Modeling method of the connection between variable-section roof beams and columns based on Tekla platform

Abstract

The present application discloses a modeling method for the connection between a variable-section roof beam and a column based on the Tekla platform. The modeling method includes: establishing a three-dimensional model of the variable-section roof beam and a three-dimensional model of the column; adjusting the position of the end handle of the variable-section roof beam according to the second connection node; determining the position of the actual large end of the variable-section roof beam and the connection surface of the first connection node according to the first connection node; determining the lower flange strike line of the variable-section roof beam according to the adjusted position of the end handle of the variable-section roof beam and the position of the connection surface; determining the target position of the start handle of the variable-section roof beam according to the lower flange strike line; adjusting the initial start handle of the variable-section roof beam to the target position of the start handle; creating a cutting surface at the connection surface position to complete the correction of the shape of the large end of the variable-section roof beam. Therefore, through the operations of steps S1 to S7, the heights of the actual large end and the actual small end accurately meet the requirements of the engineering project design drawings.

Description

Technical Field

[0001] The present application relates to the field of three-dimensional construction based on the Tekla platform, and more specifically to a modeling method for the connection between variable-section roof beams and columns based on the Tekla platform. Background Art

[0002] Portal frame structures are widely used in industrial and civil buildings, including industrial, commercial, and cultural and entertainment facilities, due to their simple load-bearing system, clear force transmission paths, rapid component fabrication, ease of factory processing, short construction periods, and minimal steel consumption. Portal frame roof beams often utilize variable cross-sections, which align well with the structure's internal force diagrams, ensuring optimal load distribution and saving steel.

[0003] Due to roof drainage requirements, the roof beams are designed with a slope. Furthermore, variable-section roof beams have unique operational characteristics within the Tekla platform, creating difficulties for steel structure detailing designers in controlling the actual height of the larger end of the variable-section roof beam at the connection to the column. When modeling the connection between portal steel frame variable-section roof beams and columns within the Tekla platform, steel structure detailing designers typically set the variable-section roof beam's starting handle directly on the column's centerline and then draw the beam-column connection node alongside the column. This requires cutting away the larger end of the variable-section roof beam when establishing the beam-column connection node. This often results in the actual larger end height of the variable-section roof beam failing to meet design requirements. This situation becomes increasingly pronounced as the cross-sectional dimensions of the column and the variable-section roof beam increase.

[0004] To this end, the present application provides a modeling method for the connection between variable-section roof beams and columns based on the Tekla platform to at least partially solve the above problems. Summary of the Invention

[0005] The Summary of the Invention introduces a series of simplified concepts that will be further described in the Specific Examples section. The Summary of the Invention section of this application is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] The present application provides a modeling method for the connection between a variable-section roof beam and a column based on the Tekla platform. The variable-section roof beam is located on one side of the column. The actual large end of the variable-section roof beam is connected to the column through a first connection node. The plane where the upper flange of the variable-section roof beam is located and the plane where the lower flange of the roof beam is located are both at an angle with the horizontal direction. The modeling method includes:

[0007] Step S1: Establish a three-dimensional model of a variable-section roof beam and a three-dimensional model of a column, wherein the initial starting handle of the variable-section roof beam is located at the corner of the top of the three-dimensional model of the column, the initial ending handle of the variable-section roof beam is located at the second connection node between the small end of the variable-section roof beam and other steel beams, and the corner is located at the end of the three-dimensional model of the column away from the small end of the variable-section roof beam;

[0008] Step S2: adjusting the position of the end handle of the variable-section roof beam according to the second connection node;

[0009] Step S3, determining the position of the actual large end of the variable-section roof beam and the connection surface of the first connection node according to the first connection node;

[0010] Step S4, determining the lower flange strike line of the variable-section roof beam according to the adjusted position of the end handle of the variable-section roof beam and the position of the connection surface;

[0011] Step S5: determining the target position of the starting handle of the variable-section roof beam according to the lower flange strike line;

[0012] Step S6: adjusting the initial starting handle of the variable-section roof beam to the target position of the starting handle;

[0013] Step S7: Create a cutting surface at the connection surface position to complete the correction of the large end shape of the variable-section roof beam.

[0014] According to the modeling method of the present application, through the operations of steps S1 to S7, the heights of the actual large end and the actual small end accurately meet the requirements of the engineering project design drawings.

