A parametric modeling system and method for large temporary bridge structures

Abstract

The present invention discloses a parametric modeling system and method for large temporary bridge structures, belonging to the field of bridge engineering technology. The system includes a data acquisition module for acquiring design parameters of a preset large temporary bridge structure, the design parameters including structural dimension parameters, material property parameters, load parameters, and construction process parameters, and constructing a database based on the design parameters; a data fusion modeling module, the data fusion modeling module responding to the database and being used to generate a three-dimensional model of the preset large temporary bridge structure, the data fusion modeling module including a geometric modeling unit, a material property assignment unit, a load application unit, and a construction simulation unit; the geometric modeling unit responding to the structural dimension parameters and being used to generate the geometric shape of the large temporary bridge structure. The present invention can 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.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge engineering, in particular to a parametric modeling system and method for large temporary bridge structures. Background Art

[0002] In bridge construction, large temporary structures (such as temporary piers, buttresses, and supports) are crucial for ensuring smooth construction and safety. In real life, the design of large temporary bridge structures is complex, involving multiple temporary structures and components. Modeling can ensure the accuracy of design and construction to a certain extent.

[0003] Regarding this research, application number CN202411768032.6 provides a parametric modeling method for 3D angled steel anchor boxes of bridge towers. This technical solution includes establishing a knowledge engineering template for steel anchor box units; establishing a knowledge engineering template for input conditions for the steel anchor box units; inputting parameters for multiple sets of steel anchor box input conditions into the knowledge engineering template to obtain structural models for the multiple sets of steel anchor boxes; and performing angle correction on the structural models of the steel anchor boxes. This technical solution enables 3D modeling of bridge tower steel anchor boxes, representing their complex structures while reducing errors. It also allows for adjustment of component parameters for model modification and optimization.

[0004] Another application, CN202211019200.2, provides a parametric 3D modeling method for spatial M-shaped node reinforcement based on the 3Dexperience platform. This technical solution involves creating a parametric 3D model template for the curved beams and cylinders in the M-shaped node area; establishing a node skeleton line model based on the starting point coordinates of the cylinders and curved beams; calling the template to generate the LOD200 3D model of the M-shaped node; and upgrading the LOD200 model and adjusting the cylinder and curved beam reinforcement and end connection parameters to obtain the LOD300 3D model of the M-shaped node. This technical solution improves the speed and accuracy of spatial M-shaped node reinforcement modeling. It also enables the use of reinforcement positioning plates to avoid rework and delays caused by rebar position deviations, facilitates the understanding of complex node designs, and improves on-site construction efficiency.

[0005] However, existing technologies suffer from low accuracy in modeling the geometric details and construction phases of large temporary structures. For example, it is difficult to accurately simulate the stress state and deformation of temporary structures at different construction stages. This makes it impossible to verify the modeling of large temporary structures, hindering 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 objects of the present invention is to provide a parametric modeling system and method for large temporary bridge structures, which performs multi-dimensional verification on the generated three-dimensional model, calculates the mechanical performance indicators such as stress, strain and deformation of the structure under various loads, and ensures the safety and reliability of the structure.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0009] In one aspect, the present invention provides a parametric modeling system for large bridge structures, comprising:

[0010] A data acquisition module is used to obtain 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;

[0011] A data fusion modeling module, the data fusion modeling module responding to the database and used to generate a three-dimensional model of the preset bridge structure, the data fusion modeling module including a geometric modeling unit, a material property assignment unit, a load application unit and a construction simulation unit;

[0012] The geometric modeling unit is responsive to the structural size parameters and is used to generate the geometric shape of the bridge structure;

[0013] 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;

[0014] The load applying unit is responsive to the load parameter and is used to apply a corresponding load on the three-dimensional model;

[0015] The construction simulation unit is responsive to the construction process parameters and is used to simulate the construction process of the three-dimensional model;

[0016] A model verification module, the model verification module is used to perform safety verification on the three-dimensional model, the safety verification including geometric verification, mechanical verification and construction verification;

[0017] The geometric verification is used to verify the geometric shape in the three-dimensional model;

[0018] The mechanical verification is used to perform 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;

[0019] The construction verification responds to the results of the mechanical verification and is used to simulate construction results according to mechanical performance indicators and evaluate the safety of the construction.

