A method and system for creating a narrow steel box composite beam formwork based on CATIA

Abstract

The present application relates to the technical field of narrow steel box composite beam template creation, and discloses a narrow steel box composite beam template creation method and system based on CATIA, the creation method comprising the following steps: S1: creating a first parameter set and creating a road design line; S2: creating a main beam parameter set; S3: creating a main beam first section line frame diagram and a main beam first section 3D contour, and assigning corresponding design parameters in the main beam parameter set; S4: creating a main beam second section line frame diagram and a main beam second section 3D contour, and assigning corresponding design parameters in the main beam parameter set; S5: creating a main beam geometric body parameterization template; S6: creating a main beam design table; S7: repeating S2-S6 to create a narrow steel box composite beam template; S8: creating a resource table; and S9: cyclically calling the resource table, adjusting the design parameter properties, and automatically generating a narrow steel box composite beam geometric body of a corresponding specification. The present application can take components as objects, generate corresponding geometric body parameterization templates, and reduce operation steps.

Description

Technical Field

[0001] This invention relates to the field of narrow-width steel box girder formwork creation technology, specifically to a method and system for creating narrow-width steel box girder formwork based on CATIA. Background Technology

[0002] Traditional narrow-span steel box girder design lacks professional auxiliary tools, resulting in low levels of information-based and parametric design. Engineering designers need to spend a lot of time on manual modeling and detailed design of complex nodes, which not only makes division of labor and collaboration difficult, but also leads to a large workload for scheme changes and optimization difficulties, hindering the rapid application of the design model in subsequent projects.

[0003] Specifically, there are currently three main methods for creating narrow-span steel box girder structures in China: First, Tekla is used to create narrow-span steel box girder structures, but its parametric capabilities are relatively weak, making it difficult to reuse the designed composite girder structures. Second, Revit is used to create narrow-span steel box girder structures. Revit requires a lot of time and effort to create accurate models when dealing with such complex structures, manually modeling them to meet the requirements of construction drawings. For example, the creation of detailed components such as stiffening ribs and shear studs inside the steel box requires generating and setting parameters individually, which is quite cumbersome. Third, traditional road and bridge design software such as Bentley is used. This also presents difficulties in handling the complex details of composite girder structures, such as difficulty in locating details, complex and unclear spatial relationships and constraints of the structural model, and the inability to quickly change the design structural model after changes in design parameters, making subsequent model modifications difficult and resulting in low model reuse rate. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, one of the objectives of this invention is to provide a method for creating narrow-width steel box girder templates based on CATIA. This method generates corresponding geometric parametric templates based on the components, eliminating the need for individual generation, reducing operational steps, and enabling the rapid generation of narrow-width steel box girder templates of the corresponding specifications according to specific needs. These templates can be reused in different projects without the need for manual modification of design drawings and rework, thereby improving the design efficiency and quality of narrow-width steel box girder structures.

[0005] The technical solution adopted in this invention is as follows: A method for creating narrow-width steel box girder templates based on CATIA, comprising the following steps:

[0006] S1: Create the first parameter set, create the road design line, and define the starting point and ending point of the structural design positioning point through the road design line;

[0007] S2: Create the main beam parameter set;

[0008] S3: Create the first reference axis system with the starting structural design positioning point as the origin, and create the first section wireframe diagram of the main beam and the 3D outline of the first section of the main beam. Assign the corresponding design parameters from the main beam parameter set to each outline in the first section wireframe diagram of the main beam.

[0009] S4: Create a second reference axis system with the final structural design positioning point as the origin, and create the main beam second section wireframe diagram and the main beam second section 3D outline. Assign the corresponding design parameters from the main beam parameter set to each outline in the main beam second section wireframe diagram.

[0010] S5: The 3D outline of the first section of the main beam starts from the starting point of the structural design positioning point, and the 3D outline of the second section of the main beam starts from the ending point of the structural design positioning point. Both extend and connect along the road design line to create the parametric template of the main beam geometry.

[0011] S6: Extract key design parameters from the main beam parameter set and create a main beam design table;

[0012] S7: Repeat S2-S6 to create parametric templates and design tables for the crossbeam, steel base plate, and bridge deck geometry, and use them as templates for narrow steel box girder composite beams;

[0013] S8: Create a resource table for searching, calling and managing parametric templates of main beams, crossbeams, steel bottom plates, bridge deck geometry and design tables of corresponding structures in narrow steel box girder composite beams;

[0014] S9: Iterate through the parametric templates and design tables of the main beam, crossbeam, steel base plate, and bridge deck geometry of the narrow-width steel box girder in the resource table, adjust the design parameter attributes, and automatically generate the geometry of the narrow-width steel box girder of the corresponding specifications.

