Steel-concrete composite beam bridge stud anti-lifting optimization design analysis method, device, equipment and medium

Abstract

The invention discloses an anti-lifting optimization design analysis method, device, equipment and medium for studs of a steel-concrete composite beam bridge, and relates to the field of composite structure engineering.The method comprises the steps that a stud connection composite beam finite element analysis model is established, and target parameters of the composite beam finite element analysis model are parameterized; determining a connection relationship among all parts of the composite beam finite element analysis model, and inputting a real load and a boundary condition into the composite beam finite element analysis model for analysis to obtain a lifting force effect value of each stud; performing a stud drawing bearing capacity test by the stud anchoring test model to obtain the anchoring bearing capacity of the stud in the concrete; checking that the lifting force effect value of each stud does not exceed the anchoring bearing capacity of the stud in the concrete, obtaining the optimal parameter combination of the steel-concrete composite beam through finite element analysis, and obtaining the optimal diameter and burial depth arrangement of the stud through a stud drawing bearing capacity test. According to the invention, the problem that the studs of the steel-concrete composite beam bridge may be lifted up can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of composite structure engineering, and in particular to an optimization design analysis method, device, equipment and medium for preventing the lifting of bolts of a steel-concrete composite beam bridge. Background Art

[0002] Steel-concrete composite beam bridge is a type of bridge that effectively combines steel beams and concrete bridge decks through shear connectors. It can give full play to the material properties of both and has been widely used for its rational force performance, material economy and overall superiority. Shear connectors are important components to ensure that composite beam bridge decks and steel beams work together, and studs are the most widely used type of shear connectors. In actual engineering applications, various connectors have different degrees of flexibility, especially the widely used stud shear connectors, which show obvious flexibility. When the connector is flexible, due to the axial strain difference on the interface, it causes horizontal relative slip between the two components; similarly, due to the inconsistency of the deflection and deformation generated by each, it causes vertical displacement between the two components, resulting in inconsistent deformation and unequal curvature.

[0003] At present, the design calculation of the force of studs in most domestic and foreign steel-concrete composite structure specifications generally only considers its longitudinal shear resistance, that is, the role of studs in resisting the horizontal relative slip between steel beams and concrete flanges. Although there are a small number of research reports that objectively and qualitatively point out the existence of the vertical uplift phenomenon at the composite beam interface, there are also some national specifications, such as the British "Steel Bridges, Concrete Bridges and Combined Bridges", which require the calculation of both the longitudinal shear resistance of studs and the uplift force borne by studs due to resisting the separation (i.e. uplift) between steel beams and concrete flanges, but no specific calculation formulas and clear calculation methods are given. Summary of the invention

[0004] The embodiment of the present invention provides a steel-concrete composite beam bridge bolt anti-lifting optimization design analysis method, device, equipment and medium. Through a series of finite element analysis and indoor tests, an anti-lifting optimization design of a steel-concrete composite beam bridge is obtained. The method has the advantages of strong operability, high calculation efficiency, easy to understand the principle, good reliability, etc., and can solve the problem of bolt lifting that may occur in steel-concrete composite beam bridges.

[0005] In a first aspect, the present invention provides a method for optimizing the anti-lifting design of bolts of a steel-concrete composite beam bridge, comprising:

[0006] Establish a finite element analysis model of bolt-connected composite beams and parameterize the target parameters of the finite element analysis model of composite beams;

[0007] Determine the connection relationship between the various parts of the composite beam finite element analysis model, input the real load and boundary conditions into the composite beam finite element analysis model for analysis, and obtain the lifting force effect value of each stud;

[0008] The bolt pull-out bearing capacity test is carried out on the bolt anchor test model to obtain the anchor bearing capacity of the bolt in the concrete.

[0009] The lifting force effect value of each stud is checked to be no greater than the anchorage bearing capacity of the stud in the concrete. The optimal parameter combination of the steel-concrete composite beam is obtained through finite element analysis. The optimal diameter and buried depth arrangement of the studs are obtained through stud pull-out bearing capacity tests.

[0010] In some examples, the composite beam finite element analysis model includes a reinforced concrete bridge deck, a steel main beam, and bolts, wherein the reinforced concrete bridge deck and the steel main beam are connected by the bolts.