[0015] Optionally, step S2 includes:

[0016] The second connection node includes a second beam end plate, the thickness of the second beam end plate is determined, and the position of the end control handle of the variable-section roof beam is adjusted according to the thickness of the second beam end plate.

[0017] Optionally, the initial end handle of the variable-section roof beam is moved toward the column along the vector direction D1 to adjust the position of the end handle, the moving distance of the initial end handle is an integer multiple of the thickness of the second beam end plate, and the vector direction D1 is the extension direction of the line connecting the initial end handle and the initial start handle.

[0018] Optionally, step S3 includes:

[0019] The first connection node includes a first beam end plate and a column flange reinforcement plate, and the thickness of the first beam end plate and the thickness of the flange reinforcement plate are determined;

[0020] Along the flange setting direction, the first auxiliary line is formed by translating the position of the intersection line of the right column flange and the column web close to the small end of the variable-section roof beam. The first auxiliary line is located at the connecting surface, wherein the distance between the first auxiliary line and the intersection line is determined according to the thickness of the first beam end plate and the thickness of the flange reinforcement plate. The left column flange and the right column flange of the column are spaced apart along the flange setting direction.

[0021] Optionally, the distance between the first auxiliary line and the intersection line is an integer multiple of the sum of the thickness of the first beam end plate and the thickness of the column flange reinforcement plate.

[0022] Optionally, step S4 includes:

[0023] Determine the lowest point of the small end of the variable-section roof beam as the lower flange corner point A;

[0024] Determine the intersection of the first auxiliary line and the top surface of the variable-section roof beam as the first auxiliary point B;

[0025] Set a second auxiliary point C, which is located directly below the first auxiliary point B. The vertical distance between the second auxiliary point C and the first auxiliary point B is determined based on the actual height of the large end of the variable-section roof beam.

[0026] Set the lower flange strike line connecting the second auxiliary point C and the lower flange corner point A.

[0027] Optionally, the distance between the second auxiliary point C and the first auxiliary point B in the vertical direction is an integer multiple of the height of the actual large end of the variable-section roof beam.

[0028] Optionally, step S5 includes:

[0029] A third auxiliary line is set parallel to the top surface of the variable-section roof beam. The third auxiliary line is located on the lower side of the variable-section roof beam. The distance between the third auxiliary line and the top surface of the variable-section roof beam is determined according to the actual design height of the large end of the variable-section roof beam.

[0030] Determine the intersection of the third auxiliary line and the lower flange strike line as the third auxiliary point D;

[0031] Set a vertical line that passes through the third auxiliary point D and is perpendicular to the top surface of the variable-section roof beam. The foot of the vertical line and the top surface of the variable-section roof beam is the target position of the start handle position.

[0032] Optionally, the distance between the third auxiliary line and the top surface of the variable-section roof beam is an integer multiple of the actual large-end design height of the variable-section roof beam.

[0033] Optionally, in step S1, a three-dimensional model of a roof beam with a variable cross-section and a three-dimensional model of a column are established according to the requirements of the engineering project design drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to make the advantages of the present application more easily understood, the present application briefly described above will be described in more detail with reference to specific embodiments shown in the accompanying drawings. It will be understood that these drawings depict only typical embodiments of the present application and are therefore not to be considered as limiting the scope of protection thereof. The accompanying drawings describe and explain the present application with additional specificity and detail.

[0035] Figure 1 A schematic diagram of a model for establishing a complete connection between a roof beam with a variable cross-section and a column according to a modeling method of a preferred embodiment of the present application;

[0036] Figure 2 for Figure 1 A schematic diagram of a three-dimensional model of a variable-section roof beam and a three-dimensional model of a column established in step S1 of the modeling method;

[0037] Figure 3 For Figure 2 On the basis of the above, the modeling method adjusts the position of the initial end handle of the variable-section roof beam through step S2, and then updates the model schematic diagram of the variable-section roof beam and the column;

[0038] Figure 4 For Figure 3 On the basis of the above, the modeling method adds a model schematic diagram of the first auxiliary line through step S3;

[0039] Figure 5 For Figure 4 On the basis of the above, the modeling method adds a model schematic diagram of the first auxiliary point B, the second auxiliary point C and the second auxiliary line through step S4;

[0040] Figure 6 For Figure 5 On the basis of the above, the modeling method adds a model schematic diagram of a third auxiliary line, a third auxiliary point D, a perpendicular line and a perpendicular foot through step S5;

[0041] Figure 7 For Figure 6 On the basis of the above, the modeling method adjusts the position of the initial starting handle of the variable-section roof beam through step S6, and then updates the model schematic diagram of the variable-section roof beam and the column;

[0042] Figure 8 For Figure 7 Based on the above, the modeling method creates a cutting surface in step S7, and then provides a schematic diagram of a model of a roof beam and a column with a variable cross-section.