[0015] In a preferred embodiment of the present invention, S1 further includes the following steps:

[0016] S11: Define the first parameter set in the parameter set setting interface. The first parameter set includes the starting station location point, the ending station location point, the starting structural design location point, and the design parameters of the ending structural design location point.

[0017] S12: Create a new sketch based on the absolute axis XY plane, set the planar curve of the road design line and define the route starting point to form a horizontal line, then set the longitudinal slope and vertical curve of the road design line longitudinal section to form a longitudinal line, and automatically fit it into a 3D road design line through the 3D line module.

[0018] S13: Using the road design line projection as the baseline, define the starting and ending station locations of the narrow steel box girder segment on the road design line projection. Use the starting station location as the initial point, assign values ​​to the X and Y coordinates of the ending station location, set the X coordinate of the ending station location as the segment length, set the Y coordinate of the ending station location as the starting station location, and assign corresponding design parameters to the starting and ending station locations respectively.

[0019] S14: Project the starting station and ending station locations as the projection objects onto the road design line along the Z-axis of the absolute axis system, forming the starting structural design location and the ending structural design location.

[0020] In a preferred embodiment of the present invention, in S13, the road design line is projected along the Z-axis of the absolute axis system onto the XY plane of the absolute axis system to form a road design line projection.

[0021] In a preferred embodiment of the present invention, S2 further includes the following steps:

[0022] S21: Define the main beam parameter set in the parameter set setting interface. The main beam parameter set includes beam segment length, top plate width, top plate thickness, bottom plate width, bottom plate thickness, web height, web thickness, net web spacing, top plate stiffener height, top plate stiffener thickness, bottom plate stiffener height, bottom plate stiffener thickness, and top plate spacing.

[0023] In a preferred embodiment of the present invention, S3 further includes the following steps:

[0024] S31: Create a first reference axis system with the starting structural design positioning point as the origin, and use the YZ plane of the first reference axis system as the first sketch support surface;

[0025] S32: Create the first section wireframe of the main beam based on the first sketch support surface. The first section wireframe of the main beam includes the sketch outlines of the top plate, bottom plate, web plate, top plate stiffener, and bottom plate stiffener. Create the sketch outlines of the top plate, bottom plate, web plate, top plate stiffener, and bottom plate stiffener, and set geometric constraints and dimensional constraints for the sketch outlines of the top plate, bottom plate, web plate, top plate stiffener, and bottom plate stiffener, and assign the corresponding design parameters to the parameter set of the main beam.

[0026] S33: Create a 3D outline of the first section of the main beam from the wireframe diagram of the main beam, and obtain the 3D outline of the first section of the narrow steel box composite beam main beam at the starting structural design positioning point.

[0027] In a preferred embodiment of the present invention, S4 further includes the following steps:

[0028] S41: Create a second reference axis system with the endpoint structural design positioning point as the origin, and use the YZ plane of the second reference axis system as the second sketch support surface;

[0029] S42: Create the second section wireframe diagram of the main beam based on the second sketch support surface. The second section wireframe diagram of the main beam includes the sketch outlines of the top plate, bottom plate, web plate, top plate stiffener, and bottom plate stiffener. Create the sketch outlines of the top plate, bottom plate, web plate, top plate stiffener, and bottom plate stiffener, and set geometric constraints and dimensional constraints for the sketch outlines of the top plate, bottom plate, web plate, top plate stiffener, and bottom plate stiffener, and assign the corresponding design parameters to the parameter set of the main beam.

[0030] S43: Create a 3D profile using the wireframe diagram of the second section of the main beam to obtain the 3D profile of the second section of the narrow steel box composite beam at the final structural design positioning point.

[0031] In a preferred embodiment of the present invention, S6 further includes the following steps:

[0032] S61: Classify the main beam parameter set design parameters according to their primary and secondary importance, and summarize the key design parameters of the main beam parameter set to create a main beam design table.

[0033] The second objective of this invention is to provide a CATIA-based narrow-width steel box girder template creation system. This system employs the CATIA-based narrow-width steel box girder template creation method described above, and further includes a contour creation module, a parameter setting module, and a generation module. The contour creation module is used to create a parametric template of the narrow-width steel box girder geometry. The parameter setting module is used to assign contour design parameters to the narrow-width steel box girder geometry. The generation module is used to iteratively call the parametric template of the narrow-width steel box girder geometry, adjust the corresponding design parameter attributes, and automatically generate narrow-width steel box girder geometry of the corresponding specifications.