[0011] In some instances, the connection relationship between the various parts of the composite beam finite element analysis model is as follows: there is binding contact between the bolt and the upper flange of the steel main beam, there is friction contact between the bolt and the surface of the hole of the reinforced concrete bridge deck that cannot be penetrated normally, and there is friction contact between the steel beam and the lower surface of the reinforced concrete bridge deck that cannot be penetrated normally.

[0012] In some examples, the target parameters of the composite beam finite element analysis model include: reinforced concrete bridge deck thickness, steel main beam spacing, steel main beam transverse stiffening rib thickness, stud longitudinal spacing, stud diameter and stud height.

[0013] In some instances, in the composite beam finite element analysis model, the steel main beam, reinforced concrete bridge deck and bolts are modeled according to actual size and simulated using solid elements. The steel main beam material model is bilinear, the bolt material is plastic, and the reinforced concrete bridge deck material is a plastic damage model.

[0014] In some examples, the plasticity curve is determined according to actual pull-out tests, and the damage model curve is determined according to actual concrete material types.

[0015] In some examples, the bolt pull-out bearing capacity test is performed on the bolt anchor test model to obtain the anchor bearing capacity of the bolt in the concrete, including:

[0016] A concrete test block model is made of bridge deck concrete material, and bolts are embedded in the concrete test block model to make a bolt pull-out bearing capacity test model;

[0017] The bolt pull-out test was carried out in the laboratory to obtain the anchorage bearing capacity of the bolt in concrete.

[0018] In a second aspect, the present invention provides a device for optimizing the design and analysis of bolt anti-lifting of steel-concrete composite beam bridges, comprising:

[0019] The finite element model building module is used to build a finite element analysis model of a bolt-connected composite beam and parameterize the target parameters of the finite element analysis model of the composite beam;

[0020] The analysis module is used to determine the connection relationship between the various parts of the composite beam finite element analysis model, input the real load and boundary conditions into the composite beam finite element analysis model for analysis, and obtain the lifting force effect value of each stud;

[0021] The test module is used to perform a bolt pull-out bearing capacity test on a bolt anchor test model to obtain the anchor bearing capacity of the bolt in concrete;

[0022] The optimization module is used to check that the lifting force effect value of each stud does not exceed the anchorage bearing capacity of the stud in the concrete. The optimal parameter combination of the steel-concrete composite beam is obtained through finite element analysis, and the optimal diameter and buried depth arrangement of the studs are obtained through stud pull-out bearing capacity tests.

[0023] In a third aspect, the present invention provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any one of the above methods when executing the computer program.

[0024] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the steps of any of the above methods when executed by a processor.

[0025] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0026] (1) The present invention establishes a finite element analysis model of a bolt-connected composite beam, parameterizes the target parameters of the finite element analysis model of the composite beam; determines the connection relationship between the various parts of the finite element analysis model of the composite beam, inputs the real load and boundary conditions into the finite element analysis model for analysis, and obtains the lifting force effect value of each bolt; performs a bolt pull-out bearing capacity test on the bolt anchor test model to obtain the anchor bearing capacity of the bolt in concrete; verifies that the lifting force effect value of each bolt does not exceed the anchor bearing capacity of the bolt in concrete, obtains the optimal parameter combination of the steel-concrete composite beam through finite element analysis, and obtains the optimal diameter and buried depth arrangement of the bolt through the bolt pull-out bearing capacity test. Through a series of finite element analyses and indoor tests, an anti-lifting optimization design of a steel-concrete composite beam bridge is obtained, which has the advantages of strong operability, high calculation efficiency, easy to understand principle, good reliability, etc., and can solve the problem of bolt lifting that may occur in steel-concrete composite beam bridges.

[0027] (2) The model established by the present invention fully considers the nonlinearity and damage characteristics of the material, accurately simulates the interaction between the bridge deck, bolts, and steel beams, and can accurately obtain the internal forces and displacement responses of the composite beam under specific loads.

[0028] (3) The model established by the present invention can conveniently perform parametric design on steel-concrete composite beam bridges and quickly obtain the bolt lifting force effect values ​​for specific loads and boundary conditions under different parameter combinations.

