Bridge large temporary structure parametric modeling system and method thereof

Abstract

The invention discloses a parametric modeling system and method for a bridge large temporary structure, and belongs to the technical field of bridge engineering, and the system comprises a data acquisition module which is used for acquiring design parameters of a preset bridge large temporary structure, and the design parameters comprise a structure size parameter, a material attribute parameter, a load parameter and a construction process parameter; constructing a database based on the design parameters; the data fusion modeling module responds to the database and is used for generating a three-dimensional model of a preset bridge large temporary structure, and the data fusion modeling module comprises a geometric modeling unit, a material attribute assignment unit, a load applying unit and a construction simulation unit; the geometric modeling unit responds to the structure size parameters and is used for generating the geometric shape of the bridge large temporary structure. According to the method, the generated three-dimensional model can be subjected to multi-dimensional verification, mechanical property indexes such as stress, strain and deformation of the structure under the action of various loads are calculated, and the safety and reliability of the structure are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of bridge engineering, in particular to a large temporary bridge structure parameterized modeling system and method thereof. Background Art

[0002] In bridge construction, temporary structures (such as temporary piers, temporary buttresses, temporary supports, etc.) are crucial to ensure the smooth progress and safety of the construction process. In real life, the design of temporary bridge structures is complex and involves multiple temporary structures and components. Through modeling, the accuracy of design and construction can be ensured to a certain extent.

[0003] For research in this area, the application document with application number CN202411768032.6 provides a parametric modeling method for a steel anchor box of a bridge tower at a three-dimensional spatial angle. The technical solution includes establishing a knowledge engineering template for a steel anchor box unit; establishing a knowledge engineering template for input conditions for a steel anchor box unit; inputting parameters of multiple sets of steel anchor box input conditions into the knowledge engineering template for input conditions for the steel anchor box unit to obtain structural models of multiple sets of steel anchor boxes; and performing angle correction on the structural model of the steel anchor box. The technical solution can perform three-dimensional modeling of a bridge tower steel anchor box, present the complex structure of the bridge tower steel anchor box and reduce the generation of errors. At the same time, it can adjust part parameters to modify and optimize the model.

[0004] Another application document with application number CN202211019200.2 provides a method for parametric 3D modeling of spatial M-shaped node reinforcement based on the 3Dexperience platform. The technical solution includes creating a parametric 3D model template of arc beams and cylinders in the M-shaped node area; establishing a node skeleton line model according to the starting point coordinates of the cylinder and the arc beam; calling the template to generate the lod200 3D model of the M-shaped node; upgrading the lod200 model and adjusting the cylinder and arc beam reinforcement and end connection structural parameters to obtain the lod300 3D model of the M-shaped node. This technical solution improves the speed and accuracy of modeling the reinforcement of the spatial M-shaped node; to a certain extent, the reinforcement positioning plate can avoid rework and delay caused by the deviation of the reinforcement position, which can facilitate the understanding of complex node design and improve the efficiency of on-site construction.

[0005] However, the existing technology has low simulation accuracy for the geometric details and construction stages of large temporary structures during modeling. For example, it is difficult to accurately simulate the stress state and deformation of temporary structures at different construction stages, which makes it impossible to verify the modeling of large temporary structures, which is not conducive to improving modeling efficiency and quality. Summary of the invention

[0006] In view of the above problems existing in the technical field of existing bridge engineering, the present invention is proposed.

[0007] Therefore, one of the objectives of the present invention is to provide a parametric modeling system and method for large temporary structures of bridges, which perform multi-dimensional verification on the generated three-dimensional model, calculate mechanical performance indicators such as stress, strain, and deformation of the structure under various loads, and ensure the safety and reliability of the structure.

[0008] To solve the above technical problems, the present invention provides the following technical solutions: On the one hand, the present invention provides a parametric modeling system for large temporary structures of bridges, including: A data acquisition module, which is used to acquire the design parameters of a preset large temporary structure of a bridge. The design parameters include structural dimension parameters, material property parameters, load parameters, and construction process parameters, and a database is constructed based on the design parameters; A data fusion and modeling module, which responds to the database and is used to generate a three-dimensional model of the preset large temporary structure of the bridge. The data fusion and modeling module includes a geometric modeling unit, a material property assignment unit, a load application unit, and a construction simulation unit; The geometric modeling unit responds to the structural dimension parameters and is used to generate the geometric shape of the large temporary structure of the bridge; The material property assignment unit responds to the material property parameters and is used to assign the material property parameters to the corresponding model elements; The load application unit responds to the load parameters and is used to apply the corresponding loads on the three-dimensional model; The construction simulation unit responds to the construction process parameters and is used to simulate the construction process of the three-dimensional model; A model verification module, which is used to perform safety verification on the three-dimensional model. The safety verification includes geometric verification, mechanical verification, and construction verification; The geometric verification is used to verify the geometric shape in the three-dimensional model; The mechanical verification is used to perform mechanical analysis on the three-dimensional model. The mechanical analysis includes calculating the mechanical performance indicators of stress, strain, and deformation of the structure of the preset bridge under various loads; The construction verification responds to the results of the mechanical verification and is used to simulate the construction results according to the mechanical performance indicators and evaluate the safety of the construction.

