Tekla platform-based modeling method for joint of variable cross-section roof beam and stand column

Abstract

The invention discloses a modeling method for the joint of a variable cross-section roof beam and a stand column based on a Tekla platform. The modeling method comprises the following steps: establishing a three-dimensional model of the variable cross-section roof beam and a three-dimensional model of the stand column; adjusting the position of an end control handle of the variable cross-section roof beam according to the second connecting node; determining the actual large end of the variable cross-section roof beam and the position of the connecting surface of the first connecting node according to the first connecting node; determining a lower flange trend line of the variable cross-section roof beam according to the adjusted position of the end control handle of the variable cross-section roof beam and the position of the connecting surface; determining a target position of a starting control handle of the variable cross-section roof beam according to the strike line of the lower flange; the initial initial control handle of the variable cross-section roof beam is adjusted to the target position of the initial control handle; and creating a cutting surface at the position of the connecting surface to complete correction of the shape of the large end of the variable-cross-section roof beam. Therefore, through the operation of the step S1 to the step S7, the heights of the actual large end and the actual small end accurately meet the requirements of an engineering project design drawing.

Description

Technical Field

[0001] The present application relates to the field of three-dimensional construction based on the Tekla platform, and in particular to a modeling method for the connection between a roof beam and a column with a variable cross-section based on the Tekla platform. Background Art

[0002] The portal frame structure is widely used in industrial and civil buildings such as industry, commerce, and cultural and entertainment public facilities due to its simple force bearing, clear force transmission path, quick component manufacturing, easy factory processing, short construction period, and low steel consumption. The roof beams of the portal steel frame are mostly in the form of variable cross-section. The cross-sectional shape of the portal steel frame is well matched with the structural internal force diagram, the force is reasonable, and it can save steel.

[0003] Taking into account the need for roof drainage, the roof beam is designed with a slope. Since the variable-section roof beam has unique operating characteristics on the Tekla platform, it is difficult for the steel structure deepening designer to control the actual large end height of the variable-section roof beam and the column connection. When the steel structure deepening designer models the connection node between the portal steel frame variable-section roof beam and the column on the Tekla platform, he usually directly sets the starting handle of the variable-section roof beam on the center line of the column, and then draws the beam-column connection node on the side of the column. In this way, when establishing the beam-column connection node, it is necessary to cut off the large end of the variable-section roof beam. This operation often results in the actual large end height of the variable-section roof beam failing to meet the design requirements. Moreover, as the cross-sectional size of the column and the cross-sectional size of the variable-section roof beam increase, this situation will become more and more prominent.

[0004] To this end, the present application provides a modeling method for the connection between a roof beam with a variable cross-section and a column based on the Tekla platform, so as to at least partially solve the above-mentioned problem. Summary of the invention

[0005] A series of simplified concepts are introduced in the Summary of the Invention section, which will be further described in detail in the Specific Embodiments section. The Summary of the Invention section of this application does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt 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 a 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 through 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 of the variable-section roof beam are both at an angle with the horizontal direction, and the modeling method includes:

[0007] Step S1, establishing a three-dimensional model of a variable-section roof beam and a three-dimensional model of a column, wherein an initial start handle of the variable-section roof beam is located at a corner of the top of the three-dimensional model of the column, an initial end handle of the variable-section roof beam is located at a second connection node between the small end of the variable-section roof beam and other steel beams, and a corner is located at one 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 trend 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 shape of the large end of the variable-section roof beam.

[0014] According to the modeling method of the present application, through the operations of step S1 to step S7, the heights of the actual large end and the actual small end both 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, and 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, and 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] A second auxiliary point C is set, and the second auxiliary point C is located directly below the first auxiliary point B. The distance between the second auxiliary point C and the first auxiliary point B along the vertical direction is determined according to 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 along 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 at the lower side of the variable-section roof beam, and the distance between the third auxiliary line and the top surface of the variable-section roof beam is determined according to the actual large end design height 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 starting 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 by referring to the specific embodiments shown in the accompanying drawings. It can be understood that these drawings only depict typical embodiments of the present application and therefore should not be considered as limiting the scope of protection thereof. The present application is described and explained with additional characteristics and details through the accompanying drawings.