[0029] (4) The present invention can accurately determine the influence of different types of bridge deck materials on the bearing capacity of the stud lifting force. The accuracy of the stud lifting bearing capacity obtained through the test is guaranteed, which can guide the design more accurately.

[0030] (5) The composite beam anti-lifting optimization design method formed by the present invention comprehensively considers the parameters of the composite beam itself, such as the thickness of the composite beam bridge deck, the main beam spacing, the main beam stiffening rib arrangement, and the influence of the bolt parameters, such as the bolt diameter, bolt length, and bolt arrangement spacing, on the bolt lifting force. The idea is clear and the method is highly operational, which is easy for engineering personnel to master and apply. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 It is a flow chart of the anti-lifting optimization design method of the steel-concrete composite beam bridge bolts provided by the embodiment of the present invention;

[0033] Figure 2 It is a flow chart of the whole process of the anti-lifting optimization design method of the steel-concrete composite beam bridge bolts provided by the embodiment of the present invention;

[0034] Figure 3 The overall model of the steel-concrete composite beam bridge provided by the embodiment of the present invention;

[0035] Figure 4 It is a steel-concrete composite beam bridge cross-section model provided by an embodiment of the present invention;

[0036] Figure 5 It is a bolt anchoring performance pull-out test device model provided by an embodiment of the present invention;

[0037] Figure 6 is a curve showing the maximum lifting force of the bolts changing with the thickness of the bridge deck at different main beam spacings (2m, 2.5m, 3m) provided by an embodiment of the present invention;

[0038] Figure 7 is a curve showing the maximum lifting force of the studs changing with the thickness of the stiffening ribs at different main beam spacings (2m, 2.5m, 3m) provided by an embodiment of the present invention;

[0039] Figure 8 is a curve diagram showing the maximum lifting force of the bolts according to the variation of the main beam spacing provided by the embodiment of the present invention;

[0040] Fig. 9 is a schematic diagram of a device provided by an embodiment of the present invention;

[0041] Fig.10 It is a schematic diagram of the structure of a computer device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0043] In the following description, specific embodiments of the present invention will be described with reference to steps and symbols performed by one or more computers, unless otherwise specified. Therefore, these steps and operations will be mentioned several times as being performed by a computer, and computer execution referred to herein includes operations by a computer processing unit of electronic signals representing data in a structured form. This operation converts the data or maintains it at a location in the computer's memory system, which can be reconfigured or otherwise change the operation of the computer in a manner familiar to testers in the field. The data structure maintained by the data is a physical location in the memory, which has specific characteristics defined by the data format. However, the principles of the present invention are described in the above text, which does not represent a limitation, and testers in the field will understand that the following various steps and operations can also be implemented in hardware.

[0044] The term "module" or "unit" used herein can be regarded as a software object executed on the computing system. The different components, modules, engines and services in this article can be regarded as implementation objects on the computing system. The apparatus and method in this article are preferably implemented in software, but can also be implemented in hardware, all within the scope of protection of the present invention.

[0045] Those skilled in the art will appreciate that, unless expressly stated otherwise, the singular forms "a", "an", "" and "the" used herein may also include the plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other elements, or there may be intermediate elements. In addition, "connected" or "coupled" as used herein may include wireless connections or wireless couplings. The term "and / or" as used herein includes all or any unit and all combinations of one or more associated listed items.

[0046] In a first embodiment of the present invention, the present invention provides a method for optimizing the design and analysis of bolt anti-lifting of steel-concrete composite beam bridges, such as Figure 1 As shown, the following steps are included:

[0047] S102: establishing a finite element analysis model of a bolt-connected composite beam, and parameterizing target parameters of the finite element analysis model of the composite beam;

[0048] S102: determining the connection relationship between the various parts of the composite beam finite element analysis model, inputting the real load and boundary conditions into the composite beam finite element analysis model for analysis, and obtaining the lifting force effect value of each stud;

[0049] S103: performing a bolt pull-out bearing capacity test on the bolt anchor test model to obtain the anchor bearing capacity of the bolt in the concrete;

[0050] S104: Check that the lifting force effect value of each stud does not exceed the anchorage bearing capacity of the stud in concrete, obtain the optimal parameter combination of the steel-concrete composite beam through finite element analysis, and obtain the optimal diameter and buried depth arrangement of the stud through stud pull-out bearing capacity test.