[0043] Description of Reference Numerals

[0044] 110: Column 111: Left column flange

[0045] 112: Right column flange 113: Column web

[0046] 120: Variable cross-section roof beam 121: Large end

[0047] 122: Small end 123, roof beam upper flange

[0048] 124: Roof beam lower flange 125, roof beam web

[0049] 126, top surface 127, connection surface

[0050] 201: Flange reinforcement plate 202: First beam end plate

[0051] 203: Second beam end plate 301: Lower flange corner point A

[0052] 302: First auxiliary point B 303: Second auxiliary point C

[0053] 304: Third auxiliary point D 305: Perpendicular foot

[0054] 401: Intersection line 402: First auxiliary line

[0055] 403: Second auxiliary line 404: Third auxiliary line

[0056] 405: Vertical line 901: Starting handle

[0057] 902: End handle DETAILED DESCRIPTION

[0058] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present application. However, it will be apparent to those skilled in the art that the present application embodiments can be implemented without one or more of these details. In other examples, some technical features well known in the art are not described to avoid confusion with the present application embodiments.

[0059] The preferred embodiments of the present application are described below with reference to the accompanying drawings. It should be noted that the terms "upper", "lower" and similar expressions used herein are for illustrative purposes only and are not intended to be limiting.

[0060] In this document, ordinal numbers such as “first” and “second” cited in this application are merely identifiers and do not have any other meanings, such as a specific order, etc.

[0061] To thoroughly understand the embodiments of the present application, the following description will provide a detailed explanation. Obviously, the implementation of the embodiments of the present application is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present application are described in detail below, but in addition to these detailed descriptions, the present application may also have other embodiments.

[0062] This application provides a Tekla platform-based modeling method for the connection between a variable-section roof beam 120 and a column 110. In the modeling method for the connection between the column 110 and the variable-section roof beam 120, the actual height dimensions of the large end and the small end of the variable-section roof beam 120 precisely meet the design requirements.

[0063] The effect of the column 110 and the variable cross-section roof beam 120 modeled according to the modeling method provided in this application is as follows: Figure 1 shown.

[0064] The column 110 is an H-shaped steel. The column 110 includes a column flange and a column web 113. The column flange includes a left column flange 111 and a right column flange 112. The plane where the left column flange 111 is located is parallel to the plane where the right column flange 112 is located. The left column flange 111 and the right column flange 112 are arranged along the flange setting direction D2 (the flange setting direction D2 is perpendicular to the plane where the flange is located, that is, the flange setting direction D2 is Figure 2 The column web 113 is located between the left column flange 111 and the right column flange 112. The plane where the left column flange 111 is located, the plane where the right column flange 112 is located, and the plane where the column web 113 is located are all parallel to the vertical direction. The plane where the left column flange 111 is located and the plane where the right column flange 112 is located are both perpendicular to the plane where the column web 113 is located. In this way, the length direction of the column 110 is parallel to the vertical direction. Along the length direction of the column 110, the height (the dimension of the cross-sectional shape of the column 110 along the flange setting direction D2) of the cross-sectional shape of the column 110 at different positions (the cross-sectional shape is perpendicular to the length direction of the column 110) is consistent.

[0065] like Figures 2 to 8As shown, the variable-section roof beam 120 is an H-shaped steel. The variable-section roof beam 120 includes an upper flange 123, a lower flange 124, and a web 125. The upper flange 123 is located above the lower flange 124. The web 125 is located between the upper flange 123 and the lower flange 124. The plane of the web 125 is parallel to the vertical direction. The planes of the upper flange 123 and the lower flange 124 are both perpendicular to the plane of the web 125. The plane of the web 125 is parallel to the plane of the column web 113. The plane of the roof beam upper flange 123 (parallel to the top surface 126 of the variable-section roof beam 120) and the plane of the roof beam lower flange 124 (parallel to the bottom surface of the variable-section roof beam 120) each form different angles with the horizontal plane. Thus, along the length of the variable-section roof beam 120, the height (the vertical dimension of the roof beam cross-section) of the roof beam cross-section (this cross-section is perpendicular to the plane of the roof beam web 125 and parallel to the vertical direction) at different locations varies. The end with the greater cross-section height is designated as the larger end 121. The end with the smaller cross-section height is designated as the smaller end 122.

