribution corresponding to the most unfavorable internal force or deformation of the control unit in the pier-beam free model, and at the same time obtain the relative displacement of the pier-beam nodes in the pier-beam free model. Based on the relative displacement of the pier-beam nodes in the free model of the pier-beam, determine the adaptive temperature load corresponding to the relative displacement of the pier-beam limiting device in the pier-beam limiting model, including: If the relative displacement of the pier-beam nodes in the free model is less than the design limit value of the relative displacement of the pier-beam nodes, then the pier-beam limiting device in the pier-beam limiting model adopts the adaptive temperature load corresponding to the relative displacement of the pier-beam nodes in the free model; obtaining the adaptive temperature load corresponding to the relative displacement of the pier-beam nodes in the free model includes: Based on the length and linear expansion coefficient of the pier-beam limiting device, determine the temperature corresponding to the unit length of extension of the pier-beam limiting device; based on the relative displacement of the pier-beam nodes in the pier-beam free model and the temperature corresponding to the unit length of extension of the pier-beam limiting device, determine the adaptive temperature load corresponding to the relative displacement of the pier-beam nodes in the pier-beam free model. If the relative displacement of the pier-beam nodes in the free model is greater than or equal to the design limit value of the relative displacement of the pier-beam nodes, then the pier-beam limiting device in the limiting model adopts the adaptive temperature load corresponding to the design limit value of the relative displacement of the pier-beam nodes. The adaptive temperature load corresponding to the design limit value of the relative displacement of the pier-beam nodes includes: Based on the length and linear expansion coefficient of the pier-beam limiting device, determine the temperature corresponding to the unit length of extension of the pier-beam limiting device; based on the design limit value of the relative displacement of the pier-beam node and the temperature corresponding to the unit length of extension of the pier-beam limiting device, determine the adaptive temperature load corresponding to the design limit value of the relative displacement of the pier-beam node. Based on the pier-beam limiting model, the structural response under the adaptive temperature load and the load corresponding to the most unfavorable internal force or deformation is calculated.

2. The bridge load effect analysis method as described in claim 1, characterized in that, The pier beam limiting device adopts an axially high stiffness truss unit.

3. The bridge load effect analysis method as described in claim 2, characterized in that: The set stiffness of the pier-beam limiting device is 80-120 times the maximum axial stiffness of other areas in the pier-beam limiting model.

4. The bridge load effect analysis method as described in claim 1, characterized in that: The calculation of the structural response under the adaptive temperature load and the load corresponding to the most unfavorable internal force or deformation based on the pier-beam limiting model includes: Based on the adaptive temperature load and the load corresponding to the most unfavorable internal force or deformation, determine the load combination of the load corresponding to the most unfavorable internal force or deformation and the adaptive temperature load. The load combination of the most unfavorable internal force or deformation corresponding to the load and the adaptive temperature load is applied to the pier beam confinement model to perform structural response analysis under variable load.

5. A bridge load effect analysis device, characterized in that, include: The model building module is used to build a free model of the pier and beam and a pier and beam limiting model. The pier and beam limiting model is equipped with a pier and beam limiting device with set stiffness that connects the pier and beam. The relative displacement acquisition module is used to acquire the load intensity and distribution corresponding to the most unfavorable internal force or deformation of the control unit in the pier-beam free model, and at the same time acquire the relative displacement of the pier-beam node in the pier-beam free model. The temperature load acquisition module is used to determine the adaptive temperature load corresponding to the relative displacement of the pier nodes in the pier-beam free model, including: If the relative displacement of the pier-beam nodes in the free model is less than the design limit value of the relative displacement of the pier-beam nodes, then the pier-beam limiting device in the pier-beam limiting model adopts the adaptive temperature load corresponding to the relative displacement of the pier-beam nodes in the free model; obtaining the adaptive temperature load corresponding to the relative displacement of the pier-beam nodes in the free model includes: Based on the length and linear expansion coefficient of the pier-beam limiting device, determine the temperature corresponding to the unit length of extension of the pier-beam limiting device; based on the relative displacement of the pier-beam nodes in the pier-beam free model and the temperature corresponding to the unit length of extension of the pier-beam limiting device, determine the adaptive temperature load corresponding to the relative displacement of the pier-beam nodes in the pier-beam free model. If the relative displacement of the pier-beam nodes in the free model is greater than or equal to the design limit value of the relative displacement of the pier-beam nodes, then the pier-beam limiting device in the limiting model adopts the adaptive temperature load corresponding to the design limit value of the relative displacement of the pier-beam nodes. The adaptive temperature load corresponding to the design limit value of the relative displacement of the pier-beam nodes includes: Based on the length and linear expansion coefficient of the pier-beam limiting device, determine the temperature corresponding to the unit length of extension of the pier-beam limiting device; based on the design limit value of the relative displacement of the pier-beam node and the temperature corresponding to the unit length of extension of the pier-beam limiting device, determine the adaptive temperature load corresponding to the design limit value of the relative displacement of the pier-beam node. The response analysis module is used to calculate the structural response under the adaptive temperature load and the load corresponding to the most unfavorable internal force or deformation, based on the pier-beam limiting model.

6. A computer device, characterized in that, The computer device includes a processor, a memory, and a computer program stored in the memory and executable by the processor, wherein when the computer program is executed by the processor, it implements the steps of the bridge load effect analysis method as described in any one of claims 1 to 4.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, wherein when the computer program is executed by a processor, it implements the steps of the bridge load effect analysis method as described in any one of claims 1 to 4.

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