Modeling method for hyperboloid concrete shell structure construction formwork

Abstract

The application provides a modeling method for a hyperboloid concrete shell structure construction formwork, which is characterized in that: each elevation plane is intersected with a space formwork erection range body V to obtain an elevation plane with a curved surface contour as a side; based on each elevation plane, an upper unit block V1 of a bent frame is obtained; according to the projection plane of the lower layer height and the curved surface Surf on the erection starting plane of the bent frame, a lower unit block V2 of the bent frame is generated; the upper unit block V1 of the bent frame and the lower unit block V2 of the bent frame are combined to obtain a whole curved surface lower bent frame erection range V3; and finally, a bent frame erection simplified model composed of geometric parameter blocks is obtained according to the whole curved surface lower bent frame erection range V3, so that the standardization, automatic design and modeling of the template bent frame erection of the hyperboloid thin shell concrete structure can be realized, the method is simple and easy to use, and the template bent frame and the modeling can be rapidly designed according to different curved surface structures.

Description

TECHNICAL FIELD

[0001] The application relates to a modeling method for a hyperboloidal concrete shell structure construction formwork. BACKGROUND

[0002] Building information modeling (BIM) is a new tool for architecture, engineering and civil engineering. Compared with the traditional CAD two-dimensional drawing design method, BIM assisted construction can greatly reduce various errors generated by design team members in the initial construction design of a hyperboloidal thin shell system, and can also reduce errors made by subsequent construction manufacturers. Therefore, the construction time required can be reduced, and the engineering cost can be reduced. At present, in the field of reinforced concrete structure construction of buildings, BIM design technology has been widely applied, and has been increasingly widely penetrated into various fields of buildings.

[0003] In the design of a more complex building component, such as a building concrete pouring formwork, a scaffold system and a building curtain wall, although there are some attempts of BIM design at present, the actual application is still relatively small. One of the main reasons is that for a complex building component, modeling is difficult, the cost of BIM modeling design is high, and the efficiency is low, and it is difficult to meet the needs of engineering.

[0004] At present, the conventional BIM model design method is to first establish a building component model library, then according to the project requirements, various building component models are established and placed in the design position. For a conventional building beam column model, since the structure is relatively simple, the method is efficient, but for a complex building component, it is very difficult to establish a component library, and it is often not easy to place in the design position, which greatly limits the application of BIM design in these fields. SUMMARY

[0005] The application aims to provide a modeling method for a hyperboloidal concrete shell structure construction formwork.

[0006] To solve the above problems, the application provides a modeling method for a hyperboloidal concrete shell structure construction formwork, which comprises the following steps:

[0007] loading a thin shell model in a Dynamo platform, and extracting a thin shell curved surface Surf of the hyperboloidal concrete shell structure;

[0008] generating a reference plane Plane.TOP located above the thin shell curved surface Surf and a reference plane Plane.Bottom located below the thin shell curved surface Surf; and obtaining the highest vertex P.Top and the lowest point P.Bottom coordinates of the thin shell curved surface Surf based on the reference plane Plane.TOP and the reference plane Plane.Bottom;

[0009] According to the highest vertex P. Top and the lowest point P. Bottom, the elevation of the thin shell surface Surf is obtained, and the elevation and the corresponding elevation plane Plane{H_1, H_2, ……H_n} are segmented according to the maximum height H satisfied by the bearing capacity of the keel as the height difference, so as to establish the elevation and the corresponding elevation plane Plane{H_1, H_2, ……H_n};

[0010] The projection plane PlaneXY of the thin shell surface Surf projected to the XY plane is obtained, and the thin shell surface Surf and its projection plane PlaneXY are fused to generate a geometric body, so as to obtain the erection range body V of the space frame;

[0011] Each elevation plane Plane(H_1, H_2, ……H_n) is intersected with the erection range body V of the space frame, so as to obtain the contour plane Plane{〖CL〗_1, 〖CL〗_2……〖CL〗_n} with the curved contour line as the edge;

[0012] Based on each contour plane Plane{〖CL〗_1, 〖CL〗_2……〖CL〗_n}, the upper unit block V1 of the bent frame is obtained;

[0013] According to the lower layer height and the projection plane of the surface Surf on the starting plane of the bent frame erection, the lower unit block V2 of the bent frame is generated, wherein the lower layer height = the coordinate height of the lowest point P. Bottom - the starting height of the bent frame erection;

[0014] The upper unit block V1 of the bent frame and the lower unit block V2 of the bent frame are combined to obtain the overall curved surface lower bent frame erection range V3;

[0015] According to the overall curved surface lower bent frame erection range V3, the bent frame erection simplified model composed of geometric parameter blocks is finally obtained.

