Parametric 3D modeling method of M-shaped nodes based on 3Dexperience

Abstract

The present invention discloses a parameterized three-dimensional modeling method of a spatial M-shaped node reinforcement based on a 3Dexperience platform, which belongs to the field of BIM modeling of building structures, including: creating a parameterized three-dimensional model template of arc beams and cylinders in the M-shaped node area; establishing a node skeleton line model according to the starting point coordinates of the cylinder and the arc beam; calling the template to generate a lod200 three-dimensional model of the M-shaped node; upgrading the lod200 model and adjusting the cylinder and arc beam reinforcement and end connection structural parameters to obtain a lod300 three-dimensional model of the M-shaped node; creating a longitudinal reinforcement positioning plate for the M-shaped node cylinder and arc beam; using MBD technology to perform three-dimensional annotation on the lod300 model and generate a reinforcement material table. The present invention improves the speed and accuracy of modeling reinforcement of a spatial M-shaped node; the reinforcement positioning plate can avoid rework and delay caused by the position deviation of the reinforcement, and the combined use of the model and three-dimensional annotation facilitates the understanding of complex node design and improves the efficiency of on-site construction.

Description

Technical Field

[0001] The present invention belongs to the technical field of BIM modeling of building structures, and more specifically, relates to a parameterized three-dimensional modeling method of spatial M-shaped node steel bars based on a 3Dexperience platform. Background Art

[0002] With the pursuit of complex and diverse building shapes in modern society, spatial M-shaped nodes are increasingly widely used in the construction field due to their reasonable force system and other characteristics. The spatial positioning relationship of spatial M-shaped nodes is relatively complex, and there are more beam and column components at the nodes, resulting in an exponential increase in the number of steel bars compared to general nodes. At present, on-site construction is still mainly based on two-dimensional drawings, combined with relevant standard drawings and markings in the drawings for construction.

[0003] This method may cause inaccurate spatial positioning of node beams and columns, inaccurate steel bar binding positions, etc. for complex nodes such as spatial M-shaped nodes due to misunderstanding, which will ultimately affect the progress of the project. Summary of the invention

[0004] In view of the above defects or improvement needs of the prior art, the present invention proposes a parametric three-dimensional modeling method of spatial M-shaped node steel bars based on the 3Dexperience platform to solve the above defects in the existing BIM modeling technology.

[0005] To achieve the above object, the present invention provides a parameterized three-dimensional modeling method of spatial cross-shaped node reinforcement based on a 3Dexperience platform, comprising:

[0006] (1) Create a parametric 3D model template for the arc beams and columns in the M-shaped node area;

[0007] (2) Establish a cross-shaped node skeleton line model based on the starting point coordinates of the node cylinder and the arc beam;

[0008] (3) Calling the created parameterized 3D model template to generate a lod200 level 3D model of a cross-shaped node;

[0009] (4) Upgrading the LOD200 level three-dimensional model of the cross-shaped node and adjusting the structural parameters of the cylindrical and curved beam reinforcement and the end connection to obtain the LOD300 level reinforcement three-dimensional model of the cross-shaped node;

[0010] (5) Create longitudinal reinforcement positioning plates for M-shaped node columns and curved beams;

[0011] (6) Use MBD technology to perform 3D annotation on the LOD300 level 3D model and generate a steel bar material table as a basis for on-site construction.

[0012] In some optional embodiments, the parametric three-dimensional model template includes a concrete component template and a component reinforcement template.

[0013] In some optional embodiments, step (4) comprises:

[0014] (4.1) Batch improve the lod level of arc beams and columns in the node area;

[0015] (4.2) According to the steel reinforcement area calculated by the structural design software, the steel reinforcement parameters are modified to obtain a preliminary steel reinforcement three-dimensional model of the curved beam;

[0016] (4.3) According to the steel reinforcement area calculated by the structural design software, the steel reinforcement parameters of the main columns and inclined columns are modified respectively to obtain the preliminary three-dimensional steel reinforcement models of all main columns and inclined columns;

[0017] (4.4) Focus on the reinforcement of the lower main column, analyze the interference and collision of the reinforcement of the beam, inclined column and main column, and adjust the adjacent reinforcement positioning points to avoid interference for the beam reinforcement and inclined column reinforcement that collide with the main column;

[0018] (4.5) Adjust the longitudinal reinforcement positioning points of the upper columns including the main columns and inclined columns to ensure mechanical connection with the steel bars of the lower columns, and finally complete the three-dimensional modeling of the spatial M-shaped node steel bars.