[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 Based on 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 modeling method adds a model schematic diagram of a first auxiliary line through step S3;

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

[0040] Figure 6 For Figure 5 On the basis of, the modeling method adds a model schematic diagram of a third auxiliary line, a third auxiliary point D, a perpendicular line and a foot of the perpendicular 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 this, the modeling method creates a model schematic diagram of the variable-section roof beam and column after the cutting surface is created in step S7.

[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: Lower flange of roof beam 125: Web of roof beam

[0049] 126. Top surface 127. Connecting 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: The third auxiliary point D 305: The foot of the perpendicular

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

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

[0056] 405: Vertical line 901: Start 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 is obvious to those skilled in the art that the present application embodiments can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present application embodiments, some technical features well known in the art are not described.

[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 only for the purpose of illustration and are not intended to be limiting.

[0060] Herein, 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 or the like.

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

[0062] The present application provides a modeling method for the connection between a variable-section roof beam 120 and a column 110 based on a Tekla platform. In the model of the connection between the column 110 and the variable-section roof beam 120 established by the modeling method, the height dimensions of the actual large end and the actual small end of the variable-section roof beam 120 both accurately meet the design requirements.

[0063] The effect of the column 110 and the variable-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 of the roof beam, a lower flange 124 of the roof beam and a web 125 of the roof beam. The upper flange 123 of the roof beam is located above the lower flange 124 of the roof beam. The web 125 of the roof beam is located between the upper flange 123 of the roof beam and the lower flange 124 of the roof beam. The plane where the web 125 of the roof beam is located is parallel to the vertical direction. The plane where the upper flange 123 of the roof beam is located and the plane where the lower flange 124 of the roof beam is located are both perpendicular to the plane where the web 125 of the roof beam is located. The plane where the web 125 of the roof beam is located is parallel to the plane where the column web 113 is located. The plane where the upper flange 123 of the roof beam is located (parallel to the top surface 126 of the variable-section roof beam 120) and the plane where the lower flange 124 of the roof beam is located (parallel to the bottom surface of the variable-section roof beam 120) respectively form different angles with the horizontal plane. In this way, along the length direction of the variable-section roof beam 120, the height (the size of the roof beam cross-section shape along the vertical direction) of the roof beam cross-section at different positions (the cross-section is perpendicular to the plane where the web 125 of the roof beam is located and parallel to the vertical direction) is different. The end with a larger cross-section shape height is recorded as the large end 121. The end with a smaller cross-section shape height is recorded as the small end 122.

[0066] like Figure 1 As shown, the variable-section roof beam 120 is located on one side of the column 110 along 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 column flange 111 and the right column flange 112 close to the variable-section roof beam 120 is cut off to form an installation gap. In this article, a portion of the right column flange 112 is cut off to form an installation gap. It is replaced by a flange reinforcement plate 201. The thickness of the flange reinforcement plate 201 is greater than the thickness of the column flange. The plane where the flange reinforcement plate 201 is located is parallel to the vertical direction and perpendicular to the plane where the column web 113 is located. The flange reinforcement plate 201 is welded in the installation gap. The flange reinforcement plate 201 and the column web 113 are tightly attached. One end of the flange reinforcement plate 201 away from the column web 113 protrudes to the outside of the column 110. In other words, one side of the flange reinforcement plate 201 is attached to the column web 113. The other side of the flange reinforcement plate 201 protrudes to the side of the right column flange 112 away from the left column flange 111.

[0068] The actual large end of the variable-section roof beam 120 is welded with a first beam end plate 202. The plane where the first beam end plate 202 is located is parallel to the plane where the flange reinforcement plate 201 is located. The first beam end plate 202 is attached to the side of the flange reinforcement plate 201 away from the column web 113. The first beam end plate 202 is fixedly connected to the flange reinforcement plate 201 by bolts. In this way, 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 flange 123 of the roof beam is located. The plane where the second beam end plate 203 is located is perpendicular to the plane where the web 125 of the roof beam 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 other steel beams and the variable-section roof beam 120. Because other steel beams are irrelevant to the modeling method provided in this application, this application does not make additional descriptions of the modeling method for other steel beams.