[0020] As a preferred solution of the present invention, wherein: in the geometric verification, the geometric shape in the three-dimensional model is verified, and the verification method includes geometric consistency checking and / or numerical simulation verification;

[0021] The geometric consistency check includes comparison with the design drawings, geometric feature checking, and symmetry checking; wherein 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 size, shape, and position are consistent;

[0022] 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;

[0023] The symmetry check includes performing a symmetry check on a geometric shape having symmetry;

[0024] The numerical simulation verification includes finite element analysis and modal analysis;

[0025] 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; simultaneously, 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 the 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;

[0026] And mark the load parameters under actual load conditions as reference load parameters;

[0027] 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 frequency and mode shape of the geometric shape, and presetting reference values based on the natural frequency and mode shape; marking the calculated natural frequency and mode shape as theoretical values; when the theoretical value is the same as the reference value, the system determines that the result of the modal analysis of the geometric shape in the three-dimensional model is accurate; otherwise, the result is determined to be inaccurate.

[0028] As a preferred solution of the present invention, 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 the geometric shape is divided into the side end geometric shape and the 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, Indicates the first geometric shapes;

[0029] A geometry whose load 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 risk geometry; and the correlation effect of the change of the reference load parameter on the change of the structural response of the first risk geometry is analyzed.

[0030] As a preferred solution of the present invention, the analysis of the associated impact includes analyzing the changes in the reference load parameters of the vertical displacement, lateral displacement and torsional displacement of the first risk geometry; wherein:

[0031] 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:

[0032] On the bridge deck, the first risk geometric shape is used as a center point, where the center point is the center point when facing the preset bridge;

[0033] On the bridge deck, extending 5 to 6 meters to the left and right sides based on the center point, adjusting the reference load parameters within the range extending to the left and right sides;

[0034] The adjustment is to reduce the load parameter, including reducing the load parameter by 5% to 10% as an adjustment interval;

[0035] 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;

[0036] 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 marked as ;

[0037] 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:

[0038] On the bridge deck, the first risk geometric shape is used as a center point, where the center point is a center point when looking down at the preset bridge;

[0039] On the bridge deck, extending 2 to 4 meters upward and downward from the center point, adjusting the reference load parameters within the range extending upward and downward;

[0040] The adjustment is to reduce the load parameter, including reducing the load parameter by 5% to 10% as an adjustment interval;

[0041] 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;

[0042] 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 marked as ;

[0043] 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:

[0044] On the bridge deck, the first risk geometric shape is used as a center point, where the center point is a center point when looking down at the preset bridge;

[0045] Extending outwards from the center point on the bridge deck by 1 to 2 meters, and adjusting the reference load parameters within the extended range;

[0046] The adjustment is to reduce the load parameter, including reducing the load parameter by 5% to 10% as an adjustment interval;

[0047] 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;

[0048] 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 marked as .

[0049] As a preferred solution of the present invention, wherein: in the middle end geometric shape, the middle end geometric shape is divided into , ,..., ,in, The middle part of the bridge is shown as and obtaining a geometric shape above the safety threshold from the differentiated 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.

[0050] As a preferred solution of the present invention, the method of analyzing the associated impact includes adjusting a reference load parameter of the second risk geometry at a bridge surface at an upper end of the second risk geometry, wherein the adjustment method includes taking the second risk geometry as a center point, the center point being a center point when facing the preset bridge;

[0051] In the second risk geometry, the reference load parameter is adjusted on the bridge deck at the upper ends of any two geometric shapes, 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 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;

[0052] 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 marked as .

[0053] As a preferred solution of the present invention, 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 geometric shapes 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 changes 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.

[0054] As a preferred solution of the present invention, 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, and the output format includes a three-dimensional model file, a two-dimensional drawing file and / or a design report file.