[0019] In some optional embodiments, step (4.2) comprises:

[0020] (4.2.1) Modify the number and specifications of the upper and lower longitudinal reinforcements of the beam;

[0021] (4.2.2) Measure the distance from the beam end to the outside of the end column and the center line of the end column;

[0022] (4.2.3) According to the distance from the beam end to the outer side of the end column and the center line of the end column, modify the straight anchor length parameter values ​​of the upper longitudinal reinforcement and the lower longitudinal reinforcement respectively;

[0023] (4.2.4) Adjust the anchor length of the upper and lower longitudinal reinforcement ends according to the reinforcement specifications;

[0024] (4.2.5) Copy the existing stirrups and create the stirrups for the second leg of the curved beam by replacing the corresponding main reinforcement.

[0025] In some optional embodiments, step (4.5) includes:

[0026] (4.5.1) Extract the upper end positioning point of the starting longitudinal reinforcement of the lower column and replace this point with the lower end positioning point of the starting reinforcement of the upper column;

[0027] (4.5.2) Check the angles of each other steel bar positioning point and the starting steel bar positioning point in the lower column, update this angle value to the corresponding angle value of the steel bar in the upper column, and complete the three-dimensional modeling of the spatial M-shaped node steel bar.

[0028] Among them, in step (4), a progressive modeling method is used. After the lod200 level model is created, a preliminary three-dimensional model of the M-shaped node reinforcement can be generated in batches with one click; based on the preliminary node reinforcement three-dimensional model, only parameters need to be modified or a small amount of modeling work needs to be done to obtain an accurate spatial M-shaped node reinforcement three-dimensional model.

[0029] In some optional implementation schemes, in step (5), the steel bar size positioning plate is parametrically modeled, and the cross-sectional size of the positioning plate and the size of the main reinforcement through-hole can be adjusted according to the actual project to accurately position the component reinforcement and prevent the position deviation of the reinforcement. (Note: The steel bar positioning plate needs to be removed before pouring concrete)

[0030] In some optional implementation schemes, in step (6), the skeleton lines, cross-sections and steel bar information of the parameterized spatial M-shaped node steel bar nodes are read, and the spatial positioning of beams and columns, the cross-sections of beams and columns, and the three-dimensional annotation of steel bars can be performed in the lod300 level three-dimensional model, and a steel bar material table can be generated as a basis for on-site construction.

[0031] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0032] The present invention quickly establishes a node steel bar three-dimensional model by creating node beam-column skeleton lines and beam-column templates, and has a good visualization effect, improves modeling speed and accuracy, and provides an effective modeling method for creating spatial M-shaped node steel bars. The steel bar positioning plate in the parametric three-dimensional model created by the present invention can guide the precise positioning of complex node steel bars during construction, thereby realizing the precise positioning of spatial M-shaped node steel bars, and is very convenient for reading and modifying parameters such as steel bar specifications, quantity, and spacing; through an accurate three-dimensional model, combined with three-dimensional annotation, the node structure can be quickly understood, rework and delays caused by errors in understanding the drawings can be avoided, and on-site construction efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a flow chart of a method provided by an embodiment of the present invention;

[0034] Figure 2 An embodiment of the present invention provides a lod200 level 3D model template (similar to a Revit family library) of a curved beam and a column created in a 3DE platform;

[0035] Figure 3An embodiment of the present invention provides a lod300 level 3D model template (similar to a Revit family library) of a curved beam and a column created in a 3DE platform;

