Model conversion method for building steel structure calculation and analysis and conversion tool thereof

Abstract

The invention relates to a model conversion method and tool for calculation and analysis of a building steel structure, based on a CAD drawing file of the building steel structure, the model conversion method for calculation and analysis of the building steel structure comprises the following steps: obtaining a CAD drawing file of the building steel structure; the method comprises the following steps: S1, defining a CAD graph layer naming rule according to modeling attributes required by an ANSYS computational analysis model, and renaming each graph layer in a CAD drawing file based on the CAD graph layer naming rule; s2, utilizing an AutoCAD secondary development technology to extract modeling information from the layer naming; s3, based on the extracted modeling information, generating an ANSYS calculation and analysis model according to a layer corresponding relation; the construction steel structure modeling pretreatment information is recorded in CAD layer naming, modeling data is directly extracted to ANSYS through an AutoCAD secondary development technology, an ANSYS calculation and analysis model is generated to conduct finite element analysis of the construction steel structure, the data barriers of ANSYS and AutoCAD are broken through, and rapid calculation and analysis of modeling of the construction steel structure and construction process simulation are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of engineering construction, and in particular to a model conversion method and a tool thereof for calculation and analysis of building steel structures. Background Art

[0002] Building steel structures have the advantages of light form, rich shapes and flexible spatial layout. They are widely used in large public buildings such as stadiums, high-speed railway stations, airport terminals, theaters, convention and exhibition centers, and play an important role in the urban economic development. In the process of design and construction of building steel structures, numerical software must be used to carry out full-process calculation simulation. To ensure that the calculation results can accurately reflect the mechanical properties of the structure, the engineering information of the building steel structure, such as materials, cross-sections, and construction stage groupings, should be truly mapped to the structural numerical model.

[0003] The existing ANSYS (finite element model analysis software) is suitable for the calculation and analysis of the construction process of building steel structures. There are two command streams for modeling: GUI (graphical user interface) and APDL (parametric design language). However, modeling through its GUI or APDL command stream method has the problem of huge pre-processing workload, and the subsequent adjustment and optimization of the model is relatively complicated. Although software such as 3D3S developed based on AutoCAD can export the calculation and analysis model as an ANSYS macro file to overcome this problem, it is unable to record the component construction grouping information, which is not convenient for construction process simulation analysis. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art, provide a model conversion method and conversion tool for calculation and analysis of building steel structures, and solve the problem of inconvenience in simulation and analysis of the construction process of building steel structures in the prior art.

[0005] To achieve the above object, the present invention provides a model conversion method for building steel structure calculation and analysis. Based on the CAD drawing file of the building steel structure, the model conversion method for building steel structure calculation and analysis comprises the following steps:

[0006] S1. Define a CAD layer naming rule according to the modeling attributes required by the ANSYS calculation and analysis model, and rename each layer in the CAD drawing file based on the CAD layer naming rule;

[0007] S2, using AutoCAD secondary development technology to extract modeling information from layer naming;

[0008] S3. Generate an ANSYS calculation and analysis model based on the extracted modeling information and the layer correspondence.

[0009] By adopting this technical solution, the layer information is recorded in the layer name by defining the CAD layer naming rules, and the modeling information is directly extracted from the layer name to ANSYS using AutoCAD's secondary development technology, and the finite element model is directly modeled, calculated and read. This reduces the difficulty of calculation and analysis of building steel structures.

[0010] Further, step S3 includes:

[0011] According to the extracted modeling information, construct arrays and variables of corresponding model information;

[0012] Generate ANSYS parametric modeling language text based on model information arrays and variables;

[0013] The ANSYS calculation and analysis model is obtained.

[0014] By adopting this technical solution, it is ensured that the modeling information obtained from the layer naming information can not only derive the ANSYS calculation and analysis model, but also can be used in conjunction with the ANSYS calculation and analysis model to simulate the construction process, thereby realizing the construction process simulation analysis of the building steel structure.

[0015] Furthermore, the CAD layer naming rule in step S1 includes: naming according to the unit type number of the component contained in the layer, the construction step division number, the material property number, the section type and the corresponding size information.

[0016] By adopting this technical solution, layer naming can directly feedback the unit type number, construction step division number, material property number, section type and corresponding size information. After being extracted by AutoCAD secondary development technology, the ANSYS APDL command stream can be automatically generated to directly complete the modeling, calculation and construction process simulation analysis of the finite element model, ensuring the efficiency of the calculation and analysis of the building steel structure and the quality of the construction results.