[0066] like Figure 1 As shown, the variable-section roof beam 120 is located on one side of the column 110 in the horizontal direction. The actual large end of the variable-section roof beam 120 is connected to the column 110 through a first connection node.

[0067] Specifically, a portion of one of the left and right column flanges 111 and 112 near the variable-section roof beam 120 is removed to form an installation notch. In this case, a portion of the right column flange 112 is removed to form the installation notch. This notch is then replaced by a flange reinforcement plate 201. The thickness of the flange reinforcement plate 201 is greater than that of the column flange. The plane on which the flange reinforcement plate 201 lies is parallel to the vertical direction and perpendicular to the plane on which the column web 113 lies. The flange reinforcement plate 201 is welded into the installation notch. The flange reinforcement plate 201 and the column web 113 are in close contact. The end of the flange reinforcement plate 201, facing away from the column web 113, protrudes outward from the column 110. In other words, one side of the flange reinforcement plate 201 is in contact with the column web 113. The other side of the flange reinforcement plate 201 protrudes beyond the side of the right column flange 112 facing away from the left column flange 111.

[0068] A first beam end plate 202 is welded to the actual large end of the variable-section roof beam 120. The plane of the first beam end plate 202 is parallel to the plane of the flange reinforcement plate 201. The first beam end plate 202 is attached to the side of the flange reinforcement plate 201 facing away from the column web 113. The first beam end plate 202 is fixedly connected to the flange reinforcement plate 201 via bolts. Thus, the first connection node includes the first beam end plate 202 and the flange reinforcement plate 201.

[0069] The actual small end of the variable-section roof beam 120 is connected to other steel beams through a second connection node. The second connection node includes a second beam end plate 203. The actual small end of the variable-section roof beam 120 is welded to the side of the second beam end plate 203. The plane where the second beam end plate 203 is located is perpendicular to the plane where the roof beam upper flange 123 is located. The plane where the second beam end plate 203 is located is perpendicular to the plane where the roof beam web 125 is located. Other steel beams can be fitted with the side of the second beam end plate 203 away from the column 110 and fixedly connected by bolts. The side of the second beam end plate 203 away from the column 110 is the location of the connection node between the other steel beams and the variable-section roof beam 120. Since the other steel beams are not related to the modeling method provided in this application, this application does not provide additional description of the modeling method for other steel beams.

[0070] It will be appreciated that, in an embodiment not shown, the left column flange may also be provided with a mounting notch. At this point, the other side of the flange reinforcement plate protrudes to a side of the left column flange away from the right column flange.

[0071] The column flange resection, flange reinforcement plate 201, first beam end plate 202 and second beam end plate 203 mentioned in the above description are not involved in the modeling method provided by this application. They are merely auxiliary tools added to explain the modeling method provided by this application more simply and intuitively. Therefore, this application does not make additional description of their modeling method.

[0072] The modeling method includes steps S1 to S7.

[0073] Step S1: Create a three-dimensional model of the column 110 and the variable-section roof beam 120.

[0074] like Figure 2 As shown, the dimensions of the columns 110 and the dimensions of the variable-section roof beams 120, as well as their relative positions and connection methods, can be determined in advance using the project design drawings. The method for creating a 3D model on the Tekla platform is conventional and will not be further described here.

[0075] It is worth mentioning that the following methods and definitions are used to create steel structure models (3D models) such as beams (including variable-section roof beams 120) and columns (including columns 110) on the Tekla platform:

[0076] 1. The model of steel structural components such as beams and columns includes a starting point and an ending point. The Tekla platform will automatically create the starting point of the steel structural component model as the starting handle 901 of the steel structural component model. The ending point of the steel structural component model will be automatically created as the ending handle 902 of the steel structural component model. The starting handle 901 and the ending handle 902 are both located at the center plane of the width direction of the beam and column. For example, the starting handle 901 and the ending handle 902 of the variable-section roof beam 120 of the present application are both located at the center plane of the roof beam web 125. The center plane of the roof beam web 125 is parallel to the plane where the roof beam web 125 is located, and extends through the center of the roof beam web 125 along the thickness direction of the roof beam web 125.