[0051] In some examples, the composite beam finite element analysis model includes a reinforced concrete bridge deck, a steel main beam, and bolts, wherein the reinforced concrete bridge deck and the steel main beam are connected by the bolts.

[0052] In some instances, the connection relationship between the various parts of the composite beam finite element analysis model is as follows: there is binding contact between the bolt and the upper flange of the steel main beam, there is friction contact between the bolt and the surface of the hole of the reinforced concrete bridge deck that cannot be penetrated normally, and there is friction contact between the steel beam and the lower surface of the reinforced concrete bridge deck that cannot be penetrated normally.

[0053] In some examples, the target parameters of the composite beam finite element analysis model include: reinforced concrete bridge deck thickness, steel main beam spacing, steel main beam transverse stiffening rib thickness, stud longitudinal spacing, stud diameter and stud height.

[0054] In some instances, in the composite beam finite element analysis model, the steel main beam, reinforced concrete bridge deck and bolts are modeled according to actual size and simulated using solid elements. The steel main beam material model is bilinear, the bolt material is plastic, and the reinforced concrete bridge deck material is a plastic damage model.

[0055] In some examples, the plasticity curve is determined according to actual pull-out tests, and the damage model curve is determined according to actual concrete material types.

[0056] In some examples, the bolt pull-out bearing capacity test is performed on the bolt anchor test model to obtain the anchor bearing capacity of the bolt in the concrete, including:

[0057] A concrete test block model is made of bridge deck concrete material, and bolts are embedded in the concrete test block model to make a bolt pull-out bearing capacity test model;

[0058] The bolt pull-out test was carried out in the laboratory to obtain the anchorage bearing capacity of the bolt in concrete.

[0059] In the second embodiment of the present invention, Figure 2 As shown, a method for optimizing the anti-lifting design of bolts of a steel-concrete composite beam bridge is provided, comprising:

[0060] Step 1: If Figure 3 As shown, a finite element analysis model of a bolt-connected composite beam is established, which includes a reinforced concrete bridge deck, a steel main beam, and bolts. The reinforced concrete bridge deck and the steel main beam are connected by bolts.

[0061] Step 2: Parameterize the key parameters of the composite beam finite element model;

[0062] Step 3: If Figure 4 As shown in the figure, the key parameters of the finite element model include the bridge deck thickness t, the steel main beam spacing l, the main beam transverse stiffening rib thickness m, the stud longitudinal spacing s, the stud diameter d, the stud height h, etc.

[0063] Step 4: The connection relationship between the various parts of the finite element model is as follows: the bolt and the upper flange of the steel main beam are in binding contact, the bolt and the surface of the hole in the concrete bridge deck are in friction contact without normal penetration, and the steel beam and the lower surface of the concrete bridge deck are in friction contact without normal penetration;

[0064] Step 5: In the composite beam finite element model, the steel beam, concrete bridge deck, and studs are modeled according to actual size and are simulated using solid elements. The steel beam material model is bilinear, the stud material is plastic, and the plasticity curve is determined according to the actual pull-out test. The bridge deck material is a plastic damage model, and the damage model curve is determined according to the actual concrete material type.

[0065] Step 6: Input the real load and boundary conditions into the finite element model for analysis to obtain the lift-off force effect value of each bolt;

[0066] Step 7: If Figure 5 As shown, a concrete test block model is made of bridge deck concrete material, and studs are embedded in the concrete test block model to make a stud pull-out bearing capacity test model;

[0067] Step 8: Conduct a bolt pull-out test in the laboratory to obtain the anchorage bearing capacity of the bolt in the concrete;

[0068] Step 9: Obtain the optimal parameter combination of steel-concrete composite beams through finite element analysis, such as Figure 6 , Figure 7 and Figure 8 As shown in the figure, the optimal diameter and buried depth of the bolts are obtained through the bolt lifting test. Thus, the optimal design method of bolt anti-lifting for specific steel-concrete composite beam bridges is obtained.