[0034] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0035] This invention creatively proposes to generate narrow steel box girder composite beams as specific components, such as the main beam as a whole, by generating the main beam as a whole through the cross-sectional line diagram and road design line, instead of generating specific parts under the components one by one. For example, the main beam top plate, main beam bottom plate, etc. are generated separately first and then assembled, reducing operation steps and improving generation efficiency.

[0036] In this invention, the projection of the three-dimensional road design line onto the two-dimensional plane is first determined, and then the starting point and ending point of the three-dimensional road design line are accurately determined by the two-dimensional projection. The component cross-sections generated based on the two-dimensional plane are located at both ends of the three-dimensional road design line, thereby directly generating a three-dimensional geometry that simulates an actual bridge. This allows the components to be generated as a whole, reducing the number of operation steps. The component cross-sections generated by the two-dimensional plane can be refined for details, improving accuracy. Thus, it is possible to generate the whole quickly while ensuring accuracy.

[0037] This invention addresses the issue of relationships between lines in a two-dimensional planar structural drawing being mutually constrained by design parameters. (When assigning design parameters to dimensions in a two-dimensional planar structural drawing, formulas are edited using these parameters, such as: Top plate protrusion length = (Top plate length - Net web spacing - Web thickness * 2) / 2, where the parameters within the parentheses are design parameters from the parameter set). To generate a three-dimensional geometry of the corresponding size, only the specific contour design parameters in the two-dimensional planar structural drawing need to be adjusted. This allows for adjustments to the corresponding design parameters based on specific requirements. In other words, by adjusting the design parameters in the parameter set, changes in geometric and formula relationships are further driven. Thus, adjusting the design parameters can drive adjustments to the overall design model (the entire cross-sectional wireframe) to generate a three-dimensional geometry of the corresponding size, which can be reused in different projects.

[0038] The operation is simple, the workload of scheme changes is small, there is no need to manually modify drawings and rework, which improves the efficiency of creating narrow steel box composite beams, enhances the versatility of narrow steel box composite beam structural forms, reduces the high error rate caused by manual drawing modification, and improves the design quality of narrow steel box composite beam structural models. Attached Figure Description

[0039] Figure 1 This is a flowchart of the method for creating narrow steel box girder templates based on CATIA in this invention;

[0040] Figure 2 This is a schematic diagram of the first cross-section planar structure of the main beam in the CATIA-based method for creating narrow-width steel box composite beam templates according to the present invention.

[0041] Figure 3 This is a 3D schematic diagram of the first section of the main beam in the CATIA-based method for creating narrow-width steel box girder templates in this invention.

[0042] Figure 4 This is a schematic diagram of the parameter set in the CATIA-based method for creating narrow-width steel box girder templates in this invention. Detailed Implementation

[0043] Typical embodiments embodying the features and advantages of the present invention will be specifically described in the following description. It should be understood that the present invention can have various variations in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations herein are for illustrative purposes only and not intended to limit the present invention.

[0044] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0045] Based on the function and role of narrow-width steel box girder composite beams, the creation of common narrow-width steel box girder composite beam structural templates can be mainly broken down into the following specific components: main beam, crossbeam, steel base plate, and bridge deck.

[0046] Specifically, the main beam structure can be broken down into the following components: main beam top plate, main beam bottom plate, main beam web, top plate stiffening ribs, bottom plate stiffening ribs, web vertical stiffening ribs, web longitudinal stiffening ribs, main beam top plate shear studs, main beam splicing plates, and high-strength bolts.

[0047] The structure of the crossbeam can be further divided into the following components: crossbeam top plate, crossbeam bottom plate, crossbeam web, crossbeam web stiffening ribs, crossbeam splicing plate, and high-strength bolts.

[0048] The structure of the steel base plate can be further divided into the following components: steel base plate, steel base plate transverse ribs, connecting angle steel, steel base plate connecting guardrail side plates, side plate splicing angle plates, side plate supporting angle steel, angle steel pressure plates, steel base plate shear studs, steel base plate splicing plates, side plate splicing, transverse rib perforated steel bars, and high-strength bolts.

[0049] The structure of the bridge deck can be further divided into the following components: bridge deck panel, bridge deck waterproof layer, bridge deck pavement layer, bridge deck panel transverse reinforcement, bridge deck panel longitudinal reinforcement, bridge deck crash barriers, and bridge deck crash barrier reinforcement.