[0070] It is understandable that in an embodiment not shown, the left column flange may also be provided with a mounting notch. At this time, the other side of the flange reinforcement plate protrudes to the 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, establishing 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 column 110 and the dimensions of the variable-section roof beam 120, the relative positions of the column 110 and the variable-section roof beam 120, and the connection method can be determined in advance through the design drawings of the engineering project. The method of establishing a three-dimensional model on the Tekla platform is an existing technology and will not be repeated 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 structure 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 structure component model as the starting handle 901 of the steel structure component model. The ending point of the steel structure component model will be automatically created as the ending handle 902 of the steel structure 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 cross-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 can be understood that in an embodiment not shown, the start handle and the end handle can 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 use 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 uses the position of the projection of the position of the adjusted end handle on the actual plane as the current end handle to update the three-dimensional model of the variable cross-section roof beam. In step S6 below, after the initial start handle of the variable cross-section roof beam is adjusted to the target position of the start handle. The Tekla platform uses the position of the projection of the target position of the adjusted start handle on the actual plane as the current start handle to update the three-dimensional model of the variable cross-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 foot of the perpendicular 305, the first auxiliary line 402, the second auxiliary line 403, the third auxiliary line 404 and the vertical line 405 mentioned below are all located on the center plane of the roof beam web 125.

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

[0080] 3. The start handle 901 and the end handle 902 of the steel structure model can be moved in any direction by mouse operation. Moving the handles (start handle 901 and end handle 902) will change the length direction, length, shape and other physical states of the steel structure model. The change of the start handle 901 and the end handle 902 will re-establish the steel structure model.

[0081] 4. As far as the modeling method described in this application is concerned, the characteristics of the Tekla platform are as follows: the starting 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 ending handle 902 of the variable-section roof beam 120 is bound to the position of the small end 122. In other words, the starting handle 901 of the variable-section roof beam 120 is located at the large end 121, and the ending handle 902 of the variable-section roof beam 120 is located at the small end 122. Both the starting handle 901 and the ending handle 902 are located in the plane where the top surface 126 of the variable-section roof beam 120 is located. 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), when the position of the starting control handle 901 moves, 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 cross-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 cross-section roof beam 120. The initial end handle 902 of the variable cross-section roof beam 120 is temporarily set at the position of the connection node (second connection node) between the variable cross-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 cross-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: adjusting the position of the end handle 902 according to the second connection node.

[0086] 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 on the side of the second beam end plate 203 set later and away from the column 110. To this end, the position of the end control handle 902 is adjusted according to the second connection node. After the adjustment of the end control handle 902 is completed, the Tekla platform updates the three-dimensional model of the variable-section roof beam 120, so that the small end 122 of the variable-section roof beam 120 is the actual small end, thereby meeting the requirements of the engineering 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 determined in advance by the engineering project design drawings. Thus, the actual small end of the variable cross-section roof beam 120 can meet the requirements of the engineering project 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 moving distance of the initial end handle 902 is an integer multiple of the thickness of the second beam end plate 203. Thus, the actual small end of the variable-section roof beam 120 can meet the requirements of the engineering project design drawings.

[0089] After the end handle 902 is moved, the actual small end of the variable cross-section roof beam 120 is determined in the updated three-dimensional model of the variable cross-section roof beam 120. The lower flange corner point A301 of the actual small end of the latest three-dimensional model of the variable cross-section roof beam 120 is determined. The lower flange corner point A301 is located in the plane where the bottom surface of the variable cross-section roof beam 120 is located. The lower flange corner point A301 is the lowest point of the actual small end. The actual small end can fit the second beam end plate 203 established subsequently, so as to connect other steel beams through the second beam end plate 203.

[0090] Step S3 is performed after step S2.

[0091] Step S3, determine the position of the actual large end of the variable cross-section roof beam 120 and the connection surface 127 of the first connection node according to the first connection node. The connection surface 127 is the connection surface between the first beam end plate 202 and the actual large end of the variable cross-section roof beam 120. The connection surface 127 is perpendicular to the plane where the roof beam web 125 is located.

[0092] like Figure 4As shown, on the center plane of the roof beam web 125, the intersection line 401 of the right column flange 112 and the column web 113 is translated along the flange setting direction D2 to form a first auxiliary line 402. The first auxiliary line 402 is located on the side of the intersection line 401 close to the variable-section roof beam 120. Along the flange setting direction D2, the distance between the first auxiliary line 402 and the intersection line 401 can be determined by the thickness of the flange reinforcement plate 201 and the thickness of the first beam end plate 202. The thickness of the flange reinforcement plate 201 and the thickness of the first beam end plate 202 can be determined in advance by the engineering 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, determining the lower flange direction line of the variable-section roof beam 120 according to the position of the end control handle 902 of the adjusted 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 the first auxiliary point B302.