[0077] It is understood that in an embodiment not shown, the start handle and the end handle may also be located on other actual planes of the steel structure model. The actual plane is parallel to the center plane of the width direction of the beam and column. At this time, when it is necessary to adopt the position of the start handle and the end handle of the steel structure model, the position of the projection of the start handle and the end handle of the steel structure model on the center plane of the width direction of the beam and the column is used as the position of the start handle and the end handle of the steel structure model. After adjusting the position of the end handle in step S2 below, the Tekla platform will use the position of the projection of the adjusted end handle on the actual plane as the current end handle to update the three-dimensional model of the variable-section roof beam. In step S6 below, after the initial start handle of the variable-section roof beam is adjusted to the target position of the start handle. The Tekla platform will use the position of the projection of the adjusted target position of the start handle on the actual plane as the current start handle to update the three-dimensional model of the variable-section roof beam.

[0078] It should be noted that the corners, the positions of other steel beam connection nodes, the lower flange corner point A301, the first auxiliary point B302, the second auxiliary point C303, the third auxiliary point D304, the perpendicular foot 305, the first auxiliary line 402, the second auxiliary line 403, the third auxiliary line 404 and the perpendicular line 405 mentioned later are all located on the center plane of the roof beam web 125.

[0079] 2. The direction from the start handle 901 to the end handle 902 is the vector direction D1 of the steel structure model. Vector direction D1 can generally be understood as the length direction of the steel structure model. During the execution of the method in this article, vector direction D1 does not change.

[0080] 3. The steel structure model's start handle 901 and end handle 902 can be moved in any direction using the mouse. Moving these handles (start handle 901 and end handle 902) changes the steel structure model's physical properties, including its length, direction, and shape. Changing these handles rebuilds the steel structure model.

[0081] 4. Regarding the modeling method described in this application, the following features are present on the Tekla platform: the start handle 901 of the variable-section roof beam 120 is bound to the position of the large end 121 of the variable-section roof beam 120. The end handle 902 of the variable-section roof beam 120 is bound to the position of the small end 122. In other words, the start handle 901 of the variable-section roof beam 120 is located at the large end 121, and the end handle 902 of the variable-section roof beam 120 is located at the small end 122. Both the start handle 901 and the end handle 902 are located in the plane of the top surface 126 of the variable-section roof beam 120. When the beam ends (large end 121 and small end 122) of the variable-section roof beam 120 are in a free state, that is, no operation is performed on the beam ends (for example, the operation of creating a cutting surface at the large end 121 of the variable-section roof beam 120 mentioned in step S7 later in this application), the position of the starting control handle 901 moves, and the large end 121 of the variable-section roof beam 120 moves accordingly; when the position of the ending control handle 902 moves, the small end 122 of the variable-section roof beam 120 moves accordingly.

[0082] 5. Normally, in order to make the modeling work simpler and more convenient. At the beginning of modeling, the initial starting handle 901 of the variable-section roof beam 120 will be temporarily set at the corner of the top of the column 110. Along the flange setting direction D2, the corner is located at the end of the top of the column 110 away from the variable-section roof beam 120. The initial ending handle 902 of the variable-section roof beam 120 is temporarily set at the position of the connection node (second connection node) between the variable-section roof beam 120 and other steel beams. The modeling method provided in this application still adopts this setting. The position of the connection node between the variable-section roof beam 120 and other steel beams can be determined in advance by the engineering project design drawings.

[0083] That is, the three-dimensional model of the column 110 and the three-dimensional model of the variable-section roof beam 120 established in step S1 are as follows: Figure 2 In the three-dimensional model of the column 110 and the three-dimensional model of the variable-section roof beam 120 established in step S1, the small end 122 is located at the second beam end plate 203 ( Figure 2 The large end 121 is located at the corner of the top end of the column 110 , on the side away from the column 110 (indicated by the dotted line).

[0084] Step S2 is performed after step S1.

[0085] Step S2: Adjust the position of the end handle 902 according to the second connection node.

[0086] In the 3D models of column 110 and variable-section roof beam 120 created in step S1, small end 122 is located on the side of the second beam end plate 203, which will be installed later, away from column 110. To this end, the position of end handle 902 is adjusted based on the second connection node. After adjusting end handle 902, the Tekla platform updates the 3D model of variable-section roof beam 120, ensuring that small end 122 of variable-section roof beam 120 is the actual small end, thus meeting the requirements of the project design drawings.