[0050] In this embodiment, corresponding design parameters are assigned, which means renaming the corresponding lines, points, angles, volumes, strings, Booleans, real numbers, etc., so that the corresponding lines, points, angles, volumes, strings, Booleans, real numbers, etc. are linked with the corresponding names (that is, the corresponding design parameters).

[0051] Methods for creating narrow-width steel box girder formwork based on CATIA, such as Figure 1 As shown, it includes the following steps:

[0052] S1: Create the first parameter set, create the road design line, and define the starting point and ending point of the structural design positioning point through the road design line;

[0053] Specifically, S1 also includes the following steps:

[0054] S11: Define the first parameter set in the parameter set setting interface. The first parameter set includes the starting station location point, the ending station location point, the starting structural design location point, and the design parameters of the ending structural design location point.

[0055] S12: Create a new sketch based on the absolute axis XY plane, set the planar curve of the road design line and define the route starting point to form a horizontal line, then set the longitudinal slope and vertical curve of the road design line longitudinal section to form a longitudinal line, and automatically fit it into a 3D road design line through the 3D line module.

[0056] S13: Using the road design line projection as the baseline, define the starting and ending station locations of the narrow steel box girder segment on the road design line projection. Use the starting station location as the initial point, assign values ​​to the X and Y coordinates of the ending station location, set the X coordinate of the ending station location as the segment length, set the Y coordinate of the ending station location as the starting station location, and assign corresponding design parameters to the starting and ending station locations respectively.

[0057] S14: Project the starting station and ending station locations as the projection objects onto the road design line along the Z-axis of the absolute axis system, forming the starting structural design location and the ending structural design location, and assign corresponding design parameters to the starting structural design location and the ending structural design location, respectively.

[0058] In this embodiment, the starting station number is the same as the starting station number of the beam segment, and the ending station number is the same as the ending station number of the beam segment. In S13, the road design line is projected onto the XY plane of the absolute axis system along the Z-axis direction to form the road design line projection.

[0059] S2: Create the main beam parameter set;

[0060] Specifically, such as Figure 4 As shown, S2 further includes the following steps:

[0061] S21: Define the main beam parameter set in the parameter set setting interface. The main beam parameter set includes beam segment length, top plate width, top plate thickness, bottom plate width, bottom plate thickness, web height, web thickness, net web spacing, top plate stiffener height, top plate stiffener thickness, bottom plate stiffener height, bottom plate stiffener thickness, and top plate spacing.

[0062] In this embodiment, the main beam parameter set also includes the height of the vertical stiffeners in the web, the width of the vertical stiffeners in the web, the thickness of the vertical stiffeners in the web, the spacing of the vertical stiffeners in the web, the width of the longitudinal stiffeners in the web, the thickness of the longitudinal stiffeners in the web, the distance from the longitudinal stiffeners in the web to the top plate, the width of the splice plate of the main beam segment, the height of the splice plate of the main beam segment, the thickness of the splice plate of the main beam segment, the total height of the shear studs on the top plate of the main beam, the height of the shear stud head on the top plate of the main beam, the diameter of the shear studs on the top plate of the main beam, the diameter of the shear stud head on the top plate of the main beam, the transverse spacing of the shear studs on the top plate of the main beam, the longitudinal spacing of the shear studs on the top plate of the main beam, the transverse number of the shear studs on the top plate of the main beam, and the longitudinal number of the shear studs on the top plate of the main beam.

[0063] In this embodiment, when setting parameter sets for other components, a beam parameter set is defined in the parameter set setting interface. The beam parameter set includes the beam top plate width, beam bottom plate width, beam top plate thickness, beam bottom plate thickness, beam web height, beam web thickness, beam web stiffener width, beam web stiffener thickness, beam web stiffener spacing, beam web stiffener height, beam splice plate width, beam splice plate height, and beam splice plate thickness.

[0064] Define the steel base plate parameter set in the parameter set setting interface. The steel base plate parameter set includes the steel base plate thickness, end steel base plate length, steel base plate length above the crossbeam, horizontal length of the steel base plate hypotenuse, steel base plate transverse rib length, steel base plate transverse rib thickness, steel base plate transverse rib opening diameter, steel base plate transverse rib opening spacing, connecting angle steel length, height of the steel base plate connecting guardrail side plate, thickness of the steel base plate connecting guardrail side plate, length of the side plate splicing angle plate, width of the side plate splicing angle plate, length of the side plate supporting angle steel, and angle... Length of steel pressure plate, width of angle steel pressure plate, height of top shear studs on steel base plate, height of top shear stud head on steel base plate, diameter of top shear studs on steel base plate, diameter of top shear stud head on steel base plate, transverse spacing of top shear studs on steel base plate, longitudinal spacing of top shear studs on steel base plate, number of transverse top shear studs on steel base plate, number of longitudinal top shear studs on steel base plate, length of bottom steel plate splice plate, width of bottom steel plate splice plate, length of side plate splice, width of side plate splice, length of perforated reinforcing bars in transverse ribs, diameter of perforated reinforcing bars in transverse ribs.