[0017] Furthermore, the unit type numbering format is "unit type name of component + digital number of the unit type name"; when executing step S3, the unit type name and digital number of the unit type name of the unit type number of the component in each layer are extracted and assigned to the unit type name and digital number attributes of the unit type name of the corresponding component in the corresponding layer in the ANSYS calculation and analysis model.

[0018] By adopting this technical solution, the layer naming contains the unit type name of the component required for generating ANSYS calculation and analysis models and performing construction process simulation, as well as the digital number of the unit type name, thereby reducing the intermediate information processing flow to increase the efficiency of modeling and generating construction process simulation data.

[0019] Furthermore, the construction step division numbering format is "the component grouping names divided according to different construction steps and the digital numbers of the component grouping names"; when executing step S3, the component grouping names divided according to different construction steps and the digital numbers of the component grouping names of the components in each layer are extracted, and the corresponding components in the corresponding layers in the ANSYS calculation and analysis model are grouped, and the component grouping names and the digital numbers of the component grouping names of each group are recorded.

[0020] By adopting this technical solution, the layer naming contains the component grouping names divided by different construction steps and the digital numbers of the component grouping names required for generating ANSYS calculation and analysis models and conducting construction process simulation, thereby reducing the intermediate information processing flow to increase the efficiency of modeling and obtaining construction process simulation data.

[0021] Furthermore, the material property numbering format is "material type and characteristic parameter name related to the material type"; when executing step S3, the material type and characteristic parameter name related to the material type of the component in each layer are extracted, and assigned to the material type and characteristic parameter name attribute of the corresponding component in the corresponding layer in the ANSYS calculation and analysis model.

[0022] By adopting this technical solution, the layer naming contains the material types and characteristic parameter names related to the material types required for generating ANSYS calculation and analysis models and conducting construction process simulation, reducing the intermediate information processing flow to increase the efficiency of modeling and obtaining construction process simulation data.

[0023] Furthermore, the cross-sectional type and the corresponding dimension format are "cross-sectional shape and detailed dimensions of the cross-sectional shape", wherein the detailed dimensions of the cross-sectional shape are expressed by multiplying the key dimensions of the cross-sectional area; when executing step S3, the cross-sectional shape and the detailed dimensions of the cross-sectional shape of the component in each layer are extracted, and assigned to the cross-sectional shape and the detailed dimension attributes of the cross-sectional shape of the corresponding component in the corresponding layer in the ANSYS calculation and analysis model.

[0024] By adopting this technical solution, the cross-sectional shape and detailed dimensions of the cross-sectional shape required for generating ANSYS calculation and analysis models and simulating the construction process can be included in the layer naming, reducing the intermediate information processing flow to increase the efficiency of modeling and obtaining construction process simulation data.

[0025] Furthermore, the process of generating the ANSYS calculation and analysis model from step S2 to step S3 also includes the determination of overlapping nodes and repeated line segments.

[0026] By adopting this technical solution, the correlation between layers can be increased by determining node overlap and line segment duplication, thereby ensuring the accuracy of the ANSYS calculation and analysis model.

[0027] The present invention also provides a model conversion tool for calculation and analysis of building steel structures, comprising a memory and a processor; the memory stores a computer-readable program that can be executed by the processor; when the processor executes the computer-readable program, it implements the model conversion method for calculation and analysis of building steel structures as described in any one of claims 1-8.

[0028] By adopting this technical solution, the model conversion tool realizes the automation of model conversion, thereby increasing the efficiency of modeling and calculation and analysis of the construction process of building steel structures.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The pre-processing information of building steel structure modeling is recorded in the CAD layer naming, and the modeling data is directly extracted to ANSYS through AutoCAD secondary development technology, so as to generate an ANSYS calculation and analysis model for finite element analysis of building steel structure, break through the data barriers between ANSYS and AutoCAD, and realize the rapid calculation and analysis of building steel structure modeling and construction process simulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the steps for automatically generating an ANSYS calculation and analysis model in the present invention;

[0032] Figure 2 This is a schematic diagram of the composition of the Excel file in the present invention;

[0033] Figure 3 It is a schematic diagram of the operation and principle of the determination module in the present invention;