[0087] like Figure 3 As shown, the position of the end control handle 902 is adjusted according to the thickness of the second beam end plate 203. The thickness of the second beam end plate 203 can be predetermined by the engineering design drawings. In this way, the actual small end of the variable-section roof beam 120 can be made to meet the requirements of the engineering design drawings.

[0088] Furthermore, the initial end handle 902 is moved along the vector direction D1 of the variable-section roof beam 120 toward the column 110 to determine the final end handle 902. The initial end handle 902 movement distance is an integer multiple of the thickness of the second beam end plate 203. This ensures that the actual small end of the variable-section roof beam 120 meets the requirements of the project design drawings.

[0089] After the end control handle 902 is moved, the actual small end of the variable-section roof beam 120 is determined in the updated three-dimensional model of the variable-section roof beam 120. The lower flange corner point A301 of the actual small end of the latest three-dimensional model of the variable-section roof beam 120 is determined. Lower flange corner point A301 is located in the plane of the bottom surface of the variable-section roof beam 120. Lower flange corner point A301 is the lowest point of the actual small end. The actual small end can be aligned with the second beam end plate 203 established later, so that it can be connected to other steel beams through the second beam end plate 203.

[0090] Step S3 is executed after step S2.

[0091] Step S3: Determine the position of the actual large end of the variable-section roof beam 120 and the connection surface 127 of the first connection node based on the first connection node. Connection surface 127 is the connection surface between the first beam end plate 202 and the actual large end of the variable-section roof beam 120. Connection surface 127 is perpendicular to the plane of the roof beam web 125.

[0092] like Figure 4As shown, on the center plane of the roof beam web 125, a first auxiliary line 402 is formed by translating the intersection line 401 between the right column flange 112 and the column web 113 along the flange arrangement direction D2. First auxiliary line 402 is located on the side of intersection line 401 that is closer to the variable-section roof beam 120. Along the flange arrangement direction D2, the distance between first auxiliary line 402 and intersection line 401 can be determined by the thickness of the flange stiffener 201 and the first beam end plate 202. The thickness of the flange stiffener 201 and the first beam end plate 202 can be determined in advance based on the project design drawings.

[0093] The first auxiliary line 402 is located at the connection surface 127 of the first beam end plate 202 and the variable-section roof beam 120 .

[0094] Furthermore, along the flange setting direction D2, the distance between the first auxiliary line 402 and the intersection line 401 is an integer multiple of the sum of the thickness of the flange reinforcement plate 201 and the thickness of the first beam end plate 202.

[0095] Step S4 is executed after step S3.

[0096] Step S4: Determine the lower flange direction line of the variable-section roof beam 120 according to the adjusted position of the end control handle 902 of the variable-section roof beam 120 and the position of the connecting surface 127 .

[0097] like Figure 5 As shown, on the center plane of the roof beam web 125 , the intersection of the first auxiliary line 402 and the top surface 126 of the variable-section roof beam 120 is marked as a first auxiliary point B302 .

[0098] The first auxiliary point B302 is translated vertically downward to form the second auxiliary point C303. Thus, the second auxiliary point C303 is located directly below the first auxiliary point B302. The vertical distance between the second auxiliary point C303 and the first auxiliary point B302 is determined based on the actual height of the large end of the variable-section roof beam 120.

[0099] The actual large end height of the variable cross-section roof beam 120 is the actual large end dimension of the variable cross-section roof beam 120 in the vertical direction. The actual large end height of the variable cross-section roof beam 120 can be determined in advance based on the engineering project design drawings.

[0100] The lower flange corner point A301 and the second auxiliary point C303 are connected to form a second auxiliary line 403. The second auxiliary line 403 is the lower flange strike line of the variable-section roof beam 120. Thus, the lower flange strike line can be accurately determined.

[0101] Furthermore, in the vertical direction, the distance from the second auxiliary point C303 to the first auxiliary point B302 is an integer multiple of the actual height of the large end of the variable-section roof beam 120. Thus, the bottom flange strike line can be accurately determined.

[0102] Step S5 is executed after step S4.

[0103] Step S5: Determine the target position of the starting handle 901 of the variable-section roof beam 120 according to the lower flange trend line.

[0104] In the 3D models of column 110 and variable-section roof beam 120 created in step S1, the large end 121 is located at the corner of the top end of column 110. To this end, the target position of start handle 901 is redefined. By moving the initial start handle 901 to this target position, the Tekla platform updates the 3D model of variable-section roof beam 120, ensuring that the large end 121 of variable-section roof beam 120 is the actual large end, thereby ensuring that variable-section roof beam 120 meets the requirements of the project design drawings.