[0055] In another aspect, the present invention provides a method for applying the above-mentioned large-scale bridge structure parametric modeling system, comprising the following steps:

[0056] Obtaining design parameters of a preset bridge temporary structure, the design parameters including structural size parameters, material property parameters, load parameters, and construction process parameters, and building a database based on the design parameters;

[0057] Generating a three-dimensional model of the preset bridge structure based on the database; generating a geometric shape with respect to the structural dimension parameters; assigning corresponding model elements to the material property parameters in the three-dimensional model; applying corresponding loads to 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;

[0058] The three-dimensional model is subjected to safety verification, which includes geometric verification, mechanical verification and construction verification; wherein,

[0059] Geometric verification verifies the geometric shape in the three-dimensional model;

[0060] 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;

[0061] Construction verification is based on the results of the mechanical verification and is used to simulate construction results according to mechanical performance indicators and evaluate the safety of construction;

[0062] Based on the construction verification assessment, the 3D model of the preset bridge temporary structure that has passed the assessment will be output in a format including 3D model files, 2D drawing files and / or design report files. Beneficial effects

[0063] The present invention not only improves modeling efficiency but also performs multi-dimensional verification of 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 uses finite element analysis and other means to calculate the mechanical performance indicators such as stress, strain, and deformation of the structure under various loads to ensure the safety and reliability of the structure; construction verification simulates the construction process to evaluate the safety and feasibility of the construction;

[0064] 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 considered to be safe. This helps to timely identify potential safety hazards and ensure the accuracy of the design.

[0065] During the model verification phase, load parameters can be flexibly adjusted and changes in structural response can be observed in real time, allowing staff to quickly adjust modeling parameters and optimize design solutions based on different working conditions and requirements.

[0066] The system can identify geometric shapes that are above the safety threshold and mark them as risky geometries. By adjusting the load parameters of these risky geometries, the system can find the optimal load parameters that make the structural response below the safety threshold, thereby optimizing the load distribution during construction and reducing construction risks.

[0067] The system calculates the natural frequency and vibration mode of the geometric shape through modal analysis and compares the theoretical values with reference values, which provides staff with more comprehensive structural performance information and facilitates scientific decision-making. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0069] Figure 1 Schematic diagram of the modular structure of a parametric modeling system for a large temporary bridge structure according to an embodiment of the present invention;

[0070] Figure 2 Schematic diagram of a method flow in an embodiment of the present invention;

[0071] Numbers in the figure: 110 - data acquisition module; 120 - data fusion 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 DESCRIPTION

[0072] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0073] Since existing technologies have low simulation accuracy for the geometric details and construction stages of large temporary structures during modeling, it is difficult to accurately simulate the stress state and deformation of temporary structures at different construction stages. As a result, verification cannot be performed during the modeling process of large temporary structures, which is not conducive to improving modeling efficiency and quality.

[0074] Based on this, the present invention proposes a parametric modeling system and method for large temporary bridge structures, which performs multi-dimensional verification on the generated three-dimensional model, calculates the mechanical performance indicators such as stress, strain and deformation of the structure under various loads, and ensures the safety and reliability of the structure.

[0075] The present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0076] Reference Figures 1 to 2 , is an embodiment of the present invention, which provides a parametric modeling system for large bridge structures, including:

[0077] The data acquisition module 110 is used to obtain the design parameters of the preset bridge structure, including structural size parameters, material property parameters, load parameters and construction process parameters, and to build a database based on the design parameters;

[0078] In this embodiment, the structural dimension parameters include pier height, pier diameter, pier spacing, etc.

[0079] Material property parameters include concrete strength grade, steel yield strength, etc.

[0080] Load parameters include construction load, wind load, earthquake load, etc.

[0081] Construction process parameters include construction sequence, construction stages, etc.

[0082] The data fusion modeling module 120 responds to the database and is used to generate a three-dimensional model of a preset 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.