[0065] Define the bridge deck parameter set in the parameter set setting interface. The bridge deck parameter set includes the bridge deck thickness, bridge deck waterproof layer thickness, bridge deck pavement layer thickness, bridge deck transverse reinforcement diameter, bridge deck transverse reinforcement spacing, bridge deck longitudinal reinforcement diameter, bridge deck longitudinal reinforcement spacing, bridge deck transverse reinforcement negative moment densification zone spacing, bridge deck longitudinal reinforcement densification zone spacing, bridge deck transverse reinforcement length, bridge deck longitudinal reinforcement length, bridge deck crash barrier height, and bridge deck crash barrier base width.

[0066] S3: Create the first reference axis system with the starting structural design positioning point as the origin, and create the first section wireframe diagram of the main beam and the 3D outline of the first section of the main beam. Assign the corresponding design parameters from the main beam parameter set to each outline in the first section wireframe diagram of the main beam.

[0067] Specifically, such as Figure 2 , 3 As shown, S3 also includes the following steps:

[0068] S31: Create a first reference axis system with the starting structural design positioning point as the origin, and use the YZ plane of the first reference axis system as the first sketch support surface;

[0069] S32: Create a wireframe diagram of the first section of the main beam based on the first sketch support surface. The wireframe diagram of the first section of the main beam includes the sketch outlines of the top plate, bottom plate, web plate, top plate stiffener, and bottom plate stiffener. Specifically, create the sketch outlines of the top plate, bottom plate, web plate, top plate stiffener, and bottom plate stiffener, and set geometric constraints and dimensional constraints for the sketch outlines of the top plate, bottom plate, web plate, top plate stiffener, and bottom plate stiffener, and / or further assign corresponding design parameters to the main beam parameter set.

[0070] S33: Create a 3D outline of the first section of the main beam from the wireframe diagram of the main beam, and obtain the 3D outline of the first section of the narrow steel box composite beam main beam at the starting structural design positioning point.

[0071] In this embodiment, creating the first reference axis system means creating a three-dimensional spatial coordinate system with the starting structural design positioning point as the origin.

[0072] S4: Create a second reference axis system with the final structural design positioning point as the origin, and create the main beam second section wireframe diagram and the main beam second section 3D outline. Assign the corresponding design parameters from the main beam parameter set to each outline in the main beam second section wireframe diagram.

[0073] Specifically, S4 also includes the following steps:

[0074] S41: Create a second reference axis system with the endpoint structural design positioning point as the origin, and use the YZ plane of the second reference axis system as the second sketch support surface;

[0075] S42: Create a second section wireframe diagram of the main beam based on the second sketch support surface. The second section wireframe diagram of the main beam includes the sketch outlines of the top plate, bottom plate, web plate, top plate stiffener, and bottom plate stiffener. Specifically, create the sketch outlines of the top plate, bottom plate, web plate, top plate stiffener, and bottom plate stiffener, and set geometric constraints and dimensional constraints for the sketch outlines of the top plate, bottom plate, web plate, top plate stiffener, and bottom plate stiffener, and / or further assign corresponding design parameters to the main beam parameter set.

[0076] S43: Create a 3D profile using the wireframe diagram of the second section of the main beam to obtain the 3D profile of the second section of the narrow steel box composite beam at the final structural design positioning point.

[0077] S5: The 3D outline of the first section of the main beam starts from the starting point of the structural design positioning point, and the 3D outline of the second section of the main beam starts from the ending point of the structural design positioning point. Both extend and connect along the road design line to create the parametric template of the main beam geometry.

[0078] In this embodiment, after the extension connection, the geometry of the main beam is further processed through the entity creation functions in the entity function module, such as boss, groove, revolved body, revolved slot, hole, rib, slot, solid blend, multi-section solid, mirror, translation, chamfer, add, remove, and intersect.