[0009] As a preferred solution of the present invention, in the geometric verification, the geometric shape in the three-dimensional model is verified, and the verification method includes performing verification through geometric consistency check and / or numerical simulation verification; The geometric consistency check includes comparison with the design drawings, geometric feature check, and symmetry check. Among them, the comparison with the design drawings includes comparing the geometric shapes modeled in the 3D model with the design drawings corresponding to the preset bridge, and the comparison includes checking whether the dimensions, shapes, and positions are consistent. The geometric feature check includes verifying whether there are redundant geometric elements in the shape features of the geometric shapes in the 3D model. The geometric elements include the edges, faces, and integrity of the geometric shapes. The symmetry check includes performing symmetry checks on geometric shapes with symmetry. The numerical simulation verification includes finite element analysis and modal analysis. The finite element analysis includes importing the 3D model into simulation software for finite element analysis and simulating the structural responses of the geometric shapes under actual load conditions. The structural responses include the displacements, stresses, and strains of the geometric shapes. At the same time, preset safety thresholds for the structural responses, compare the simulation results of the finite element analysis with the safety thresholds. If the structural responses of the geometric shapes under actual load conditions are lower than the safety thresholds, the system determines that the structural responses of the preset bridge are in a safe state; otherwise, it does not determine. And mark the load parameters under actual load conditions as reference load parameters. The modal analysis is used to perform modal analysis on the geometric shapes in the 3D model. The modal analysis includes calculating the natural vibration frequencies and vibration modes of the geometric shapes, and presetting reference values based on the natural vibration frequencies and vibration modes. Mark the calculated natural vibration frequencies and vibration modes as theoretical values. When the theoretical values are the same as the reference values, the system determines that the results of the modal analysis of the geometric shapes in the 3D model are accurate; otherwise, the determination results are inaccurate.

[0010] As a preferred solution of the present invention, if the system does not determine that the structural responses of the preset bridge are in a safe state, or the system determines that the results of the modal analysis of the geometric shapes in the 3D model are inaccurate, then in the 3D model, distinguish the geometric shapes into the side-end geometric shapes and the middle-end geometric shapes of the preset bridge. The side-end geometric shapes are the geometric shapes on the left and right sides of the preset bridge. Among the geometric shapes on the left and right sides, distinguish the geometric shape on the left side into , ,..., , where represents the th geometric shape distinguished on the left side of the preset bridge; distinguish the geometric shape on the right side into , ,..., , where The th geometric shape distinguished on the right side of the preset bridge; Obtain the geometric shapes that are higher than the safety threshold under the reference load parameters among the different geometric shapes distinguished on the left and right sides, and mark the geometric shapes as the first risk geometric shapes; and analyze the associated influence of the change of the reference load parameters on the change of the structural response of the first risk geometric shapes.

[0011] As a preferred solution of the present invention, wherein: for the analysis of the associated influence, the analysis method includes analyzing the change of the reference load parameters of the vertical displacement, lateral displacement and torsional displacement of the first risk geometric shapes; wherein: The vertical displacement includes adjusting the reference load parameters of the first risk geometric shape by the bridge deck at the upper end of the first risk geometric shape, and the adjustment method is as follows: On the bridge deck, with the first risk geometric shape as the center point, and the center point is the center point when looking directly at the preset bridge; On the bridge deck, extend 5-6 meters to the left and right based on the center point, and adjust the reference load parameters within the extended range to the left and right; The adjustment is to reduce the load parameters, including taking every 5%-10% reduction of the load parameters as an adjustment interval; Calculate the change of the structural response of the first risk geometric shape in different adjustment intervals until the structural response of the first risk geometric shape is lower than the safety threshold; Upload the load parameters corresponding to the structural response of the first risk geometric shape lower than the safety threshold to the database, and mark the load parameters as ; The lateral displacement includes adjusting the reference load parameters of the first risk geometric shape by the bridge deck at the upper end of the first risk geometric shape, and the adjustment method is as follows: On the bridge deck, with the first risk geometric shape as the center point, and the center point is the center point when looking down at the preset bridge; On the bridge deck, extend 2-4 meters up and down based on the center point, and adjust the reference load parameters within the extended range up and down; The adjustment is to reduce the load parameters, including taking every 5%-10% reduction of the load parameters as an adjustment interval; Calculate the change of the structural response of the first risk geometric shape in different adjustment intervals until the structural response of the first risk geometric shape is lower than the safety threshold; Upload the load parameter corresponding to the structural response of the first risk geometry being lower than the safety threshold to the database, and mark the load parameter as ; The torsional displacement includes the adjustment of the reference load parameter of the first risk geometry by the bridge deck at the upper end of the first risk geometry, and the adjustment method is as follows: Take the first risk geometry as the center point on the bridge deck, and the center point is the center point when looking down at the preset bridge; Extend 1 - 2 meters outward from the center point on the bridge deck, and adjust the reference load parameter within the extended range; The adjustment is to reduce the load parameter, including taking every 5% - 10% reduction of the load parameter as an adjustment interval; Calculate the change in the structural response of the first risk geometry in different adjustment intervals until the structural response of the first risk geometry is lower than the safety threshold; Upload the load parameter corresponding to the structural response of the first risk geometry being lower than the safety threshold to the database, and mark the load parameter as .