[0036] Figure 4 It is a spatial M-shaped node beam-column skeleton line provided by an embodiment of the present invention;

[0037] Figure 5 A spatial cross-shaped node lod200 three-dimensional model provided by an embodiment of the present invention;

[0038] Figure 6 It is a schematic diagram of an interface of a component provided by an embodiment of the present invention, which is upgraded from lod200 to lod300;

[0039] Figure 7 A three-dimensional model of a spatial M-shaped node lod300 steel bar provided in an embodiment of the present invention;

[0040] Figure 8 An embodiment of the present invention provides an arrangement of arc beams and cylindrical steel bar positioning plates in a spatial M-shaped node area;

[0041] Fig. 9 A three-dimensional model of a curved beam and cylindrical steel bar positioning plate provided in an embodiment of the present invention;

[0042] Fig.10 A spatial cross-shaped node three-dimensional annotation provided by an embodiment of the present invention;

[0043] Fig.11 A steel bar material table derived from a 3DE platform is provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0045] The method of the present invention uses the modeling module of the 3Dexperience platform to compile the process of parametric three-dimensional modeling of spatial M-shaped node reinforcement, and quickly establishes the node reinforcement three-dimensional model by creating the node beam-column skeleton line and the beam-column template (the anchorage and mechanical connection of the reinforcement have been considered in the model), and performs three-dimensional annotation and reinforcement material table statistics. Through the accurate three-dimensional model of the spatial M-shaped node reinforcement, combined with three-dimensional annotation, the node structure can be quickly understood, the node reinforcement arrangement can be accurately located, and the rework and delay caused by the deviation of the reinforcement position can be avoided, thereby improving the efficiency of on-site construction.

[0046] like Figure 1 As shown, the present invention provides a parameterized three-dimensional modeling method of spatial cross-shaped node reinforcement based on the 3Dexperience platform, which mainly includes the following steps:

[0047] S1: Create a parametric 3D model template (similar to Revit family library) of arc beams and columns in the M-shaped node area, which can specifically include the following two types of templates:

[0048] S1.1: Concrete component template, template parameters include component cross-sectional dimensions, component positioning offset values, component material specifications, template and parameter initial value reference Figure 2 As shown;

[0049] S1.2: Component reinforcement template. In addition to the parameters listed in S1.1, the template parameters also include reinforcement parameters, including reinforcement grade, reinforcement cover thickness, longitudinal reinforcement / hoop reinforcement specifications, number of reinforcements, spacing between reinforcement reinforcement densification areas or non-densification areas, etc. The template and parameter initial values ​​can be referred to Figure 3 shown.

[0050] in, Figure 2 and Figure 3 The initial values ​​of the parameters in are indicative and can also be other values.

[0051] S2: Establish the node skeleton line model according to the starting point coordinates of the node cylinder and beam. The cylinder skeleton line is the centerline of the centerline of the cylinder and the beam skeleton line is the centerline of the top elevation beam. Figure 4 As shown;

[0052] S3: Call the template created in step S1 to modify the cross-sectional dimensions of the curved beam and the column (e.g., the cross-sectional dimensions of the curved beam are 800×1100, and the cross-sectional dimensions of the main column are ), generate a lod200 level 3D model of a cross-shaped node, such as Figure 5 As shown;

[0053] S4: Figure 5 The model in the LOD level is upgraded, and the reinforcement parameters are adjusted to obtain Figure 7 The three-dimensional model of the M-shaped node reinforcement (LOD300 level) is shown, and the specific process is as follows;

[0054] S4.1: Batch improve the lod level of curved beams and columns in the node area, improve the interface such as Figure 6 As shown;

[0055] S4.2: According to the steel reinforcement area calculated by the structural design software, modify the steel reinforcement parameters to obtain a preliminary steel reinforcement 3D model of the curved beam. The specific steps are as follows:

[0056] S4.2.1: Modify the number of upper longitudinal reinforcement and lower longitudinal reinforcement of the beam to 8, and the steel bar specification is C20;