[0105] like Figure 6 As shown, a third auxiliary line 404 is drawn on the center plane of the roof beam web 125, parallel to the top surface 126 of the variable-section roof beam 120. The distance between the third auxiliary line 404 and the top surface 126 of the variable-section roof beam 120 can be determined based on the actual height of the large end of the variable-section roof beam 120. The third auxiliary line 404 is located on the lower side of the top surface 126 of the variable-section roof beam 120.

[0106] The intersection of the third auxiliary line 404 and the second auxiliary line 403 is recorded as a third auxiliary point D304.

[0107] On the center plane of the roof beam web 125, a perpendicular line 405 is drawn from the third auxiliary point D304 to the top surface 126 of the variable-section roof beam 120. The intersection of the perpendicular line 405 and the top surface 126 is the foot 305 of the perpendicular line 405 and the top surface 126.

[0108] The vertical foot 305 is the target position of the starting handle 901 of the variable-section roof beam 120 .

[0109] Furthermore, the distance between the third auxiliary line 404 and the top surface 126 of the variable-section roof beam 120 is an integer multiple of the actual height of the large end of the variable-section roof beam 120 .

[0110] Step S6 is executed after step S5.

[0111] Step S6: Adjust the initial starting handle 901 of the variable-section roof beam 120 to the target position of the starting handle 901 .

[0112] like Figure 7 As shown, the initial start handle 901 is moved along the vector direction D1 of the variable-section roof beam 120 to the vertical foot 305. At this time, the Tekla platform automatically updates the 3D model of the variable-section roof beam 120.

[0113] The adjusted start handle 901 and end handle 902 are both located in the plane where the top surface 126 of the variable-section roof beam 120 is located.

[0114] Step S7 is executed after step S6.

[0115] Step S7: Create a cutting surface of the large end 121 of the variable-section roof beam 120 at the connection surface 127 .

[0116] like Figure 8 As shown, the large end 121 of the variable-section roof beam 120 is cut by the first auxiliary line 402 to create a cutting surface (the cutting surface is perpendicular to the plane where the roof beam web 125 is located), completing the correction of the shape of the large end 121 of the variable-section roof beam 120 to meet the requirement of creating the connection node between the actual large end of the variable-section roof beam 120 and the column 110. The first auxiliary line 402 is located on the cutting surface. The cutting surface constitutes the actual large end of the variable-section roof beam 120. After the cutting surface is created, the starting handle 901 of the variable-section roof beam 120 remains at the perpendicular foot 305. The cutting surface can fit the first beam end plate 202 created subsequently.

[0117] The method for creating a cut surface for a 3D model on the Tekla platform is conventional technology and will not be further described here. Furthermore, in the results described herein, the creation of the actual cut surface of the large end of the variable-section roof beam 120 is characterized by the start handle 901 remaining in position (at the vertical foot 305), which is a normal result of normal operation.

[0118] Through the operations of steps S1 to S7, the actual large end of the variable-section roof beam 120 is located at the correct position where the variable-section roof beam 120 connects to the first beam end plate 202, and the actual small end is located at the correct position where the variable-section roof beam 120 connects to the second beam end plate 203. The heights of the actual large end and the actual small end both accurately meet the requirements of the project design drawings.

[0119] The subsequent modeling work of creating the connection node between the variable-section roof beam 120 and the column 110 (the first connection node) and the connection node between the variable-section roof beam 120 and other steel beams (the second connection node) can be completed directly on this basis, providing convenient conditions for subsequent modeling work.

[0120] The present application has been described through the above-described embodiments, but it should be understood that the above-described embodiments are for illustrative and illustrative purposes only and are not intended to limit the present application to the described embodiments. In addition, it will be understood by those skilled in the art that the present application is not limited to the above-described embodiments, and that various variations and modifications may be made based on the teachings of the present application, all of which fall within the scope of protection claimed in the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

[0121] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art in the technical field of this application. The terms used herein are only for describing specific implementation purposes and are not intended to limit this application. Terms such as "component" and the like appearing herein may refer to either a single part or a combination of multiple parts. Terms such as "installation" and "setting" appearing herein may refer to either a component being directly attached to another component or a component being attached to another component through an intermediary. Features described herein in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise stated.