[0012] As a preferred solution of the present invention, wherein: in the middle - end geometry, the middle - end geometry is divided into , ,..., , where represents the th geometry divided at the middle end of the preset bridge; and obtain the geometries with a structural response higher than the safety threshold among the divided geometries, and mark these geometries as the second - risk geometries; analyze the associated influence of the change in the reference load parameter on the change in the structural response of the second - risk geometries in the second - risk geometries.

[0013] As a preferred solution of the present invention, wherein: the method of analyzing the associated influence includes adjusting the reference load parameter of the second - risk geometry on the bridge deck at the upper end of the second - risk geometry, and the adjustment method includes taking the second - risk geometry as the center point, and the center point is the center point when looking straight at the preset bridge; In the second - risk geometry, adjust the reference load parameter on the bridge decks at the upper ends of any two geometries. The adjustment is to reduce the load parameter, including taking every 5% - 10% reduction of the load parameter as an adjustment interval, and calculate the change in the structural response of the second - risk geometry in different adjustment intervals until the structural response of the second - risk geometry is lower than the safety threshold; Upload the load parameters corresponding to the structural response of the first risk geometry being lower than the safety threshold to the database, and mark the load parameters as 。

[0014] As a preferred embodiment of the present invention, wherein: the bridge deck at the upper end of the second risk geometry adjusts the reference load parameters for the second risk geometry, and the adjustment method further includes adjusting the reference load parameters between the bridge decks at the upper ends of any two geometries in the second risk geometry. The adjustment is to reduce the load parameters, including taking every 8% - 13% reduction of the load parameters as an adjustment interval, and calculating the change in the structural response of the second risk geometry in different adjustment intervals until the structural response of the second risk geometry is lower than the safety threshold.

[0015] As a preferred embodiment of the present invention, wherein: it further includes a model output module. The model output module responds to the evaluation of the construction verification of the model verification module, and is used to output the format of the three-dimensional model of the preset temporary bridge structure that has passed the evaluation. The output formats include three-dimensional model files, two-dimensional drawing files, and / or design report files.

[0016] On the other hand, the present invention provides a method applied to a parametric modeling system for a temporary bridge structure of a bridge as described above, including the following steps: Obtain the design parameters of the preset temporary bridge structure. The design parameters include structural dimension parameters, material property parameters, load parameters, and construction process parameters, and construct a database based on the design parameters; Generate the three-dimensional model of the preset temporary bridge structure based on the database; including generating the geometry regarding the structural dimension parameters; at the same time, in the three-dimensional model, assign the corresponding model elements to the material property parameters; and apply the corresponding loads on the three-dimensional model according to the load parameters; at the same time, simulate the construction process of the three-dimensional model according to the construction process parameters; Perform safety verification on the three-dimensional model. The safety verification includes geometric verification, mechanical verification, and construction verification; wherein, The geometric verification verifies the geometry in the three-dimensional model; The mechanical verification performs mechanical analysis on the three-dimensional model. The mechanical analysis includes calculating the mechanical performance indexes of the stress, strain, and deformation of the structure of the preset bridge under various loads; The construction verification is based on the results of the mechanical verification, and is used to simulate the construction results according to the mechanical performance indexes and evaluate the safety of the construction; According to the evaluation of construction verification, the three-dimensional model of the preset large temporary structure of the bridge that passes the evaluation is output in a format, and the output formats include three-dimensional model files, two-dimensional drawing files, and / or design report files. Beneficial effects

[0017] The present invention can not only improve the modeling efficiency, but also perform multi-dimensional verification on the generated three-dimensional model, including geometric verification, mechanical verification, and construction verification. Geometric verification ensures that the geometric shape of the model meets the design requirements; mechanical verification calculates mechanical performance indicators such as stress, strain, and deformation of the structure under various loadings through means such as finite element analysis to ensure the safety and reliability of the structure; construction verification simulates the construction process and evaluates the safety and feasibility of construction. During the verification process, the system compares the simulation results of the finite element analysis with the preset safety threshold. Only when the structural response is lower than the safety threshold is the structural response determined to be in a safe state, which helps to timely discover potential safety hazards and ensure the accuracy of the design. During the model verification stage, the load parameters can also be flexibly adjusted, and the changes in the structural response can be observed in real time, enabling the staff to quickly adjust the modeling parameters and optimize the design scheme according to different working conditions and requirements. The system can identify geometric shapes higher than the safety threshold and mark them as risky geometric shapes. By adjusting the load parameters for these risky geometric shapes, the system can find the optimal load parameters that make the structural response lower than the safety threshold, thereby optimizing the load distribution during construction and reducing construction risks. The system calculates the natural vibration frequency and vibration mode of the geometric shape through modal analysis and compares the theoretical values with the reference values, which provides more comprehensive structural performance information for the staff and is conducive to scientific decision-making. Description of the drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them: Figure 1 It is a modular structure schematic diagram of the parametric modeling system for the large temporary structure of the bridge in the embodiment of the present invention; Figure 2 It is a schematic diagram of the method flow in the embodiment of the present invention; Reference numerals in the figure: 110 - data acquisition module; 120 - data fusion and modeling module; 1201 - geometric modeling unit; 1202 - material property assignment unit; 1203 - load application unit; 1204 - construction simulation unit; 130 - model verification module; 140 - model output module. Detailed implementation manners

[0019] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention fall within the scope of protection of the present invention.