[0083] The geometric modeling unit 1201 is responsive to the structural dimension parameters and is used to generate the geometric shape of the bridge structure;

[0084] In this embodiment, for example, for a temporary pier, a three-dimensional model of the pier body can be generated based on parameters such as the pier body height and pier body diameter; for a temporary support, a geometric model of the support can be generated based on parameters such as the support shape, size, and spacing;

[0085] 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;

[0086] In this embodiment, the concrete pier is given the properties of the concrete material such as density and elastic modulus; the steel structure support is given the properties of the steel material such as yield strength and elastic modulus;

[0087] The load applying unit 1203 responds to the load parameters and is used to apply the corresponding load on the three-dimensional model;

[0088] In this embodiment, construction loads are applied to the model during the construction phase, and wind loads and earthquake loads are applied to the overall model;

[0089] The construction simulation unit 1204 responds to the construction process parameters and is used to simulate the construction process of the three-dimensional model;

[0090] In this embodiment, the construction sequence of the scaffolding and the pouring process of the temporary pier are simulated to ensure the feasibility and safety of the construction process;

[0091] Model verification module 130, the model verification module is used to perform safety verification on the three-dimensional model, and the safety verification includes geometric verification, mechanical verification and construction verification;

[0092] Geometric verification is used to verify the geometric shape of the 3D model;

[0093] In this embodiment, the verification includes checking whether the geometric shape of the 3D model complies with the design specifications and whether there are any geometric conflicts or unreasonableness. For example, it checks whether the spacing of temporary piers meets the construction requirements and whether the shape of the temporary support matches the bridge structure.

[0094] Mechanical verification is used to perform mechanical analysis on the 3D model. The mechanical analysis includes calculating the mechanical performance indicators of the stress, strain and deformation of the pre-set bridge structure under various loads.

[0095] In this embodiment, the strength, stiffness, and stability requirements of the structure are determined based on the material properties and design specifications. For example, a finite element analysis method is used to perform a mechanical analysis on the temporary piers to ensure that they will not be damaged or deformed excessively under construction loads and wind loads. The structure of the pre-set bridge includes piers, buttresses, supports, etc.

[0096] The results of the mechanical verification of the construction response are used to simulate the construction results based on the mechanical performance indicators and to evaluate the safety of the construction;

[0097] In this embodiment, for example, it is checked whether the construction sequence is reasonable, whether the structural stability during the construction stage meets the requirements, etc.

[0098] In geometric verification, the geometric shape of the 3D model is verified by geometric consistency checking and / or numerical simulation verification.

[0099] In this embodiment, for example, it is checked whether the span, pier height, beam cross-sectional dimensions, etc. of the bridge completely match the design drawings;

[0100] The geometric consistency check includes comparison with the design drawings, geometric feature checking, and symmetry checking. The comparison with the design drawings involves comparing the geometric shapes modeled in the 3D model with the design drawings corresponding to the pre-set bridge, checking for consistency in size, shape, and position.

[0101] Geometric feature checking 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.

[0102] Symmetry checking includes symmetry checking of geometric shapes with symmetry;

[0103] Numerical simulation verification includes finite element analysis and modal analysis;

[0104] Finite element analysis involves importing a 3D model into simulation software for finite element analysis, simulating the structural response of the geometric shape under actual load conditions. The structural response includes displacement, stress, and strain of the geometric shape. A safety threshold is preset for the structural response, and the simulation results of the finite element analysis are 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.

[0105] And mark the load parameters under actual load conditions as reference load parameters;

[0106] Modal analysis is used to perform modal analysis on geometric shapes in a 3D model. Modal analysis involves calculating the natural frequencies and mode shapes of the geometric shapes, setting reference values based on the natural frequencies and mode shapes, and marking the calculated natural frequencies and mode shapes as theoretical values. When the theoretical values are the same as the reference values, the system determines that the modal analysis results for the geometric shapes in the 3D model are accurate; otherwise, the results are determined to be inaccurate.

[0107] In this embodiment, the simulation software includes ANSYS, Midas Civil, etc.

[0108] Finite element analysis (FEA) is a numerical analysis technique that uses mathematical approximations to simulate real physical systems. By discretizing a continuum into a number of finite-sized units, it simulates and solves real physical problems. Applied to bridge modeling, FEA can be used for structural strength analysis, modal analysis, fatigue and fracture mechanics analysis, etc.