[0079] S6: Extract key design parameters from the main beam parameter set and create a main beam design table;

[0080] Specifically, S6 also includes the following steps:

[0081] S61: Classify the main beam parameter set design parameters according to their primary and secondary importance, and summarize the key design parameters of the main beam parameter set to create a main beam design table.

[0082] In this embodiment, the design table can organize the main beam parameter set together, making it convenient for subsequent searching, management and retrieval.

[0083] In this embodiment, classifying the main beam parameter set design parameters according to primary and secondary design parameters means classifying them according to primary design parameters and secondary design parameters. Among them, the parameters in the parameter set that can directly affect the design dimensions of the main beam are primary design parameters, also known as key design parameters. By modifying the primary / key design parameters in the parameter set, the adjustment of the design dimensions of the main beam can be directly controlled, such as the main beam height, main beam width, main beam top and bottom plate thickness, web thickness, and net web spacing.

[0084] Parameters that do not directly affect the design dimensions of the main beam are considered secondary design parameters, such as the total height of the shear studs on the top plate of the main beam, the height of the shear stud head, the diameter of the shear stud, and the diameter of the shear stud head.

[0085] In this embodiment, key design parameters refer to parameters that can directly affect the design dimensions of the main beam. By modifying the key design parameters in the parameter set, the adjustment of the design dimensions of the main beam can be directly controlled. For example, the main beam height, main beam width, main beam top plate thickness, main beam bottom plate thickness, web thickness, and net web spacing are all key design parameters of the main beam.

[0086] S7: Repeat S2-S6 to create parametric templates and design tables for the crossbeam, steel base plate, and bridge deck geometry, and use them as templates for narrow steel box girder composite beams;

[0087] S8: Create a resource table for searching, calling and managing parametric templates of main beams, crossbeams, steel bottom plates, bridge deck geometry and design tables of corresponding structures in narrow steel box girder composite beams;

[0088] S9: Iterate through the parametric templates and design tables of the main beam, crossbeam, steel base plate, and bridge deck geometry of the narrow-width steel box girder in the resource table, adjust the design parameter attributes, and automatically generate the geometry of the narrow-width steel box girder of the corresponding specifications.

[0089] In this embodiment, in the 3DEXPERIENCE CATIA Engineering Rules Capture module of the CATIA software, the scripting language is set by operating the editor. The scripting language is used to cyclically call the corresponding component geometry parameterized templates and design tables in the resource table. The operator can automatically generate the geometry of the narrow steel box girder of the corresponding specifications by adjusting the design parameters in the parameter design table.

[0090] Taking the creation of a parametric template for the main beam geometry as an example, the following explanation is provided:

[0091] Create a new 3D part in the 3DEXPERIENCE CATIA Civil Engineering 3D Design module of CATIA software, with the format 3dxml.

[0092] Define the first parameter set in the parameter setting interface. The first parameter set includes the design parameters of the starting station A1, the ending station A2, the starting structural design positioning point A3, and the ending structural design positioning point A4.

[0093] Create a new sketch based on the absolute axis XY plane, set the plane curve of the road design line C1 and define the route starting point to form a horizontal line. On this basis, set the longitudinal slope and vertical curve of the longitudinal section of the road design line C1 to form a longitudinal line. The 3D line module automatically fits the 3D road design line.

[0094] Project the road design line C1 along the Z-axis of the absolute axis system onto the XY plane of the absolute axis system to form the road design line projection C2. Use the road design line projection C2 as the baseline. Define the starting station A1 and ending station A2 of the narrow steel box girder segment on the road design line projection C2. Assign corresponding design parameters to the starting station A1 and ending station A2 respectively. Use the starting station A1 as the initial point and assign values ​​to the X and Y coordinates of the starting station A1. Set the X coordinate of the ending station A2 to the length of the girder segment and the Y coordinate to the Y coordinate of the starting station A1.

[0095] Using the starting station A1 and the ending station A2 as projection objects, project them onto the road design line C1 along the Z-axis of the absolute axis system, forming the starting structural design positioning point A3 and the ending structural design positioning point A4.

[0096] Define the main beam parameter set in the parameter set setting interface. The main beam parameter set includes beam segment length, top plate width, top plate thickness, bottom plate width, bottom plate thickness, web height, web thickness, net web spacing, top plate stiffener height, top plate stiffener thickness, bottom plate stiffener height, bottom plate stiffener thickness, top plate spacing, horizontal spacing from the top plate center to the structural design positioning point, and narrow steel box segment length.