[0020] Since the prior art has relatively low simulation accuracy for the geometric details of large temporary structures and the construction stages during modeling, it is difficult to accurately simulate the stress state and deformation of temporary structures in different construction stages, resulting in the inability to verify during the process of modeling large temporary structures, which is not conducive to improving the modeling efficiency and quality.

[0021] Based on this, the present invention proposes a parametric modeling system and method for large temporary structures of bridges, which perform multi-dimensional verification on the generated three-dimensional model and calculate mechanical performance indicators such as stress, strain, and deformation of the structure under various loads to ensure the safety and reliability of the structure.

[0022] The following further specifically describes this solution through embodiments and with reference to the accompanying drawings.

[0023] Referring to Figures 1 to 2 , which is an embodiment of the present invention, this embodiment provides a parametric modeling system for large temporary structures of bridges, including: A data acquisition module 110, configured to acquire design parameters of a preset large temporary structure of a bridge. The design parameters include structural dimension parameters, material property parameters, load parameters, and construction process parameters, and construct a database based on the design parameters; In this embodiment, the structural dimension parameters include pier height, pier diameter, pier spacing, etc.; The material property parameters include concrete strength grade, steel yield strength, etc.; The load parameters include construction load, wind load, seismic load, etc.; The construction process parameters include construction sequence, construction stage, etc.; The data fusion modeling module 120 responds to the database and is used to generate a 3D model of a preset temporary bridge structure. The data fusion modeling module 120 includes a geometric modeling unit 1201, a material property assignment unit 1202, a load application unit 1203, and a construction simulation unit 1204; The geometric modeling unit 1201 responds to the structural dimension parameters and is used to generate the geometric shape of the temporary bridge structure; In this embodiment, for example, for a temporary pier, a 3D model of the pier body can be generated according to parameters such as the pier body height and diameter; for a temporary support, a geometric model of the support can be generated according to parameters such as the shape, size, and spacing of the support; The material property assignment unit 1202 responds to the material property parameters and is used to assign the material property parameters to the corresponding model elements; In this embodiment, it includes assigning properties such as density and elastic modulus of concrete material to the concrete pier body; assigning properties such as yield strength and elastic modulus of steel to the steel structure support; The load application unit 1203 responds to the load parameters and is used to apply the corresponding loads on the 3D model; In this embodiment, it includes applying construction loads on the construction stage model, applying wind loads and seismic loads on the overall model, etc.; The construction simulation unit 1204 responds to the construction process parameters and is used to simulate the construction process of the 3D model; In this embodiment, it includes simulating the erection sequence of the support, the pouring process of the temporary pier, etc., to ensure the feasibility and safety of the construction process; The model verification module 130 is used to verify the safety of the 3D model. The safety verification includes geometric verification, mechanical verification, and construction verification; The geometric verification is used to verify the geometric shape in the 3D model; In this embodiment, it includes checking whether the geometric shape of the 3D model meets the design specifications and whether there are geometric conflicts or unreasonable places. For example, checking whether the spacing of the temporary piers meets the construction requirements and whether the shape of the temporary support matches the bridge structure, etc.; The mechanical verification is used to perform a mechanical analysis on the 3D model. The mechanical analysis includes calculating the mechanical performance indexes of stress, strain, and deformation of the structure of the preset bridge under various load actions; In this embodiment, according to the material properties and design specifications, it is judged whether the structure meets the requirements of strength, stiffness, and stability. For example, using the finite element analysis method to perform a mechanical analysis on the temporary pier to ensure that it does not fail and undergo excessive deformation under construction loads and wind loads; among them, the structure of the preset bridge includes the pier body, abutment, support, etc.; The construction verification responds to the results of the mechanical verification, is used to simulate the construction results according to the mechanical performance indicators, and evaluate the safety of the construction; In this embodiment, for example, check whether the construction sequence is reasonable and whether the structural stability during the construction stage meets the requirements, etc.; In the geometric verification, verify the geometric shape in the three-dimensional model, and the verification methods include geometric consistency check and / or numerical simulation verification; In this embodiment, for example, check whether the span of the bridge, the height of the pier, the cross-sectional dimensions of the beam, etc. are exactly matched with the design drawings; The geometric consistency check includes comparison with the design drawings, geometric feature check, and symmetry check; among them, the comparison with the design drawings includes comparing the geometric shape modeled in the three-dimensional model with the design drawings corresponding to the preset bridge, and the comparison includes checking whether the dimensions, shapes, and positions are consistent; The geometric feature check includes verifying whether there are redundant geometric elements in the shape features of the geometric shape in the three-dimensional model, and the geometric elements include the edges, faces, and integrity of the geometric shape; The symmetry check includes performing symmetry check on geometric shapes with symmetry; The numerical simulation verification includes finite element analysis and modal analysis; The finite element analysis includes importing the three-dimensional model into simulation software for finite element analysis, and simulating the structural response of the geometric shape under actual load conditions. The structural response includes the displacement, stress, and strain of the geometric shape; at the same time, preset a safety threshold for the structural response, and compare the simulation results of the finite element analysis with the safety threshold. If the structural response of the geometric shape under actual load conditions is lower than the safety threshold, the system determines that the structural response of the preset bridge is in a safe state; otherwise, it does not determine; And mark the load parameters under actual load conditions as reference load parameters; The modal analysis is used to perform modal analysis on the geometric shape in the three-dimensional model. The modal analysis includes calculating the natural vibration frequency and vibration mode of the geometric shape, and presetting reference values based on the natural vibration frequency and vibration mode; mark the calculated natural vibration frequency and vibration mode as theoretical values; when the theoretical values are the same as the reference values, the system determines that the result of the modal analysis of the geometric shape in the three-dimensional model is accurate; otherwise, the determination result is inaccurate; In this embodiment, the simulation software includes ANSYS, Midas Civil, etc.; Finite element analysis is a numerical analysis technique that uses mathematical approximation methods to simulate real physical systems. By discretizing the continuum into several finite-sized unit bodies, it simulates and solves actual physical problems. In the process of bridge modeling, finite element analysis can perform structural strength analysis, modal analysis, fatigue and fracture mechanics analysis, etc.; The accuracy of the geometric shape is ensured through various methods such as comparison with the design drawings, geometric feature inspection, and symmetry inspection; Scientific methods such as finite element analysis and modal analysis are adopted to quantitatively evaluate the structural response, improving the scientific nature of the verification; By presetting a safety threshold to evaluate the structural response, the safety of the