[0109] The accuracy of the geometric shape is ensured through comparison with the design drawings, geometric feature inspection and symmetry inspection;

[0110] The scientific methods such as finite element analysis and modal analysis are used to quantitatively evaluate the structural response, which improves the scientific nature of the verification;

[0111] By presetting safety thresholds, the structural response is evaluated to ensure the safety of the structure;

[0112] Furthermore, in this embodiment, 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 the side end geometric shape and the middle end geometric shape of the preset bridge in the three-dimensional model. The side end geometric shape is the geometric shape of the left and right sides of the preset bridge. Among the geometric shapes of the left and right sides, the geometric shape on the left side is divided into , ,..., ,in, Indicates the first geometric shape distinguished on the left side of the preset bridge; distinguish the geometric shape on the right side as , ,..., ,in, Indicates the right side of the preset bridge. geometric shapes;

[0113] Obtaining a geometry whose load is higher than a safety threshold under a reference load parameter from among the different geometric shapes distinguished on the left and right sides, marking the geometry as a first risk geometry; and analyzing the correlation effect of a change in the reference load parameter on a change in a structural response of the first risk geometry;

[0114] Specifically, in this embodiment, the analysis of the correlation impact includes analyzing the changes in the reference load parameters of the vertical displacement, lateral displacement, and torsional displacement of the first risk geometry; wherein:

[0115] The vertical displacement includes the adjustment of the reference load parameters of the first risk geometry at the bridge surface at the upper end of the first risk geometry. The adjustment method is as follows:

[0116] On the bridge deck, the first risk geometry is taken as the center point, and the center point is the center point when looking straight ahead at the preset bridge;

[0117] On the bridge deck, the reference load parameters are adjusted within the range extending 5 to 6 meters to the left and right sides based on the center point;

[0118] Adjustment is to reduce the load parameters, including reducing the load parameters by 5% to 10% as an adjustment interval;

[0119] calculating a change in a structural response of the first risky geometry in different adjustment intervals until the structural response of the first risky geometry is lower than a safety threshold;

[0120] The load parameters corresponding to the structural response of the first risk geometry below the safety threshold are uploaded to the database and marked as ;

[0121] The lateral displacement includes the adjustment of the reference load parameters of the first risk geometry at the bridge surface at the upper end of the first risk geometry. The adjustment is as follows:

[0122] On the bridge deck, the first risk geometry is taken as the center point, where the center point is the center point when looking down at the preset bridge;

[0123] On the bridge deck, the reference load parameters are adjusted within the range extending 2 to 4 meters upward and downward from the center point;

[0124] Adjustment is to reduce the load parameters, including reducing the load parameters by 5% to 10% as an adjustment interval;

[0125] calculating a change in a structural response of the first risky geometry in different adjustment intervals until the structural response of the first risky geometry is lower than a safety threshold;

[0126] The load parameters corresponding to the structural response of the first risk geometry below the safety threshold are uploaded to the database and marked as ;

[0127] The torsional displacement includes the adjustment of the reference load parameters of the first risk geometry at the bridge surface at the upper end of the first risk geometry. The adjustment is as follows:

[0128] On the bridge deck, the first risk geometry is taken as the center point, where the center point is the center point when looking down at the preset bridge;

[0129] Extend 1 to 2 meters outward from the center point on the bridge deck and adjust the reference load parameters within the extended range;

[0130] Adjustment is to reduce the load parameters, including reducing the load parameters by 5% to 10% as an adjustment interval;

[0131] calculating a change in a structural response of the first risky geometry in different adjustment intervals until the structural response of the first risky geometry is lower than a safety threshold;

[0132] The load parameters corresponding to the structural response of the first risk geometry below the safety threshold are uploaded to the database and marked as ;

[0133] In this embodiment, looking straight ahead at the preset bridge is equivalent to looking straight ahead at the bridge deck; looking down at the preset bridge is equivalent to looking down at the bridge deck;

[0134] When vertical displacement, including static load (such as vehicle load), increases, the vertical displacement of the bridge will usually increase. For example, in a simply supported beam bridge, the vertical deflection at the midpoint of the beam will increase significantly with the increase of vehicle load.