[0069] In the third embodiment of the present invention, in order to better implement the method provided in the embodiment of the present invention, the embodiment of the present invention also provides a device based on the above method. The meanings of the terms are the same as those in the above method, and the specific implementation details can refer to the description in the method embodiment.

[0070] See also Fig. 9 , Fig. 9 A schematic diagram of the structure of a device provided in an embodiment of the present invention, wherein the device 900 may include a finite element model building module 901, an analysis module 902, a test module 903 and an optimization module 904, wherein:

[0071] The finite element model building module 901 is used to build a finite element analysis model of a bolt-connected composite beam and parameterize target parameters of the finite element analysis model of the composite beam;

[0072] The analysis module 902 is used to determine the connection relationship between the various parts of the composite beam finite element analysis model, input the real load and boundary conditions into the composite beam finite element analysis model for analysis, and obtain the lifting force effect value of each stud;

[0073] A test module 903 is used to perform a bolt pull-out bearing capacity test on a bolt anchor test model to obtain the anchor bearing capacity of the bolt in concrete;

[0074] The optimization module 904 is used to check that the lifting force effect value of each stud does not exceed the anchorage bearing capacity of the stud in the concrete, obtain the optimal parameter combination of the steel-concrete composite beam through finite element analysis, and obtain the optimal diameter and embedment depth arrangement of the stud through the stud pull-out bearing capacity test.

[0075] The specific implementation of each module can refer to the description of the above method embodiment, and the embodiment of the present invention will not be repeated.

[0076] In a fourth embodiment of the present invention, the present invention further provides a computer device, such as Fig.10 As shown, it shows a schematic diagram of the structure of a computer device involved in an embodiment of the present invention, specifically:

[0077] The computer device may include components such as a processor 1001 with one or more processing cores, a memory 1002 with one or more computer-readable storage media, a power supply 1003, and an input unit 1004. Those skilled in the art will appreciate that Fig.10 The computer device structure shown in the figure does not constitute a limitation on the computer device, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently. Among them:

[0078] The processor 1001 is the control center of the computer device. It uses various interfaces and lines to connect various parts of the entire computer device. By running or executing software programs and / or modules stored in the memory 1002 and calling data stored in the memory 1002, it executes various functions of the computer device and processes data, thereby monitoring the computer device as a whole. Optionally, the processor 1001 may include one or more processing cores; preferably, the processor 1001 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operation storage medium, user interface and application program, etc., and the modem processor mainly processes wireless communication. It is understandable that the above-mentioned modem processor may not be integrated into the processor 1001.

[0079] The memory 1002 can be used to store software programs and modules. The processor 1001 executes various functional applications and data processing by running the software programs and modules stored in the memory 1002. The memory 1002 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating storage medium, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area may store data created according to the use of the computer device, etc. In addition, the memory 1002 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices. Accordingly, the memory 1002 may also include a controller to provide the processor 1001 with access to the memory 1002.

[0080] The computer device also includes a power supply 1003 for supplying power to various components. Preferably, the power supply 1003 can be logically connected to the processor 1001 through a power management storage medium, so as to manage charging, discharging, and power consumption through the power management storage medium. The power supply 1003 can also include any components such as one or more DC or AC power supplies, recharge storage media, power failure detection circuits, power converters or inverters, and power status indicators.

[0081] The computer device may further include an input unit 1004, which may be used to receive input digital or character information and generate keyboard, mouse, joystick, optical or trackball signal input related to user settings and function control.

[0082] Although not shown, the computer device may further include a display unit, etc., which will not be described in detail herein. Specifically in this embodiment, the processor 1001 in the computer device will load the executable files corresponding to the processes of one or more application programs into the memory 1002 according to the following instructions, and the processor 1001 will run the application programs stored in the memory 1002, thereby implementing the steps in the above method embodiment.

[0083] A person of ordinary skill in the art will appreciate that all or part of the steps in the various methods of the above embodiments may be completed by instructions, or by controlling related hardware through instructions. The instructions may be stored in a computer-readable storage medium and loaded and executed by a processor.

[0084] To this end, an embodiment of the present invention provides a computer-readable storage medium on which a computer program is stored. The computer program is loaded by a processor to execute the steps in any method provided by the embodiment of the present invention.