[0016] Further, in the above method, the thin shell model is loaded in the Dynamo platform, and the thin shell surface Surf of the hyperbolic surface concrete shell structure is extracted, including:

[0017] The thin shell model is loaded in the Dynamo platform, and the thin shell surface Surf of the hyperbolic surface concrete shell structure is extracted by selecting the Element. Geometry node.

[0018] Further, in the above method, the reference plane Plane. TOP located above the thin shell surface Surf and the reference plane Plane. Bottom below the thin shell surface Surf are generated; based on the reference plane Plane. TOP and the reference plane Plane. Bottom, the highest vertex P. Top and the lowest point P. Bottom coordinates of the thin shell surface Surf are obtained, including:

[0019] A ReferncePlane.ByLine node is selected to generate a reference plane Plane.TOP above the thin shell surface Surf and a reference plane Plane.Bottom below the thin shell surface Surf; based on the reference plane Plane.TOP and the reference plane Plane.Bottom, and a Geometry.ClosestPointTo is selected to obtain the highest vertex P.Top and the lowest point P.Bottom coordinates of the thin shell surface Surf.

[0020] Further, in the above method, the thin shell surface Surf is fused with the projection plane PlaneXY to generate a geometry, so as to obtain the erection range body V of the space frame, including:

[0021] A Solid.ByProjectSurfaceZAxis node is selected to fuse the thin shell surface Surf with the projection plane PlaneXY to generate a geometry, so as to obtain the erection range body V of the space frame.

[0022] Further, in the above method, each elevation plane Plane(H_1, H_2, ……H_n) is intersected with the erection range body V of the space frame, so as to obtain the contour plane Plane{〖CL〗_1, 〖CL〗_2……〖CL〗_n} with the curved contour line as the edge, including:

[0023] A Geometry.Intersect node is selected to intersect each elevation plane Plane(H_1, H_2, ……H_n) with the erection range body V of the space frame, so as to obtain the contour plane Plane{〖CL〗_1, 〖CL〗_2……〖CL〗_n} with the curved contour line as the edge.

[0024] Further, in the above method, based on each contour plane Plane{〖CL〗_1, 〖CL〗_2……〖CL〗_n}, the upper unit block V1 of the bent frame is obtained, including:

[0025] A Surface.Thicken node of each contour plane Plane{〖CL〗_1, 〖CL〗_2……〖CL〗_n} is selected, the maximum height H of the keel is selected as the thickness parameter, and a body block is generated along the negative direction of the Z axis; based on the body block, the area of the bent frame that needs to be erected in the irregular space below the thin shell surface Surf is obtained, so as to obtain the upper unit block V1 of the bent frame.

[0026] Further, in the above method, the upper unit block V1 of the bent frame and the lower unit block V2 of the bent frame are combined, so as to obtain the overall curved lower bent frame erection range V3, including:

[0027] The Solid.ByUnion is selected, the upper unit block V1 of the combination bent frame and the lower unit block V2 of the bent frame are combined, so as to obtain the overall curved lower bent frame erection range V3.

[0028] Further, in the above method, according to the overall curved lower bent frame erection range V3, a simplified model of bent frame erection composed of geometric parameter blocks is finally obtained, including:

[0029] The bent frame erection parameters are determined according to the thin-shell concrete load and the construction load calculation, the body block is split into geometric parameter blocks of the formwork by using the Geometry.Split node according to the overall curved lower bent frame erection range V3, the bent frame erection parameters, the horizontal distance a, the longitudinal distance b and the step distance h, so as to finally obtain the simplified model of bent frame erection composed of geometric parameter blocks.

[0030] Further, in the above method, the simplified model of bent frame erection includes the point position and length of each rod of the bent frame.