structure is ensured; In this embodiment, further, if the system does not determine that the structural response of the preset bridge is in a safe state, or the system determines that the result of the modal analysis of the geometric shape in the three-dimensional model is inaccurate, then in the three-dimensional model, the geometric shape is divided into the side-end geometric shape and the middle-end geometric shape of the preset bridge. The side-end geometric shape is the geometric shape on the left and right sides of the preset bridge. Among the geometric shapes on the left and right sides, the geometric shape on the left is divided into , ,... , where represents the th geometric shape divided on the left side of the preset bridge; the geometric shape on the right is divided into , ,... , where represents the th geometric shape divided on the right side of the preset bridge; Among the different geometric shapes divided on the left and right sides, obtain the geometric shapes that are higher than the safety threshold under the reference load parameters, and mark the geometric shapes as the first risk geometric shapes; and analyze the associated influence of the change of the reference load parameters on the change of the structural response of the first risk geometric shapes; Specifically in this embodiment, for the analysis of the associated influence, the analysis method includes analyzing the change of the reference load parameters of the vertical displacement, lateral displacement, and torsional displacement of the first risk geometric shapes; where: The vertical displacement includes adjusting the reference load parameters of the first risk geometric shape by the bridge deck at the upper end of the first risk geometric shape, and the adjustment method is as follows: On the bridge deck, take the first risk geometric shape as the center point, and the center point is the center point when looking directly at the preset bridge; On the bridge deck, extend 5 - 6 meters to the left and right based on the center point, and adjust the reference load parameters within the extended range to the left and right; The adjustment is to reduce the load parameters, including taking every 5% - 10% reduction of the load parameters as an adjustment interval; Calculate the change of the structural response of the first risk geometric shape in different adjustment intervals until the structural response of the first risk geometric shape is lower than the safety threshold; Upload the load parameters corresponding to the structural response of the first risk geometry being lower than the safety threshold to the database, and mark the load parameters as ; The lateral displacement includes the adjustment of the reference load parameters for the first risk geometry by the bridge deck at the upper end of the first risk geometry, and the adjustment method is as follows: Take the first risk geometry as the center point on the bridge deck, and the center point is the center point when looking down at the preset bridge; Extend 2 - 4 meters upward and downward from the center point on the bridge deck, and adjust the reference load parameters within the extended range; Adjust to reduce the load parameters, including taking every 5% - 10% reduction of the load parameters as an adjustment interval; Calculate the change in the structural response of the first risk geometry in different adjustment intervals until the structural response of the first risk geometry is lower than the safety threshold; Upload the load parameters corresponding to the structural response of the first risk geometry being lower than the safety threshold to the database, and mark the load parameters as ; The torsional displacement includes the adjustment of the reference load parameters for the first risk geometry by the bridge deck at the upper end of the first risk geometry, and the adjustment method is as follows: Take the first risk geometry as the center point on the bridge deck, and the center point is the center point when looking down at the preset bridge; Extend 1 - 2 meters outward from the center point on the bridge deck, and adjust the reference load parameters within the extended range; Adjust to reduce the load parameters, including taking every 5% - 10% reduction of the load parameters as an adjustment interval; Calculate the change in the structural response of the first risk geometry in different adjustment intervals until the structural response of the first risk geometry is lower than the safety threshold; Upload the load parameters corresponding to the structural response of the first risk geometry being lower than the safety threshold to the database, and mark the load parameters as ; In this embodiment, looking straight at the preset bridge means looking straight at the bridge deck; looking down at the preset bridge means looking down at the bridge deck; Vertical displacement. When the static load (such as vehicle load) increases, the vertical displacement of the bridge usually increases. For example, in a simply - supported beam bridge, as the vehicle load increases, the vertical deflection at the mid - point of the beam will increase significantly; Lateral displacement. The increase in wind load or lateral vehicle load will cause the lateral displacement of the bridge to increase. Especially for long - span bridges, the lateral displacement is more sensitive to wind load; Torsional displacement. For bridges with complex cross-sections (such as steel truss bridges), wind loads or eccentric loads may cause an increase in torsional displacement; Therefore, in this embodiment, based on vertical displacement, lateral displacement, and torsional displacement, it is of practical significance to analyze the associated influence of the change of reference load parameters on the structural response of the first risk geometry; It should be noted in this embodiment that in the mid-span geometry, the mid-span geometry is divided into , ,..., , where represents the th geometry divided at the mid-span of the preset bridge; and among the divided geometries, the geometries higher than the safety threshold are obtained, and the geometries are marked as the second risk geometries; the associated influence of the change of reference load parameters on the change of the structural response of the second risk geometries is analyzed in the second risk geometries; Furthermore, in this embodiment, the way to analyze the associated influence includes adjusting the reference load parameters on the bridge deck at the upper end of the second risk geometry to the second risk geometry, and the adjustment method includes taking the second risk geometry as the center point, and the center point is the center point when looking straight at the preset bridge; In the second risk geometry, the reference load parameters are adjusted on the bridge decks at the upper ends of any two geometries, and the adjustment is to reduce the load parameters, including taking every 5% - 10% reduction of the load parameters as an adjustment interval, and calculating the change of the structural response of the second risk geometry in different adjustment intervals until the structural response of the second risk geometry is lower than the safety threshold; The load parameters corresponding to the structural response of the first risk geometry lower than the safety threshold are uploaded to the database, and the load parameters are marked as ; It should be emphasized in this embodiment that adjusting the reference load parameters on the bridge deck at the upper end of the second risk geometry to the second risk geometry, and the adjustment method also includes adjusting the reference load parameters between the bridge decks at the upper ends of any two geometries in the second risk geometry, and the adjustment is to reduce the load parameters, including taking every 8% - 13% reduction of the load parameters as an adjustment interval, and calculating the change of the structural response of the second risk geometry in different adjustment intervals until the structural response of the second risk geometry is lower than the safety threshold; In this embodiment, since the reference load parameters are adjusted between the bridge decks at the upper ends of any two geometries, it is necessary to increase the intensity of reducing the load parameters, so as to calculate and analyze the change of the structural response of the second risk geometry at different points; Further, this embodiment further includes a model output module 140. The model output module responds to the evaluation of the construction verification by the model verification module and is used to output the three-dimensional model of the preset temporary bridge structure in a format. The output formats include three-dimensional model files, two-dimensional drawing files, and / or design report files; In this embodiment, format output is performed for subsequent design, construction, and analysis; The three-dimensional model file includes a BIM model file; The two-dimensional drawing file includes construction drawings; The design report file includes a mechanical analysis report.