[0034] Figure 4 Schematic diagram of a single-layer lattice shell in an embodiment of the present invention;

[0035] Figure 5 It is a schematic diagram of the structural construction hoisting division in an embodiment of the present invention;

[0036] Figure 6 It is a cloud diagram of structural displacement at each construction stage in the embodiment of the present invention;

[0037] Figure 7 It is a structural stress cloud diagram at each construction stage in the embodiment of the present invention. DETAILED DESCRIPTION

[0038] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0039] The present invention provides a model conversion method for calculation and analysis of building steel structures. Based on the CAD drawing file of the building steel structure, the model conversion method for calculation and analysis of the building steel structure comprises the following steps: S1, defining a CAD layer naming rule according to the modeling attributes required by the ANSYS calculation and analysis model, and renaming each layer in the CAD drawing file based on the CAD layer naming rule; S2, extracting modeling information from the layer naming by using the AutoCAD secondary development technology; S3, generating an ANSYS calculation and analysis model according to the layer correspondence relationship based on the extracted modeling information;

[0040] By defining CAD layer naming rules, the layer information is recorded in the layer name. The secondary development technology of AutoCAD is used to directly extract the modeling information from the layer name to ANSYS, and the finite element model is directly modeled, calculated and read. This reduces the difficulty of calculation and analysis of building steel structures.

[0041] Furthermore, step S3 includes: constructing arrays and variables of corresponding model information according to the extracted modeling information; generating ANSYS parametric modeling language text based on the model information array and variables; obtaining the ANSYS calculation and analysis model; the construction of arrays and variables ensures that the modeling information obtained from the layer naming information can not only obtain the ANSYS calculation and analysis model, but also cooperate with the ANSYS calculation and analysis model to simulate the construction process, thereby realizing the construction process simulation analysis of the building steel structure.

[0042] Furthermore, the CAD layer naming rules in step S1 include: naming according to the unit type number, construction step division number, material property number, section type and corresponding size information of the component contained in the layer; the layer naming can directly feedback the unit type number, construction step division number, material property number, section type and corresponding size information, and after being extracted by AutoCAD secondary development technology, it can automatically generate ANSYS APDL command stream to directly complete the modeling, calculation and construction process simulation analysis of the finite element model, thereby ensuring the efficiency of calculation and analysis of the building steel structure and the quality of the construction results.

[0043] Furthermore, the unit type numbering format is "unit type name of component + digital number of unit type name"; when executing step S3, the unit type name of the unit type number of the component in each layer and the digital number of the unit type name are extracted, and assigned to the unit type name of the corresponding component in the corresponding layer in the ANSYS calculation and analysis model and the digital number attribute of the unit type name; so that the layer naming contains the unit type name of the component required for generating ANSYS calculation and analysis model modeling and construction process simulation and the digital number of the unit type name, thereby reducing the intermediate information processing flow to increase the efficiency of modeling and generating construction process simulation data.

[0044] For example, in the naming of the building steel structure CAD layer in the present application, the "unit type name of the component and the digital number of the unit type name" is "E Num".

[0045] Furthermore, the construction step division numbering format is "component group names divided according to different construction steps and digital numbers of component group names"; when executing step S3, the component group names divided according to different construction steps and the digital numbers of the component group names of the components in each layer are extracted, and the corresponding components in the corresponding layers in the ANSYS calculation and analysis model are grouped, and the component group names and the digital numbers of the component group names of each group are recorded; so that the layer naming contains the component group names divided according to different construction steps and the digital numbers of the component group names required for generating ANSYS calculation and analysis model modeling and construction process simulation, thereby reducing the intermediate information processing flow to increase the efficiency of modeling and obtaining construction process simulation data.

[0046] For example, in the naming of the building steel structure CAD layer of the present application, the "digital number of the component grouping name divided by different construction steps" is "S Num".

[0047] Furthermore, the material attribute numbering format is "material type and characteristic parameter name related to the material type"; when executing step S3, the material type and characteristic parameter name related to the material type of the component in each layer are extracted, and assigned to the material type and characteristic parameter name attribute of the corresponding component in the corresponding layer in the ANSYS calculation and analysis model; so that the layer naming contains the material type and characteristic parameter name related to the material type required for generating the ANSYS calculation and analysis model and performing construction process simulation, thereby reducing the intermediate information processing flow to increase the efficiency of modeling and obtaining construction process simulation data.