[0031] Compared with the prior art, the application extracts a thin-shell curved surface Surf of a double-curved thin-shell concrete structure by loading a thin-shell model in a Dynamo platform; generates a reference plane Plane.TOP above the thin-shell curved surface Surf and a reference plane Plane.Bottom below the thin-shell curved surface Surf; obtains the highest vertex P.Top and the lowest point P.Bottom coordinates of the thin-shell curved surface Surf based on the reference plane Plane.TOP and the reference plane Plane.Bottom; obtains the elevation of the thin-shell curved surface Surf according to the highest vertex P.Top and the lowest point P.Bottom, segments the elevation according to the maximum height H that satisfies the bearing capacity of a keel as a height difference, to establish the elevation and the corresponding elevation planes Plane{H_1, H_2, ……H_n}; fuses the thin-shell curved surface Surf and its projection plane PlaneXY to generate a geometric body, to obtain a space scaffold erection range body V; performs intersection calculation on each elevation plane Plane(H_1, H_2, ……H_n) and the space scaffold erection range body V, to obtain contour planes Plane{〖CL〗_1, 〖CL〗_2……〖CL〗_n} with curved surface contour lines as edges; obtains a bent frame upper unit block V1 based on each contour plane Plane{〖CL〗_1, 〖CL〗_2……〖CL〗_n}; generates a bent frame lower unit block V2 according to a lower layer height and a projection plane of the curved surface Surf on a bent frame erection starting plane, wherein the lower layer height = the lowest point P.Bottom coordinate height - the bent frame erection starting height; combines the bent frame upper unit block V1 and the bent frame lower unit block V2, to obtain an overall curved surface lower bent frame erection range V3; finally obtains a bent frame erection simplified model composed of geometric parameter blocks according to the overall curved surface lower bent frame erection range V3, which can realize standardized, automatic design and modeling of a double-curved thin-shell concrete structure formwork bent frame, is simple and easy to use, and can quickly design a formwork bent frame and model according to different curved surface structures. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a flow chart of a double-curved thin-shell concrete structure construction scaffold modeling method of an embodiment of the application

[0033] Figure 2 is a schematic diagram of extracting a curved surface contour line of an embodiment of the application;

[0034] Figure 3 is a schematic diagram of generating an elevation plane, i.e., a bent frame erection platform of an embodiment of the application;

[0035] Figure 4 is a front view schematic diagram of an embodiment of the application;

[0036] Figure 5Figure 1 is a schematic diagram of a combined shelf unit block of an embodiment of the present application. DETAILED DESCRIPTION

[0037] In order to make the above objectives, features and advantages of the present application more apparent, further detailed description of the present application will be given below with reference to the accompanying drawings and specific embodiments.

[0038] As shown in Figure 1 The present application provides a modeling method for a hyperboloid concrete shell structure construction formwork, comprising the following steps:

[0039] Step S1, loading a thin shell model in a Dynamo platform, and extracting a thin shell curved surface Surf of the hyperboloid concrete shell structure;

[0040] Preferably, the thin shell model is loaded in the Dynamo platform, and the Element.Geometry node is selected to extract the thin shell curved surface Surf of the hyperboloid concrete shell structure;

[0041] Step S2, generating a reference plane Plane.TOP above the thin shell curved surface Surf and a reference plane Plane.Bottom below the thin shell curved surface Surf; and obtaining the highest vertex P.Top and the lowest point P.Bottom coordinates of the thin shell curved surface Surf based on the reference plane Plane.TOP and the reference plane Plane.Bottom;

[0042] Preferably, the ReferncePlane.ByLine node is selected to generate the reference plane Plane.TOP above the thin shell curved surface Surf and the reference plane Plane.Bottom below the thin shell curved surface Surf; and the Geometry.ClosestPointTo is selected to obtain the highest vertex P.Top and the lowest point P.Bottom coordinates of the thin shell curved surface Surf based on the reference plane Plane.TOP and the reference plane Plane.Bottom;

[0043] Step S3, obtaining the elevation of the thin shell curved surface Surf according to the highest vertex P.Top and the lowest point P.Bottom, and segmenting the elevation according to the maximum height H of the bearing capacity of the keel to meet the height difference, so as to establish the elevation and the corresponding elevation plane Plane{H_1, H_2, ……H_n};

[0044] Step S4, obtaining the projection plane PlaneXY of the thin shell curved surface Surf projected to the XY plane, and fusing the thin shell curved surface Surf and the projection plane PlaneXY to generate a geometric body, so as to obtain the erection range body V of the space formwork;

[0045] Preferably, the Solid.ByProjectSurfaceZAxis node is selected to fuse the thin-shell surface Surf and its projection plane PlaneXY to generate a geometry, so as to obtain the erection range body V of the space formwork;