[0135] Lateral displacement: Increases in wind loads or lateral vehicle loads will lead to increased lateral displacement of the bridge, especially for long-span bridges, where lateral displacement is more sensitive to wind loads;

[0136] 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;

[0137] Therefore, this embodiment analyzes the associated effects of changes in reference load parameters on the structural response of the first risk geometry based on vertical displacement, lateral displacement, and torsional displacement, which has practical significance;

[0138] It should be noted that in this embodiment, the mid-end geometric shape is divided into , ,..., ,in, Indicates the middle section of the preset bridge and obtaining a geometric shape having a load higher than a safety threshold from the differentiated geometric shapes, marking the geometric shape as a second risk geometric shape; analyzing, in the second risk geometric shape, the correlation effect of a change in a reference load parameter on a change in a structural response of the second risk geometric shape;

[0139] In this embodiment, the method of analyzing the correlation impact includes adjusting the reference load parameters of the second risk geometry at the bridge surface above the second risk geometry, and the adjustment method includes taking the second risk geometry as the center point, the center point being the center point when facing the preset bridge;

[0140] In the second risk geometry, the reference load parameters of the bridge deck at the upper ends of any two geometries are adjusted to reduce the load parameters, including reducing the load parameters by 5% to 10% in each 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;

[0141] The load parameters corresponding to the structural response of the first risk geometry below the safety threshold are uploaded to the database and marked as ;

[0142] It should be emphasized that in this embodiment, the reference load parameter of the second risk geometry is adjusted at the upper bridge deck of the second risk geometry. The adjustment method also includes adjusting the reference load parameter between the upper bridge decks of any two geometric shapes in the second risk geometry to reduce the load parameter, including reducing the load parameter 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.

[0143] In this embodiment, since the reference load parameters are adjusted between the bridge decks at the upper ends of any two geometric shapes, it is necessary to increase the intensity of the load parameter reduction, thereby being able to perform calculations and analysis on the changes in the structural response of the second risk geometry at different points;

[0144] Furthermore, this embodiment further includes a model output module 140. The model output module is responsive to the construction verification evaluation of the model verification module and is configured 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.

[0145] In this embodiment, the format output is performed and can be used for subsequent design, construction and analysis;

[0146] 3D model files include BIM model files;

[0147] 2D drawing files include construction drawings;

[0148] The design report file includes the mechanical analysis report.

[0149] Based on the above, this application can perform multi-dimensional verification of 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 the mechanical performance indicators such as stress, strain and deformation of the structure under various loads through finite element analysis and other means to ensure the safety and reliability of the structure; construction verification simulates the construction process to evaluate the safety and feasibility of the construction.

[0150] This embodiment combines the above-mentioned bridge large temporary structure parametric modeling system and also proposes a working method of the system as follows:

[0151] Step S10: obtaining design parameters of a preset bridge temporary structure, the design parameters including structural size parameters, material property parameters, load parameters and construction process parameters, and constructing a database based on the design parameters;

[0152] Step S20: Generate a three-dimensional model of a preset bridge structure based on the database; this includes generating a geometric shape based on structural dimension parameters; assigning corresponding model elements to material property parameters in the three-dimensional model; applying corresponding loads to the three-dimensional model based on load parameters; and simulating the construction process of the three-dimensional model based on construction process parameters.

[0153] Step S30: Perform safety verification on the 3D model, which includes geometric verification, mechanical verification and construction verification;

[0154] Geometric verification verifies the geometric shape in the 3D model;

[0155] Mechanical verification is to conduct mechanical analysis on the 3D model. The mechanical analysis includes calculating the mechanical performance indicators of the stress, strain and deformation of the pre-set bridge structure under various loads;

[0156] Construction verification is based on the results of mechanical verification and is used to simulate construction results according to mechanical performance indicators and evaluate the safety of construction;

[0157] Step S40: Based on the evaluation of the construction verification, the three-dimensional model of the preset bridge temporary structure that has passed the evaluation is output in a format including a three-dimensional model file, a two-dimensional drawing file and / or a design report file.

[0158] In summary, this application can perform multi-dimensional verification of 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 the 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 to evaluate the safety and feasibility of the construction.