[0097] Create a first reference axis system with the starting structural design positioning point A3 as the origin, and use the YZ plane of the first reference axis system as the first sketch support surface;

[0098] Create sketch outlines of the top plate, bottom plate, web plate, top plate stiffener, and bottom plate stiffener on the first sketch support surface. Set geometric and dimensional constraints for the sketch outlines of the top plate, bottom plate, web plate, top plate stiffener, and bottom plate stiffener respectively. Assign design parameters to the top plate (top plate width, top plate thickness, top plate spacing), bottom plate (bottom plate width, bottom plate thickness), web plate (web height, web thickness, net web spacing), top plate stiffener (top plate stiffener height, top plate stiffener thickness), and bottom plate stiffener (bottom plate stiffener height, bottom plate stiffener thickness) to create the first section wireframe of the main beam.

[0099] Create a 3D outline of the first section of the main beam from the wireframe diagram of the main beam to obtain the 3D outline of the first section of the narrow steel box composite beam at the starting structural design positioning point A3.

[0100] Create a second reference axis system with the final structural design positioning point A4 as the origin, and use the YZ plane of the second reference axis system as the second sketch support surface;

[0101] Create sketch outlines of the top plate, bottom plate, web plate, top plate stiffener, and bottom plate stiffener on the second sketch support surface. Set geometric and dimensional constraints for the sketch outlines of the top plate, bottom plate, web plate, top plate stiffener, and bottom plate stiffener respectively. Assign design parameters to the top plate (top plate width, top plate thickness, top plate spacing), bottom plate (bottom plate width, bottom plate thickness), web plate (web height, web thickness, net web spacing), top plate stiffener (top plate stiffener height, top plate stiffener thickness), and bottom plate stiffener (bottom plate stiffener height, bottom plate stiffener thickness) to create the second section wireframe of the main beam.

[0102] Create a 3D outline of the second section of the main beam from the wireframe diagram of the main beam to obtain the 3D outline of the second section of the narrow steel box composite beam at the final structural design positioning point.

[0103] The 3D outline of the first section of the main beam starts from the starting point structural design positioning point A3, and the 3D outline of the second section of the main beam starts from the ending point structural design positioning point A4. Both extend towards each other along the road design line C1 to create the parametric template of the main beam geometry.

[0104] The CATIA-based narrow-width steel box girder template creation system adopts the CATIA-based narrow-width steel box girder template creation method described above. It also includes a contour creation module, a parameter setting module, and a generation module. The contour creation module is used to create a parametric template of the narrow-width steel box girder geometry. The parameter setting module is used to assign contour design parameters to the narrow-width steel box girder geometry. The generation module is used to iteratively call the parametric template of the narrow-width steel box girder geometry, adjust the corresponding design parameter attributes, and automatically generate the geometry of the narrow-width steel box girder geometry of the corresponding specifications.

[0105] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A method for creating narrow-width steel box girder formwork based on CATIA, characterized in that: Includes the following steps: S1: Create the first parameter set, create the road design line, and define the starting point and ending point of the structural design positioning point through the road design line; S2: Create the main beam parameter set; S3: Create the first reference axis system with the starting structural design positioning point as the origin, and create the first section wireframe diagram of the main beam and the 3D outline of the first section of the main beam. Assign the corresponding design parameters from the main beam parameter set to each outline in the first section wireframe diagram of the main beam. S4: Create a second reference axis system with the final structural design positioning point as the origin, and create the main beam second section wireframe diagram and the main beam second section 3D outline. Assign the corresponding design parameters from the main beam parameter set to each outline in the main beam second section wireframe diagram. S5: The 3D outline of the first section of the main beam starts from the starting point of the structural design positioning point, and the 3D outline of the second section of the main beam starts from the ending point of the structural design positioning point. Both extend and connect along the road design line to create the parametric template of the main beam geometry. S6: Extract key design parameters from the main beam parameter set and create a main beam design table; S7: Repeat S2-S6 to create parametric templates and design tables for the crossbeam, steel base plate, and bridge deck geometry, and use them as templates for narrow steel box girder composite beams; S8: Create a resource table for searching, calling and managing parametric templates of main beams, crossbeams, steel bottom plates, bridge deck geometry and design tables of corresponding structures in narrow steel box girder composite beams; S9: Iterate through the parametric templates and design tables of the main beam, crossbeam, steel base plate, and bridge deck geometry of the narrow-width steel box girder in the resource table, adjust the design parameter attributes, and automatically generate the geometry of the narrow-width steel box girder of the corresponding specifications.