[0046] In step S5, each elevation plane Plane(H_1, H_2, ……H_n) is intersected with the erection range body V of the space formwork, so as to obtain the contour plane Plane{〖CL〗_1, 〖CL〗_2……〖CL〗_n} with the contour curve of the surface as a side;

[0047] Preferably, the Geometry.Intersect node is selected to intersect each elevation plane Plane(H_1, H_2, ……H_n) with the erection range body V of the space formwork, so as to obtain the contour plane Plane{〖CL〗_1, 〖CL〗_2……〖CL〗_n} with the contour curve of the surface as a side;

[0048] Here, as shown in FIG. 6, the elevation of each point of the hyperboloid can be extracted to extract the contour curve on the hyperboloid according to the keel processing height parameter, and the contour plane Plane{〖CL〗_1, 〖CL〗_2……〖CL〗_n} obtained is as shown in FIG. 7; Figure 2 Figure 3

[0049] In step S6, based on each contour plane Plane{〖CL〗_1, 〖CL〗_2……〖CL〗_n}, the upper unit block V1 of the bent frame is obtained;

[0050] Preferably, the Surface.Thicken node of each contour plane Plane{〖CL〗_1, 〖CL〗_2……〖CL〗_n} is selected, the maximum height H of the keel is selected as the thickness parameter, and the body block is generated along the negative direction of the Z axis on one side; based on the body block, the area of the bent frame which needs to be erected in the irregular space below the thin-shell surface Surf is obtained, so as to obtain the upper unit block V1 of the bent frame;

[0051] Here, as shown in FIG. 8, the contour curve generated plane can be generated in sequence along the negative direction of the Z axis to obtain the upper unit block V1 of the bent frame which needs to be erected below the thin-shell surface; Figure 4

[0052] In step S7, the lower unit block V2 of the bent frame is generated according to the projection plane of the lower height and the surface Surf on the erection starting plane of the bent frame, wherein the lower height = the coordinate height of the lowest point P.Bottom-the erection starting height of the bent frame;

[0053] Here, as shown in FIG. 9, the contour curve generated plane can be generated in sequence along the negative direction of the Z axis to obtain the upper unit block V1 of the bent frame which needs to be erected below the thin-shell surface; Figure 4 ​​​As shown, the projection plane of the hyperboloid at the starting plane of the bent frame erection can be extracted, the height is the lowest elevation of the thin-shell curved surface, and the bent frame lower unit block V2 of the erection is obtained according to the projection plane and the lowest elevation;

[0054] Step S8, the bent frame upper unit block V1 and the bent frame lower unit block V2 are combined to obtain the overall curved surface lower bent frame erection range V3.

[0055] Preferably, the bent frame upper unit block V1 and the bent frame lower unit block V2 are combined to obtain the overall curved surface lower bent frame erection range V3 by selecting Solid.ByUnion.

[0056] Step S9, according to the overall curved surface lower bent frame erection range V3, the bent frame erection simplified model composed of geometric parameter blocks as shown in the figure is finally obtained. Figure 5

[0057] Preferably, the bent frame erection parameters are determined according to the thin-shell concrete load and the construction load calculation; according to the overall curved surface lower bent frame erection range V3, the bent frame erection parameters, the horizontal distance a, the longitudinal distance b and the step distance h, the body block is split into geometric parameter blocks of the formwork by selecting the Geometry.Split node, so as to finally obtain the bent frame erection simplified model composed of geometric parameter blocks as shown in the figure. Figure 5

[0058] Preferably, the bent frame erection simplified model comprises point positions and lengths of each rod of the bent frame.

[0059] Here, the bent frame upper unit block V1 and the bent frame lower unit block V2 can be combined, and the bent frame system erection parameters calculated according to the design are split (the parameters are a solid geometric parameter block combination of calculated lengths, and the parameter blocks are mainly cuboids and triangular prisms), so as to obtain the spatial simplified model of the bent frame system.

[0060] The cast-in-place hyperboloid thin-shell concrete structure needs to erect a temporary formwork bent frame system with a high standard and accurate formwork during construction. Before the formwork is processed, the bent frame system needs to be designed to meet the construction load, the convenience of on-site erection and the processing of the formwork.

[0061] The present application can realize the standardization, automatic design and modeling of the formwork bent frame erection of the hyperboloid thin-shell concrete structure, is simple and easy to use, and can quickly design the formwork bent frame and modeling according to different curved surface structures.