[0024] Based on the above, the present application can perform multi-dimensional verification on the generated three-dimensional model, including geometric verification, mechanical verification, and construction verification. Geometric verification ensures that the geometric shape of the model meets the design requirements; mechanical verification calculates mechanical performance indicators such as stress, strain, and deformation of the structure under various loadings through means such as finite element analysis to ensure the safety and reliability of the structure; construction verification simulates the construction process and evaluates the safety and feasibility of construction.

[0025] Combined with the above-mentioned parametric modeling system for temporary bridge structures, this embodiment also proposes a working method for this system as follows: Step S10: Obtain the design parameters of the preset temporary bridge structure. The design parameters include structural dimension parameters, material property parameters, load parameters, and construction process parameters, and construct a database based on the design parameters; Step S20: Generate a three-dimensional model of the preset temporary bridge structure based on the database; including generating a geometric shape regarding the structural dimension parameters; at the same time, assign corresponding model elements to the material property parameters in the three-dimensional model; apply corresponding loads to the three-dimensional model according to the load parameters; and simulate the construction process of the three-dimensional model according to the construction process parameters; Step S30: Perform safety verification on the three-dimensional model. The safety verification includes geometric verification, mechanical verification, and construction verification; where, Geometric verification verifies the geometric shape in the three-dimensional model; Mechanical verification performs mechanical analysis on the three-dimensional model. The mechanical analysis includes calculating mechanical performance indicators such as stress, strain, and deformation of the structure of the preset bridge under various loadings; Construction verification is based on the results of mechanical verification and is used to simulate the construction results according to the mechanical performance indicators and evaluate the safety of construction; Step S40: According to the evaluation of the construction verification, output the three-dimensional model of the preset temporary bridge structure that has passed the evaluation in a format. The output formats include three-dimensional model files, two-dimensional drawing files, and / or design report files.

[0026] In summary, the present application can perform multi-dimensional verification on the generated 3D model, including geometric verification, mechanical verification, and construction verification. Geometric verification ensures that the geometric shape of the model meets the design requirements; mechanical verification calculates mechanical performance indicators such as stress, strain, and deformation of the structure under various loads through means such as finite element analysis to ensure the safety and reliability of the structure; construction verification simulates the construction process and evaluates the safety and feasibility of construction.