[0048] For example, in the naming of the building steel structure CAD layer of the present application, the "material type and the characteristic parameter name related to the material type" is one of "Mc Num" or "Ms Num"; if the component is made of concrete material, it is expressed as "Mc Num", where the content corresponding to "Num" is the concrete grade value; if the component is made of steel, it is expressed as "Ms Num", where the content corresponding to "Num" is the yield strength value of the steel.

[0049] Furthermore, the cross-sectional type and the corresponding dimension format is "cross-sectional shape cross-sectional shape detailed dimensions", wherein the cross-sectional shape detailed dimensions are expressed by multiplying the key dimensions of the cross-sectional area; when executing step S3, the cross-sectional shape and the detailed dimensions of the cross-sectional shape of the component in each layer are extracted, and assigned to the cross-sectional shape and the detailed dimension attributes of the cross-sectional shape of the corresponding component in the corresponding layer in the ANSYS calculation and analysis model; so that the layer naming contains the cross-sectional shape and the detailed dimensions of the cross-sectional shape required for generating the ANSYS calculation and analysis model and simulating the construction process, thereby reducing the intermediate information processing flow to increase the efficiency of modeling and obtaining construction process simulation data.

[0050] For example, in the naming of the building steel structure CAD layer of this application, there are seven main cross-sectional shapes in the "cross-sectional shape and detailed dimensions of the cross-sectional shape", namely H, R, P, C, T, FC and FR. The detailed dimensions of each cross-sectional shape are expressed by multiplying the key dimensions of the cross-sectional area, as shown in the following table:

[0051]

[0052]

[0053] Furthermore, in step S2, AutoCAD.NET framework and C# language are selected for secondary development, taking advantage of the .NET framework's object-oriented, easy to maintain and upgrade advantages, and making use of the powerful libraries and interfaces in the .NET Framework to meet the expected functions; according to the general principles followed by the C# program system design, the program is divided into different functional parts according to the function to achieve code reuse, which helps to improve the maintainability of the program and enhance the scalability of the system.

[0054] In order to ensure the accuracy of the ANSYS calculation and analysis model, the process of generating the ANSYS calculation and analysis model from step S2 to step S3 also includes node coincidence determination and line segment duplication determination;

[0055] Furthermore, node overlap determination is achieved by setting a threshold value. When extracting modeling information of the previous layer, all line segment nodes in the previous layer are recorded synchronously. When extracting modeling information of the next layer, all line segment nodes in the next layer are recorded synchronously. Take any line segment node among all line segment nodes in the previous layer as the first node, take any line segment node among all line segment nodes in the next layer as the second node, and calculate the distance between the first node and the second node. If the distance between the first node and the second node is less than the set threshold value, the first node and the second node are determined to be node overlap, otherwise they are determined to be node non-overlap, and so on. Repeat the comparison until all line segment nodes in the previous layer are compared.

[0056] Furthermore, the line segment duplication judgment is based on the node coincidence judgment, which is achieved by simultaneously recording the two nodes generated at both ends of the line segment. If the two nodes of any line segment in the next layer coincide with the two nodes of any line segment in the previous layer, then the two line segments in the next layer and the previous layer are judged to be duplicated, otherwise the two line segments are judged to be non-duplicate, and so on, and the comparison is repeated until all the line segments in the previous layer are compared.

[0057] The present invention also provides a model conversion tool for building steel structure calculation and analysis, comprising a memory and a processor; the memory stores a computer-readable program that can be executed by the processor; when the processor executes the computer-readable program, the model conversion method for building steel structure calculation and analysis according to any one of claims 1 to 8 is implemented, based on the structure information and layer information read from AutoCAD, the ANSYS calculation and analysis model (APDL command stream) is automatically generated, and the steps are shown in the attached figure. Figure 1 shown.

[0058] Furthermore, this model conversion tool is based on AutoCAD secondary development technology and ANSYS, and can divide the program into two modules: modeling structure information extraction and modeling command generation. Methods are written for the two modules respectively, and variables LayerTable, LineTable, PointTable and TotalTable are used to store the structural model information of four levels: layer, component, node and overall. When calling the steel structure modeling software, two function commands can be added in AutoCAD: the "get2excel" command extracts the structural information and stores it in an Excel file; the "ansysmodel" command generates ANSYS APDL based on the extracted modeling information and stores it in the modeling file.