2. The method for creating narrow-width steel box girder templates based on CATIA according to claim 1, characterized in that: S1 also includes the following steps: S11: Define the first parameter set in the parameter set setting interface. The first parameter set includes the starting station location point, the ending station location point, the starting structural design location point, and the design parameters of the ending structural design location point. S12: Create a new sketch based on the absolute axis XY plane, set the planar curve of the road design line and define the route starting point to form a horizontal line, then set the longitudinal slope and vertical curve of the road design line longitudinal section to form a longitudinal line, and automatically fit it into a 3D road design line through the 3D line module. S13: Using the road design line projection as the baseline, define the starting and ending station locations of the narrow steel box girder segment on the road design line projection. Use the starting station location as the initial point, assign values ​​to the X and Y coordinates of the ending station location, set the X coordinate of the ending station location as the segment length, set the Y coordinate of the ending station location as the starting station location, and assign corresponding design parameters to the starting and ending station locations respectively. S14: Project the starting station and ending station locations as the projection objects onto the road design line along the Z-axis of the absolute axis system, forming the starting structural design location and the ending structural design location.

3. The method for creating narrow-width steel box girder templates based on CATIA according to claim 2, characterized in that: In S13, the road design line is projected along the Z-axis of the absolute axis system onto the XY plane of the absolute axis system to form the road design line projection.

4. The method for creating narrow-width steel box girder templates based on CATIA according to claim 1, characterized in that: S2 also includes the following steps: S21: Define the main beam parameter set in the parameter set setting interface. The main beam parameter set includes beam segment length, top plate width, top plate thickness, bottom plate width, bottom plate thickness, web height, web thickness, net web spacing, top plate stiffener height, top plate stiffener thickness, bottom plate stiffener height, bottom plate stiffener thickness, and top plate spacing.

5. The method for creating narrow-width steel box girder templates based on CATIA according to claim 1, characterized in that: S3 also includes the following steps: S31: Create a first reference axis system with the starting structural design positioning point as the origin, and use the YZ plane of the first reference axis system as the first sketch support surface; S32: Create the first section wireframe of the main beam based on the first sketch support surface. The first section wireframe of the main beam includes the sketch outlines of the top plate, bottom plate, web plate, top plate stiffener, and bottom plate stiffener. Create the sketch outlines of the top plate, bottom plate, web plate, top plate stiffener, and bottom plate stiffener, and set geometric constraints and dimensional constraints for the sketch outlines of the top plate, bottom plate, web plate, top plate stiffener, and bottom plate stiffener, and assign the corresponding design parameters to the parameter set of the main beam. S33: Create a 3D outline of the first section of the main beam from the wireframe diagram of the main beam, and obtain the 3D outline of the first section of the narrow steel box composite beam main beam at the starting structural design positioning point.

6. The method for creating narrow-width steel box girder templates based on CATIA according to claim 1, characterized in that: S4 also includes the following steps: S41: Create a second reference axis system with the endpoint structural design positioning point as the origin, and use the YZ plane of the second reference axis system as the second sketch support surface; S42: Create the second section wireframe diagram of the main beam based on the second sketch support surface. The second section wireframe diagram of the main beam includes the sketch outlines of the top plate, bottom plate, web plate, top plate stiffener, and bottom plate stiffener. Create the sketch outlines of the top plate, bottom plate, web plate, top plate stiffener, and bottom plate stiffener, and set geometric constraints and dimensional constraints for the sketch outlines of the top plate, bottom plate, web plate, top plate stiffener, and bottom plate stiffener, and assign the corresponding design parameters to the parameter set of the main beam. S43: Create a 3D profile using the wireframe diagram of the second section of the main beam to obtain the 3D profile of the second section of the narrow steel box composite beam at the final structural design positioning point.

7. The method for creating narrow-width steel box girder templates based on CATIA according to claim 1, characterized in that: S6 also includes the following steps: S61: Classify the main beam parameter set design parameters according to their primary and secondary importance, and summarize the key design parameters of the main beam parameter set to create a main beam design table.

8. A CATIA-based narrow-width steel box girder formwork creation system, characterized in that: The method for creating a narrow steel box girder template based on CATIA according to any one of claims 1-7 further includes a contour creation module, a parameter setting module, and a generation module. The contour creation module is used to create a parametric template of the geometry of the narrow steel box girder. The parameter setting module is used to assign contour design parameters to the geometry of the narrow steel box girder. The generation module is used to cyclically call the parametric template of the geometry of the narrow steel box girder and adjust the corresponding design parameter attributes to automatically generate the geometry of the narrow steel box girder of the corresponding specifications.

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