[0057] S4.2.2: Measure the distance from the beam end to the outside of the end column (end column model not shown in the figure) and the centerline of the end column;

[0058] S4.2.3: According to the measured value of S4.2.2, modify the straight anchor length parameter value of the upper longitudinal reinforcement, such as modifying the straight anchor length of the first upper longitudinal reinforcement to 250mm, and modify other reinforcements in turn to ensure that the upper longitudinal reinforcement is directly anchored to the inner side of the reinforcement outside the end column and is not less than 0.4Labe; modify the straight anchor length parameter value of the lower longitudinal reinforcement in turn to ensure that the straight anchor length of the reinforcement meets the requirements of the specification and atlas;

[0059] S4.2.4: The bending anchor length of the upper longitudinal reinforcement and the lower longitudinal reinforcement is 15d, which can be automatically adjusted as the reinforcement specifications are changed;

[0060] S4.2.5: Copy the existing stirrups and quickly create the stirrups for the second leg of the curved beam by replacing the corresponding main reinforcement.

[0061] S4.3: According to the column reinforcement area calculated by the structural design software, the number of longitudinal bars of main column 1 is changed to 16, the longitudinal bar specification is C25, the mechanical connection length of the reserved steel bars at the upper end of main column 1 can be automatically adjusted with the longitudinal bar specification, and the existing stirrups are copied and replaced with the corresponding longitudinal bars to quickly modify all stirrups of the column; refer to the above steps to modify the longitudinal and stirrup arrangements of main columns 2 to oblique columns 4 in turn, and obtain the preliminary steel bar 3D model of all columns;

[0062] S4.4: Focusing on the reinforcement of main column 1, analyze the interference and collision of the reinforcement of beams, inclined columns and main columns. For the reinforcement of beams and inclined columns that collide with the main columns, adjust the positioning points of adjacent reinforcements to avoid interference.

[0063] S4.5: Adjust the longitudinal reinforcement positioning points of the upper columns (main column 2, inclined column 3 and inclined column 4) in sequence to ensure mechanical connection with the steel bars of the lower columns. The specific implementation method is as follows:

[0064] S4.5.1: Extract the upper end positioning point of the starting longitudinal reinforcement of the lower column, such as main column 1, and replace this point with the lower end positioning point of the starting reinforcement of the upper column, main column 2;

[0065] S4.5.2: Check the angles of each other steel bar positioning point and the starting steel bar positioning point of main column 1, and update this angle value to the corresponding angle value of the steel bar of main column 2;

[0066] S4.5.3: Adjust the steel bar positioning points of other upper columns in sequence according to S4.5.1 and S4.5.2 to achieve mechanical connection with the steel bars of the lower columns, and finally complete the three-dimensional modeling of the spatial M-shaped node steel bars.

[0067] S5: Create two positioning plates at about 1 / 3 of the ends of the curved beam and column to fix the longitudinal reinforcement. See the schematic diagram of the positioning plates. Figure 8 ;

[0068] The positioning plate is parametrically modeled, and its cross-sectional dimensions are the same as those of the arc-shaped beams or columns in the node area. It is recommended that the diameter of the circular hole through which the longitudinal reinforcement passes is equal to the corresponding nominal diameter of the steel bar plus 4mm. For example, the diameter of the longitudinal reinforcement hole through which the positioning plate with a longitudinal reinforcement specification of C25 is 29mm, which can be adjusted according to actual conditions. Fig. 9 As shown. (Note: This steel bar positioning plate needs to be removed before pouring concrete).

[0069] S6: Use the model based definition (MBD) technology to perform three-dimensional annotation on the three-dimensional steel bar model generated in step S4 (such as Fig.10 ), and generate a reinforcement material table (as shown Fig.11 as shown) as the basis for on-site construction.

[0070] It should be pointed out that, according to the needs of implementation, the various steps / components described in this application can be split into more steps / components, and two or more steps / components or partial operations of steps / components can be combined into new steps / components to achieve the purpose of the present invention.