[0059] Furthermore, when extracting modeling structure information from layer names, the model conversion tool reads the overall information of the steel structure, node information, component information and layer information respectively and stores them in different tables of the Excel file. For example, please refer to the attached Figure 2.

[0060] Furthermore, the model conversion tool adds a node overlap determination module and a line segment duplication determination module to ensure the accuracy of the ANSYS model. For example, the determination module runs as shown in the attached figure. Figure 3 As shown, the node overlap judgment module takes a line segment node overlap judgment as an example. After setting the threshold d0, the line segment node i in the previous layer is recorded synchronously when the modeling information of the previous layer is extracted, and the line segment node j in the next layer is recorded synchronously when the modeling information of the next layer is extracted. The distance between the line segment node i and the line segment node j is calculated. If the distance between the line segment node i and the line segment node j is less than the set threshold d0, the line segment node i and the line segment node j are determined to be node overlap, otherwise it is determined that the nodes are not overlapped;

[0061] The operation of the line segment duplication judgment module is based on the node coincidence judgment module. Taking a line segment duplication judgment as an example, the two nodes i generated by the line segment in the previous layer are recorded synchronously when the modeling information of the previous layer is extracted. The two nodes j generated by the line segment in the next layer are recorded synchronously when the modeling information of the next layer is extracted. If the two nodes i generated by the line segment in the previous layer respectively meet the coincidence judgment with the two nodes j generated by the line segment in the next layer, then the line segment with the two nodes i as endpoints in the previous layer and the line segment with the two nodes j as endpoints in the next layer are repeated, otherwise the line segment is judged as non-repeated.

[0062] Example:

[0063] Take a single-layer spherical lattice shell structure as an example. The structure has a longitudinal span of 79.0m, a transverse span of 56.7m, a height of 15.7m, and a building area of ​​approximately 3518m2. Figure 4 As shown, the Kvit-Link square grid is used, the inner 14 rings are three-dimensional grid type spherical lattice shells (Kvit K6 type), and the outer 2 rings are Link square grids;

[0064] In order to ensure the construction safety and installation accuracy of the structure, it is necessary to carry out structural construction process analysis, simulate the changes in the internal force and displacement of the structure during the entire construction process, and verify the safety of the construction conditions; the single-layer spherical lattice shell is divided into 12 installation pieces, and the structural construction hoisting divisions are as follows: Figure 5 As shown;

[0065] According to the construction sequence of installation from inside to outside, the entire construction process of the single-layer spherical lattice shell structure is divided into 14 construction progresses. The description of each construction progress and working condition is shown in the following table:

[0066]

[0067]

[0068] By using the model conversion method and conversion tool of the present invention, an ANSYS calculation and analysis model of the steel structure is automatically established, and the grouping of 14 construction steps is completed. The lattice shell material uses an ideal elastic-plastic constitutive model; all components are simulated using BEAM189 units, obeying the Timoshenko beam theory, considering the influence of shear deformation, and are suitable for simulating slender and medium-slender components; each component is divided into 5 sections, which can accurately describe the deformation and internal force of the component; the bottom V-shaped support and the ground are both hinged.

[0069] According to the construction plan, the birth-death unit method was used to carry out numerical simulation of 14 construction conditions of this single-layer spherical lattice shell. The structural displacement cloud diagram and stress cloud diagram at each construction stage are shown as follows: Figure 6 and Figure 7 As shown, an replaces the construction progress number 1-14, and the results of the maximum axial force, maximum stress and maximum vertical displacement of the structure are summarized in the following table:

[0070]

[0071] The maximum displacement of the structure occurs at the nodes of the outermost 16 rings of the lattice shell (construction step 10) and the nodes close to the 3 / 4 ring (the remaining construction steps). The maximum displacement of the structure during the entire construction process is 0.110m, and the deflection-span ratio is 1 / 718, which is less than the deflection-span ratio limit of 1 / 400 specified in the "Technical Code for Spatial Grid Structures" JGJ 7-2010, and meets the requirements of the specification.