[0159] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A parametric modeling system for large bridge structures, characterized by: include: A data acquisition module is used to obtain 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, the data fusion modeling module responding to the database and used to generate a three-dimensional model of the preset bridge structure, the data fusion modeling module including 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 size parameters and is used to generate the geometric shape of the bridge structure; 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 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 including geometric verification, mechanical verification and construction verification; The geometric verification is used to verify the geometric shape of the three-dimensional model; the verification method includes geometric consistency checking and numerical simulation verification, and 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; simultaneously, 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 the 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 judgment is made; And mark the load parameters under actual load conditions as reference load parameters; 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 the side end geometric shape and the middle end geometric shape of the preset bridge in the three-dimensional model. The side end geometric shape is the geometric shape of the left and right sides of the preset bridge. Among the geometric shapes of 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, Indicates the first geometric shapes; Acquire a geometric shape whose load exceeds the safety threshold under the reference load parameter from different geometric shapes distinguished on the left and right sides, and mark the geometric shape as a first risky geometric shape; and analyze the correlation effect of the change of the reference load parameter on the change of the structural response of the first risky geometric shape; The mechanical verification is used to perform 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; The construction verification responds to the results of the mechanical verification and is used to simulate construction results according to mechanical performance indicators and evaluate the safety of the construction.

2. A bridge structure parametric modeling system according to claim 1, characterized in that: In the geometric verification, the geometric consistency check includes comparison with the design drawings, geometric feature check, and symmetry check; wherein the comparison with the design drawings includes comparing the geometric shape modeled in the 3D 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 modal analysis is used to perform modal analysis on the geometric shape in the three-dimensional model. The modal analysis includes calculating the natural frequency and mode shape of the geometric shape, and presetting reference values based on the natural frequency and mode shape; marking the calculated natural frequency and mode shape as theoretical values; when the theoretical value is the same as the reference value, the system determines that the result of the modal analysis of the geometric shape in the three-dimensional model is accurate; otherwise, the result is determined to be inaccurate.

3. A bridge structure parametric modeling system according to claim 1, characterized in that: The analysis of the associated impact includes analyzing the changes in reference load parameters of 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 used as a center point, where the center point is the center point when facing the preset bridge; On the bridge deck, extending 5 to 6 meters to the left and right sides based on the center point, 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 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 used as a center point, where the center point is a center point when looking down at the preset bridge; On the bridge deck, extending 2 to 4 meters upward and downward from the center point, 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 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 used as a center point, where the center point is a center point when looking down at the preset bridge; Extending outwards from the center point on the bridge deck by 1 to 2 meters, 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 marked as .

4. A parametric modeling system for large temporary bridge structures according to claim 1, characterized in that: In the mid-end geometry, the mid-end geometry is divided into , ,..., ,in, The middle part of the bridge is shown as and obtaining a geometric shape above the safety threshold from the differentiated 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.

5. A bridge structure parametric modeling system as claimed in claim 4, characterized in that: The method of analyzing the correlation impact includes adjusting a reference load parameter of the second risk geometry at a bridge surface above the second risk geometry, wherein the adjustment method includes taking the second risk geometry as a center point, the center point being a 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 geometric shapes, 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 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; 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 marked as .

6. A bridge large temporary structure parametric modeling system according to claim 5, 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. 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. The adjustment is to reduce the load parameters, including reducing the load parameters by 8% to 13% each time 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.

7. A bridge structure parametric modeling system according to 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.

8. The method applied to the parametric modeling system for large temporary bridge structures as claimed in claim 1 is characterized in that: The following steps are involved: Obtaining design parameters of a preset bridge temporary structure, the design parameters including structural size parameters, material property parameters, load parameters, and construction process parameters, and building 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 property parameters in the three-dimensional model; applying corresponding loads to 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, which includes geometric verification, mechanical verification and construction verification; wherein, Geometric verification verifies the geometric 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 construction results according to mechanical performance indicators and evaluate the safety of construction; Based on the construction verification assessment, the 3D model of the preset bridge temporary structure that has passed the assessment will be output in a format including 3D model files, 2D drawing files and / or design report files.

Images