[0071] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A parameterized three-dimensional modeling method of spatial cross-shaped node reinforcement based on the 3Dexperience platform, characterized in that: include: (1) Create a parametric 3D model template for the arc beams and columns in the M-shaped node area; (2) Establish a cross-shaped node skeleton line model based on the starting point coordinates of the node cylinder and the arc beam; (3) Based on the M-shaped node skeleton line model, the created parameterized 3D model template is called to generate a lod200 level 3D model of the M-shaped node; (4) Upgrading the LOD200 level three-dimensional model of the cross-shaped node and adjusting the structural parameters of the cylindrical and curved beam reinforcement and the end connection to obtain the LOD300 level reinforcement three-dimensional model of the cross-shaped node; (5) Create longitudinal reinforcement positioning plates for M-shaped node columns and curved beams to fix the longitudinal reinforcement; (6) Use MBD technology to perform 3D annotation on the LOD300 grade steel bar 3D model and generate a steel bar material table as a basis for on-site construction; Step (4) comprises: (4.1) Batch improve the lod level of arc beams and columns in the node area; (4.2) According to the steel reinforcement area calculated by the structural design software, the steel reinforcement parameters are modified to obtain a preliminary steel reinforcement three-dimensional model of the curved beam; (4.3) According to the steel reinforcement area calculated by the structural design software, the steel reinforcement parameters of the main columns and inclined columns are modified respectively to obtain the preliminary three-dimensional steel reinforcement models of all main columns and inclined columns; (4.4) Focus on the reinforcement of the lower main column, analyze the interference and collision of the reinforcement of the beam, inclined column and main column, and adjust the adjacent reinforcement positioning points to avoid interference for the beam reinforcement and inclined column reinforcement that collide with the main column; (4.5) Adjust the longitudinal reinforcement positioning points of the upper columns including the main columns and inclined columns to ensure mechanical connection with the steel bars of the lower columns, and finally complete the three-dimensional modeling of the spatial M-shaped node steel bars.

2. The method according to claim 1, characterized in that The parametric three-dimensional model template includes a concrete component template and a component reinforcement template.

3. The method according to claim 2, characterized in that Step (4.2) includes: (4.2.1) Modify the number and specifications of the upper and lower longitudinal reinforcements of the beam; (4.2.2) Measure the distance from the beam end to the outside of the end column and the center line of the end column; (4.2.3) According to the distance from the beam end to the outer side of the end column and the center line of the end column, modify the straight anchor length parameter values ​​of the upper longitudinal reinforcement and the lower longitudinal reinforcement respectively; (4.2.4) Adjust the anchor length of the upper and lower longitudinal reinforcement ends according to the reinforcement specifications; (4.2.5) Copy the existing stirrups and create the stirrups for the second leg of the curved beam by replacing the corresponding main reinforcement.

4. The method according to claim 3, characterized in that Step (4.5) includes: (4.5.1) Extract the upper end positioning point of the starting longitudinal reinforcement of the lower column and replace this point with the lower end positioning point of the starting reinforcement of the upper column; (4.5.2) Check the angles of each other steel bar positioning point and the starting steel bar positioning point in the lower column, update this angle value to the corresponding angle value of the steel bar in the upper column, and complete the three-dimensional modeling of the spatial M-shaped node steel bar.

5. The method according to claim 1, characterized in that: In step (5), the longitudinal reinforcement positioning plate is parametrically modeled, and the relevant parameters are modified according to the actual project to adjust the cross-sectional size of the positioning plate and the size of the longitudinal reinforcement penetration hole, so as to accurately position the longitudinal reinforcement and prevent the reinforcement position deviation.

6. The method according to claim 1, characterized in that In step (6), the skeleton line, cross section and steel bar information of the parameterized spatial M-shaped node steel bar node are read, the beam-column spatial positioning, beam-column cross section and steel bar three-dimensional annotation are performed in the lod300 level steel bar three-dimensional model, and a steel bar material table is generated as a basis for on-site construction.

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