[0072] It can be seen that: 1. The maximum axial force of the structure is concentrated on the annular components of the structure, and the maximum stress at each stage is less than the design strength of the components, meeting the strength requirements of the main structure;

[0073] 2. The maximum axial force of the tire frame is less than 100kN, which is less than the stable bearing capacity of the tire frame, which is 254kN, and meets the requirements of the stability bearing capacity of the tire frame;

[0074] 3. The stress of the structure is the greatest during construction steps 6, 7, and 8 (lifting pieces 7 / 8, welding of the patch between 7 / 8, and lifting pieces 9 / 10 / 11 / 12), and is concentrated on individual rods at the support position of the tire frame, which should be paid attention to;

[0075] 4. After unloading, the component stress ratio is less than 0.1, and the internal force level of the structure is relatively low.

[0076] The present invention is described in detail above in conjunction with the embodiments of the accompanying drawings. A person skilled in the art can make various variations of the present invention according to the above description. Therefore, certain details in the embodiments should not constitute a limitation of the present invention, and the scope of protection of the present invention shall be defined by the scope of the attached claims.

Claims

1. A model conversion method for calculation and analysis of building steel structures, based on the CAD drawing file of the building steel structure, characterized in that: The model conversion method for building steel structure calculation and analysis comprises the following steps: S1. Define a CAD layer naming rule according to the modeling attributes required by the ANSYS calculation and analysis model, and rename each layer in the CAD drawing file based on the CAD layer naming rule; S2, using AutoCAD secondary development technology to extract modeling information from layer naming; S3. Generate an ANSYS calculation and analysis model based on the extracted modeling information and the layer correspondence.

2. The model conversion method for building steel structure calculation and analysis according to claim 1 is characterized in that: Step S3 includes: According to the extracted modeling information, construct arrays and variables of corresponding model information; Generate ANSYS parametric modeling language text based on model information arrays and variables; The ANSYS calculation and analysis model is obtained.

3. The model conversion method for building steel structure calculation and analysis according to claim 1 is characterized in that: The CAD layer naming rules in step S1 include: naming according to the unit type number of the component contained in the layer, the construction step division number, the material property number, the section type and the corresponding size information.

4. The model conversion method for building steel structure calculation and analysis according to claim 3 is characterized in that: The unit type numbering format is "unit type name of component + digital number of the unit type name"; when executing step S3, the unit type name and digital number of the unit type name of the unit type number of the component in each layer are extracted and assigned to the unit type name and digital number attributes of the unit type name of the corresponding component in the corresponding layer in the ANSYS calculation and analysis model.

5. The model conversion method for building steel structure calculation and analysis according to claim 3 is characterized in that: The construction step division numbering format is "the component grouping names divided according to different construction steps and the digital numbers of the component grouping names"; when executing step S3, the component grouping names divided according to different construction steps and the digital numbers of the component grouping names of the components in each layer are extracted, and the corresponding components in the corresponding layers in the ANSYS calculation and analysis model are grouped, and the component grouping names and the digital numbers of the component grouping names of each group are recorded.

6. The model conversion method for building steel structure calculation and analysis according to claim 3 is characterized in that: The material property numbering format is "material type and characteristic parameter name related to the material type"; when executing step S3, the material type and characteristic parameter name related to the material type of the component in each layer are extracted, and assigned to the material type and characteristic parameter name attribute of the corresponding component in the corresponding layer in the ANSYS calculation and analysis model.

7. The model conversion method for building steel structure calculation and analysis according to claim 3 is characterized in that: The cross-sectional type and the corresponding dimension format are "cross-sectional shape, detailed dimensions of the cross-sectional shape", wherein the detailed dimensions of the cross-sectional shape are expressed in a manner of multiplying the key dimensions of the cross-sectional area; when executing step S3, the cross-sectional shape and the detailed dimensions of the cross-sectional shape of the component in each layer are extracted and assigned to the cross-sectional shape and the detailed dimension attributes of the cross-sectional shape of the corresponding component in the corresponding layer in the ANSYS calculation and analysis model.

8. The model conversion method for building steel structure calculation and analysis according to claim 1 is characterized in that: The process of generating the ANSYS calculation and analysis model from step S2 to step S3 also includes node coincidence determination and line segment duplication determination.

9. A model conversion tool for calculation and analysis of building steel structures, characterized by: It comprises a memory and a processor; the memory stores a computer-readable program that can be executed by the processor; when the processor executes the computer-readable program, it implements the model conversion method for building steel structure calculation and analysis as described in any one of claims 1-8.

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