[0027] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A parametric modeling system for large temporary bridge structures, characterized in that: include: A data acquisition module is used to acquire design parameters of a preset bridge structure, wherein the design parameters include structural size parameters, material property parameters, load parameters and construction process parameters, and to construct a database based on the design parameters; A data fusion modeling module, which responds to the database and is used to generate a three-dimensional model of the preset bridge structure, and includes a geometric modeling unit, a material property assignment unit, a load application unit and a construction simulation unit; The geometric modeling unit is responsive to the structural dimension parameters and is used to generate the geometric shape of the bridge structure; The material property assignment unit responds to the material property parameter and is used to assign the material property parameter to the corresponding model element; The load applying unit is responsive to the load parameter and is used to apply a corresponding load on the three-dimensional model; The construction simulation unit is responsive to the construction process parameters and is used to simulate the construction process of the three-dimensional model; A model verification module, the model verification module is used to perform safety verification on the three-dimensional model, the safety verification includes geometric verification, mechanical verification and construction verification; The geometric verification is used to verify the geometric shape in the three-dimensional model; The mechanical verification is used to perform mechanical analysis on the three-dimensional model, and the mechanical analysis includes calculating mechanical performance indicators of stress, strain and deformation of the structure of the preset bridge under various loads; The construction verification responds to the results of the mechanical verification and is used to simulate the construction results according to the mechanical performance indicators and to evaluate the safety of the construction.

2. A bridge large temporary structure parametric modeling system as claimed in claim 1, characterized in that: In the geometric verification, the geometric shape in the three-dimensional model is verified, and the verification method includes a geometric consistency check and / or a numerical simulation verification method; The geometric consistency check includes comparison with design drawings, geometric feature check and symmetry check; wherein, the comparison with design drawings includes comparing the geometric shape modeled in the three-dimensional model with the design drawings corresponding to the preset bridge, and the comparison includes checking whether the size, shape and position are consistent; The geometric feature check includes verifying whether there are redundant geometric elements in the shape features of the geometric shape in the three-dimensional model, and the geometric elements include edges, faces and integrity of the geometric shape; The symmetry check includes performing a symmetry check on a geometric shape having symmetry; The numerical simulation verification includes finite element analysis and modal analysis; The finite element analysis includes importing the three-dimensional model into simulation software for finite element analysis, and simulating the structural response of the geometric shape under actual load conditions, wherein the structural response includes displacement, stress and strain of the geometric shape; at the same time, a safety threshold is preset for the structural response, and the simulation result of the finite element analysis is compared with the safety threshold. If the structural response of the geometric shape under actual load conditions is lower than the safety threshold, the system determines that the structural response of the preset bridge is in a safe state; otherwise, no determination is made; And mark the load parameters under actual load conditions as reference load parameters; The modal analysis is used to perform modal analysis on the geometric shapes in the three-dimensional model, and the modal analysis includes calculating the natural frequencies and vibration modes of the geometric shapes, and presetting reference values ​​based on the natural frequencies and vibration modes; marking the calculated natural frequencies and vibration modes as theoretical values; when the theoretical values ​​are the same as the reference values, the system determines that the result of the modal analysis on the geometric shapes in the three-dimensional model is accurate; otherwise, the result is determined to be inaccurate.

3. A bridge large temporary structure parametric modeling system as claimed in claim 2, characterized in that: If the system does not determine that the structural response of the preset bridge is in a safe state, or the system determines that the result of the modal analysis of the geometric shape in the three-dimensional model is inaccurate, the geometric shape is divided into a side end geometric shape and a middle end geometric shape of the preset bridge in the three-dimensional model, and the side end geometric shape is the geometric shape of the left and right sides of the preset bridge. Among the geometric shapes on the left and right sides, the geometric shape on the left side is divided into , , ..., ,in, The first geometric shapes; the geometric shapes on the right are divided into , , ..., ,in, The first geometric shapes; A geometry whose value is higher than the safety threshold under the reference load parameter is obtained from different geometric shapes distinguished on the left and right sides, and the geometry is marked as a first risky geometry; and the associated influence of the change of the reference load parameter on the change of the structural response of the first risky geometry is analyzed.