[0098] The second auxiliary point C303 is formed by vertically translating the first auxiliary point B302 downward. In this way, 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 according to 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 size of the actual large end 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 by 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 trend line of the variable-section roof beam 120. Thus, the lower flange trend line can be accurately determined.

[0101] Furthermore, along the vertical direction, the distance from the second auxiliary point C303 to the first auxiliary point B302 is an integer multiple of the height of the actual large end of the variable-section roof beam 120. Thus, the lower 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 three-dimensional model of the column 110 and the three-dimensional model of the variable-section roof beam 120 established in step S1, the large end 121 is located at the corner of the top of the column 110. For this reason, the target position of the starting handle 901 is re-determined. In this way, the initial starting handle 901 is moved to the target position, and the Tekla platform updates the three-dimensional model of the variable-section roof beam 120, so that the large end 121 of the variable-section roof beam 120 can be the actual large end, thereby making the variable-section roof beam 120 meet the requirements of the engineering project design drawings.

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

[0106] The intersection point 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 web 125 of the roof beam, a vertical 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 vertical line 405 and the top surface 126 is the foot 305 of the vertical 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 height of the actual 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 will automatically update the three-dimensional 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, creating a cutting surface of the large end 121 of the variable-section roof beam 120 at the connection surface 127 position.

[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 web 125 of the roof beam is located), and the correction of the shape of the large end 121 of the variable-section roof beam 120 is completed to meet the requirement of creating a connection node from the actual large end of the variable-section roof beam 120 to 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 position of the starting handle 901 of the variable-section roof beam 120 is maintained at the vertical foot 305. The cutting surface can fit the first beam end plate 202 created subsequently.

[0117] The method of establishing the cutting surface of the three-dimensional model on the Tekla platform is a prior art and will not be described in detail here. In addition, in the result of creating the cutting surface of the actual large end of the variable-section roof beam 120 described in this application, the position of the start handle 901 remains unchanged (maintained at the vertical foot 305) which is a normal result of normal operation.

[0118] Through the operations of step S1 to step S7, the actual large end of the variable-section roof beam 120 is at the correct position where the variable-section roof beam 120 is connected to the first beam end plate 202, and the actual small end is at the correct position where the variable-section roof beam 120 is connected 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 engineering 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-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and illustration, and are not intended to limit the present application to the scope of the described embodiments. In addition, it can be understood by those skilled in the art that the present application is not limited to the above-mentioned embodiments, and more variations and modifications can be made according to the teachings of the present application, and these variations and modifications all fall within the scope of protection claimed by the present application. The scope of protection of the present application is defined by the attached claims and their equivalents.

[0121] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally 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 in this article may represent either a single part or a combination of multiple parts. Terms such as "installation" and "setting" and the like appearing in this article may represent either a component being directly attached to another component or a component being attached to another component through an intermediate. 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 specified.

Claims

1. A modeling method for 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 through 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 comprises: Step S1, establishing 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 small end of the variable-section roof beam and the second connection node of other steel beams, and the corner is located at one 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 control 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 the target position of the starting handle of the variable-section roof beam according to the lower flange trend line; Step S6, adjusting the initial starting handle of the variable-section roof beam to the target position of the starting handle; Step S7: 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.

2. The modeling method according to claim 1, characterized in that: 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.

3. The modeling method according to claim 2, 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.

4. The modeling method according to claim 2, characterized in that: 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 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, and 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, and the left column flange and the right column flange of the column are spaced apart along the flange setting direction.

5. The modeling method according to claim 4, 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.

6. The modeling method according to claim 4, characterized in that: 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 the first auxiliary point B; A second auxiliary point C is set, and the second auxiliary point C is located directly below the first auxiliary point B. The distance between the second auxiliary point C and the first auxiliary point B along the vertical direction is determined according to the actual height of the large end of the variable-section roof beam; A lower flange strike line connecting the second auxiliary point C and the lower flange corner point A is set.

7. The modeling method according to claim 6, 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.

8. The modeling method according to claim 6, characterized in that: The step S5 comprises: A third auxiliary line is set parallel to the top surface of the variable-section roof beam, the third auxiliary line is located at the lower side of the variable-section roof beam, and the distance between the third auxiliary line and the top surface of the variable-section roof beam is determined 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 the 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.

9. The modeling method according to claim 8, 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.

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

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