Claims

1. A method for modeling the connection between a variable-section roof beam and a column based on the Tekla platform, wherein the variable-section roof beam is located on one side of the column, the actual large end of the variable-section roof beam is connected to the column via a first connection node, and the plane where the upper flange of the roof beam and the plane where the lower flange of the roof beam are located are both at an angle with the horizontal direction, characterized in that: The modeling method includes: Step S1: Establish a three-dimensional model of the variable-section roof beam and a three-dimensional model of the column, wherein the initial starting handle of the variable-section roof beam is located at the corner of the top of the three-dimensional model of the column, and the initial ending handle of the variable-section roof beam is located at the second connection node between the small end of the variable-section roof beam and other steel beams, and the corner is located at the end of the three-dimensional model of the column away from the small end of the variable-section roof beam; Step S2: adjusting the position of the end handle of the variable-section roof beam according to the second connection node; Step S3, determining the position of the connection surface between the actual large end of the variable-section roof beam and the first connection node according to the first connection node; Step S4, determining the lower flange strike line of the variable-section roof beam according to the adjusted position of the end control handle and the position of the connecting surface of the variable-section roof beam; Step S5: determining a target position of a starting control handle of the variable-section roof beam according to the lower flange strike line; Step S6: adjusting the initial starting handle of the variable-section roof beam to the target position of the starting handle; Step S7, create a cutting surface at the connection surface position, complete the modification of the variable cross-section roof beam large end shape; The step S2 comprises: The second connection node includes a second beam end plate, the thickness of the second beam end plate is determined, and the position of the end control handle of the variable-section roof beam is adjusted according to the thickness of the second beam end plate; The step S3 comprises: The first connection node includes a first beam end plate and a column flange reinforcement plate, and the thickness of the first beam end plate and the thickness of the flange reinforcement plate are determined; Along the flange setting direction, a first auxiliary line is formed by translating the intersection line of the right column flange and the column web close to the small end of the variable-section roof beam, and the first auxiliary line is located at the connection surface, wherein the distance between the first auxiliary line and the intersection line is determined according to the thickness of the first beam end plate and the thickness of the flange reinforcement plate, and the left column flange and the right column flange of the column are spaced apart along the flange setting direction; The step S4 comprises: Determine the lowest point of the small end of the variable-section roof beam as the lower flange corner point A; Determine the intersection of the first auxiliary line and the top surface of the variable-section roof beam as a first auxiliary point B; Setting a second auxiliary point C, where the second auxiliary point C is located directly below the first auxiliary point B, and determining the vertical distance between the second auxiliary point C and the first auxiliary point B according to the actual height of the large end of the variable-section roof beam; Setting a lower flange strike line connecting the second auxiliary point C and the lower flange corner point A; The step S5 comprises: Setting a third auxiliary line parallel to the top surface of the variable-section roof beam, the third auxiliary line is located on the lower side of the variable-section roof beam, and determining the distance between the third auxiliary line and the top surface of the variable-section roof beam according to the actual large-end design height of the variable-section roof beam; Determine the intersection of the third auxiliary line and the lower flange strike line as a third auxiliary point D; A vertical line is set, which passes through the third auxiliary point D and is perpendicular to the top surface of the variable-section roof beam. The foot of the vertical line and the top surface of the variable-section roof beam is the target position of the starting control handle position.

2. The modeling method according to claim 1, characterized in that Move the initial end handle of the variable-section roof beam toward the column along the vector direction D1 to adjust the position of the end handle, the moving distance of the initial end handle is an integer multiple of the thickness of the second beam end plate, and the vector direction D1 is the extension direction of the line connecting the initial end handle and the initial start handle.

3. The modeling method according to claim 1, characterized in that The distance between the first auxiliary line and the intersection line is an integer multiple of the sum of the thickness of the first beam end plate and the thickness of the column flange reinforcement plate.

4. The modeling method according to claim 1, characterized in that The distance between the second auxiliary point C and the first auxiliary point B in the vertical direction is an integer multiple of the height of the actual large end of the variable-section roof beam.

5. The modeling method according to claim 1, characterized in that The distance between the third auxiliary line and the top surface of the variable-section roof beam is an integer multiple of the actual large-end design height of the variable-section roof beam.

6. The modeling method according to claim 1, characterized in that Step S1: Create a three-dimensional model of the variable-section roof beam and a three-dimensional model of the column according to the requirements of the engineering project design drawings.

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