[0085] The specific implementation of the above operations can be found in the previous embodiments, which will not be described in detail here.

[0086] The computer-readable storage medium may include: a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0087] Since the computer program stored in the computer-readable storage medium can execute the steps in any method provided in the embodiments of the present invention, the beneficial effects that can be achieved by any method provided in the embodiments of the present invention can be achieved. Please refer to the previous embodiments for details and will not be repeated here.

[0088] The above is a detailed introduction to the anti-lifting optimization design analysis method, device, equipment and medium for the steel-concrete composite beam bridge bolts provided in an embodiment of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for technical personnel in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for optimizing the anti-lifting design of bolts in a steel-concrete composite beam bridge, characterized in that: include: Establish a finite element analysis model of bolt-connected composite beams and parameterize the target parameters of the finite element analysis model of composite beams; Determine the connection relationship between the various parts of the composite beam finite element analysis model, input the real load and boundary conditions into the composite beam finite element analysis model for analysis, and obtain the lifting force effect value of each stud; The bolt pull-out bearing capacity test is carried out on the bolt anchor test model to obtain the anchor bearing capacity of the bolt in the concrete. The lifting force effect value of each stud is checked to be no greater than the anchorage bearing capacity of the stud in the concrete. The optimal parameter combination of the steel-concrete composite beam is obtained through finite element analysis. The optimal diameter and buried depth arrangement of the studs are obtained through stud pull-out bearing capacity tests.

2. The method according to claim 1, characterized in that The composite beam finite element analysis model comprises a reinforced concrete bridge deck, a steel main beam and bolts, wherein the reinforced concrete bridge deck and the steel main beam are connected by the bolts.

3. The method according to claim 2, characterized in that The connection relationship between the various parts of the composite beam finite element analysis model is as follows: the bolts and the upper flange of the steel main beam are in binding contact, the bolts and the surface of the holes in the reinforced concrete bridge deck are in friction contact that cannot be penetrated normally, and the steel beam and the lower surface of the reinforced concrete bridge deck are in friction contact that cannot be penetrated normally.

4. The method according to claim 3, characterized in that The target parameters of the composite beam finite element analysis model include: reinforced concrete bridge deck thickness, steel main beam spacing, steel main beam transverse stiffening rib thickness, stud longitudinal spacing, stud diameter and stud height.

5. The method according to claim 4, characterized in that In the composite beam finite element analysis model, the steel main beam, reinforced concrete bridge deck and bolts are modeled according to actual size and are simulated using solid units. The steel main beam material model is bilinear, the bolt material is plastic, and the reinforced concrete bridge deck material is a plastic damage model.

6. The method according to claim 5, characterized in that The plasticity curve is determined according to the actual pull-out test, and the damage model curve is determined according to the actual concrete material type.

7. The method according to claim 6, characterized in that The bolt pull-out bearing capacity test is performed on the bolt anchor test model to obtain the anchor bearing capacity of the bolt in the concrete, including: A concrete test block model is made of bridge deck concrete material, and bolts are embedded in the concrete test block model to make a bolt pull-out bearing capacity test model; The bolt pull-out test was carried out in the laboratory to obtain the anchorage bearing capacity of the bolt in concrete.

8. An optimization design and analysis device for preventing the lifting of bolts in a steel-concrete composite beam bridge, characterized in that: include: The finite element model building module is used to build a finite element analysis model of a bolt-connected composite beam and parameterize the target parameters of the finite element analysis model of the composite beam; The analysis module is used to determine the connection relationship between the various parts of the composite beam finite element analysis model, input the real load and boundary conditions into the composite beam finite element analysis model for analysis, and obtain the lifting force effect value of each stud; The test module is used to perform a bolt pull-out bearing capacity test on a bolt anchor test model to obtain the anchor bearing capacity of the bolt in concrete; The optimization module is used to check that the lifting force effect value of each stud does not exceed the anchorage bearing capacity of the stud in the concrete. The optimal parameter combination of the steel-concrete composite beam is obtained through finite element analysis, and the optimal diameter and buried depth arrangement of the studs are obtained through stud pull-out bearing capacity tests.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method according to any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the method according to any one of claims 1 to 7.

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