4. A bridge large temporary structure parametric modeling system as claimed in claim 3, characterized in that: The analysis of the associated impact includes analyzing the changes in reference load parameters of the vertical displacement, lateral displacement and torsional displacement of the first risk geometry; wherein: The vertical displacement includes adjusting the reference load parameters of the first risk geometry on the bridge surface at the upper end of the first risk geometry, and the adjustment method is as follows: On the bridge deck, the first risk geometric shape is taken as a center point, and the center point is a center point when facing the preset bridge; Extending 5 to 6 meters to the left and right sides based on the center point on the bridge deck, adjusting the reference load parameters within the range extending to the left and right sides; The adjustment is to reduce the load parameter, including reducing the load parameter by 5% to 10% as an adjustment interval; calculating a change in the structural response of the first risky geometry in different adjustment intervals until the structural response of the first risky geometry is lower than the safety threshold; The load parameters corresponding to the structural response of the first risk geometry being lower than the safety threshold are uploaded to the database, and the load parameters are marked as ; The lateral displacement includes adjusting the reference load parameters of the first risk geometry on the bridge surface at the upper end of the first risk geometry, and the adjustment method is as follows: On the bridge deck, the first risk geometric shape is taken as a center point, and the center point is a center point when looking down at the preset bridge; Extending 2 to 4 meters upward and downward from the center point on the bridge deck, adjusting the reference load parameters within the range extending upward and downward; The adjustment is to reduce the load parameter, including reducing the load parameter by 5% to 10% as an adjustment interval; calculating a change in the structural response of the first risky geometry in different adjustment intervals until the structural response of the first risky geometry is lower than the safety threshold; The load parameters corresponding to the structural response of the first risk geometry being lower than the safety threshold are uploaded to the database, and the load parameters are marked as ; The torsional displacement includes adjusting the reference load parameters of the first risk geometry on the bridge surface at the upper end of the first risk geometry, and the adjustment method is as follows: On the bridge deck, the first risk geometric shape is taken as a center point, and the center point is a center point when looking down at the preset bridge; Extending outwards by 1 to 2 meters based on the center point on the bridge deck, and adjusting the reference load parameters within the extended range; The adjustment is to reduce the load parameter, including reducing the load parameter by 5% to 10% as an adjustment interval; calculating a change in the structural response of the first risky geometry in different adjustment intervals until the structural response of the first risky geometry is lower than the safety threshold; The load parameters corresponding to the structural response of the first risk geometry being lower than the safety threshold are uploaded to the database, and the load parameters are marked as .

5. A bridge large temporary structure parametric modeling system as claimed in claim 3, characterized in that: In the mid-end geometry, the mid-end geometry is divided into , , ..., ,in, The middle part of the bridge is shown in FIG. and obtaining a geometric shape higher than the safety threshold from the distinguished geometric shapes, marking the geometric shape as a second risk geometric shape; and analyzing in the second risk geometric shape the associated influence of a change in a reference load parameter on a change in a structural response of the second risk geometric shape.

6. A bridge large temporary structure parametric modeling system as claimed in claim 5, characterized in that: The method of analyzing the associated impact includes adjusting the reference load parameters of the second risk geometry at the bridge surface at the upper end of the second risk geometry, and the adjustment method includes taking the second risk geometry as the center point, and the center point is the center point when facing the preset bridge; In the second risk geometry, the reference load parameter is adjusted on the bridge deck at the upper ends of any two geometries, wherein the adjustment is to reduce the load parameter, including reducing the load parameter by 5% to 10% as an adjustment interval, and calculating the change of the structural response of the second risk geometry in different adjustment intervals until the structural response of the second risk geometry is lower than the safety threshold; The load parameters corresponding to the structural response of the first risk geometry being lower than the safety threshold are uploaded to the database, and the load parameters are marked as .

7. A bridge large temporary structure parametric modeling system as claimed in claim 6, characterized in that: The reference load parameters of the second risk geometry are adjusted at the bridge deck at the upper end of the second risk geometry, and the adjustment method also includes adjusting the reference load parameters between the bridge decks at the upper ends of any two geometries in the second risk geometry, and the adjustment is to reduce the load parameters, including reducing the load parameters by 8% to 13% as an adjustment interval, and calculating the change in the structural response of the second risk geometry in different adjustment intervals until the structural response of the second risk geometry is lower than the safety threshold.

8. A bridge large temporary structure parametric modeling system as claimed in claim 1, characterized in that: It also includes a model output module, which responds to the construction verification evaluation of the model verification module and is used to output the three-dimensional model of the preset bridge temporary structure that has passed the evaluation in a format including a three-dimensional model file, a two-dimensional drawing file and / or a design report file.

9. The method applied to the large temporary bridge structure parametric modeling system as claimed in claim 1, characterized in that: The following steps are involved: Acquire design parameters of a preset bridge structure, wherein the design parameters include structure size parameters, material property parameters, load parameters and construction process parameters, and construct a database based on the design parameters; Generate a three-dimensional model of the preset bridge structure based on the database; The method includes generating a geometric shape with respect to the structural dimension parameters; assigning corresponding model elements to the material attribute parameters in the three-dimensional model; applying corresponding loads on the three-dimensional model according to the load parameters; and simulating the construction process of the three-dimensional model according to the construction process parameters; The three-dimensional model is subjected to safety verification, wherein the safety verification includes geometric verification, mechanical verification and construction verification; wherein, The geometrical verification verifies the geometrical shape in the three-dimensional model; Mechanical verification performs mechanical analysis on the three-dimensional model, wherein the mechanical analysis includes calculating mechanical performance indicators of stress, strain and deformation of the structure of the preset bridge under various loads; Construction verification is based on the results of the mechanical verification and is used to simulate the construction results according to the mechanical performance indicators and evaluate the safety of the construction; According to the evaluation of the construction verification, the three-dimensional model of the preset bridge temporary structure that has passed the evaluation will be output in a format, and the output format includes a three-dimensional model file, a two-dimensional drawing file and / or a design report file.

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