[0062] The present application has the following advantages:

[0063] 1. The simplified model of the bent frame system contains the point positions and lengths of each rod of the bent frame, and can quickly extract parameters to provide a material list for on-site construction.

[0064] ​​2. The simplified model can be converted from the simplified model to the high-precision BIM model through model replacement parameter conversion, meeting different construction requirements, such as lightweight model, BIM visualized presentation, high-precision three-dimensional model, etc.

[0065] 3. The problem that the bent frame model is too large to be opened and analyzed in construction deepening design is solved.

[0066] 4. The construction efficiency is effectively accelerated, the on-site construction operation is facilitated, and the construction quality is improved.

[0067] 5. The amount of material for custom processing of wood keel is reduced by increasing the erection area of the bent frame, and the economic benefit is improved.

[0068] Each embodiment in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between each embodiment can be referred to each other.

[0069] The skilled person can further realize that the units and algorithm steps of each example described in combination with the embodiments disclosed in the present text can be realized in electronic hardware, computer software or combination of both. In order to clearly show the interchangeability of hardware and software, the composition and steps of each example have been described in the above description. Whether the functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. The skilled person can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0070] Obviously, those skilled in the art can make various modifications and variations to the application without departing from the spirit and scope of the application. Therefore, if these modifications and variations of the application fall within the scope of the claims of the application and their equivalents, the application also intends to include these modifications and variations.

Claims

1. A method for modeling a construction formwork for a hyperbolic concrete shell structure, characterized in that: include: Load the thin shell model in the Dynamo platform and extract the thin shell surface Surf of the hyperbolic concrete shell structure; Generate a reference plane Plane.TOP located above the thin shell surface Surf and a reference plane Plane.Bottom located below the thin shell surface Surf; based on the reference plane Plane.TOP and the reference plane Plane.Bottom, obtain the coordinates of the highest vertex P.Top and the lowest point P.Bottom of the thin shell surface Surf; Based on the highest vertex P.Top and the lowest point P.Bottom, the elevation of the thin shell surface Surf is obtained, and the elevation and corresponding elevation planes Plane{H_1, H_2, ... H_n} are established by segmenting the surface according to the maximum height H at which the keel's bearing capacity is satisfied. Obtain the projection surface PlaneXY of the thin shell surface Surf onto the XY plane, fuse the thin shell surface Surf with its projection surface PlaneXY to generate a geometric body, so as to obtain the erection range body V of the spatial formwork; Calculate the intersection of each elevation plane Plane (H_1, H_2, ... H_n) with the erection range body V of the spatial formwork, thereby obtaining the contour plane Plane {〖CL〗_1,〖CL〗_2……〖CL〗_n} with the contour curve of the surface as the edge; Based on the planes {〖CL〗_1, 〖CL〗_2...〖CL〗_n} of equal height, the upper unit block V1 of the rack is obtained; Generate the lower unit block V2 of the bent according to the lower layer height and the projection plane of the curved surface Surf on the starting plane of the bent erection, where the lower layer height = the coordinate height of the lowest point P.Bottom - the starting height of the bent erection; Combine the upper unit block V1 of the bent and the lower unit block V2 of the bent to obtain the erection range V3 of the bent under the overall curved surface; According to the bent erection range V3 under the overall curved surface, a simplified bent erection model consisting of geometric parameter blocks is finally obtained.

2. The method for modeling a hyperbolic concrete shell structure construction formwork according to claim 1, wherein: Load the thin shell model in the Dynamo platform and extract the thin shell surface Surf of the hyperbolic concrete shell structure, including: Load the thin shell model in the Dynamo platform and use the Element.Geometry node to extract the thin shell surface Surf of the hyperbolic concrete shell structure.

3. The method for modeling a hyperbolic concrete shell structure construction formwork according to claim 1, wherein: Generate a reference plane Plane.TOP above the shell surface Surf and a reference plane Plane.Bottom below the shell surface Surf. Based on the reference planes Plane.TOP and Plane.Bottom, obtain the coordinates of the highest vertex P.Top and the lowest point P.Bottom of the shell surface Surf, including: Use the ReferncePlane.ByLine node to generate the reference plane Plane.TOP above the thin shell surface Surf and the reference plane Plane.Bottom below the thin shell surface Surf; based on the reference plane Plane.TOP and the reference plane Plane.Bottom, use Geometry.ClosestPointTo to obtain the coordinates of the highest vertex P.Top and the lowest point P.Bottom of the thin shell surface Surf.

4. The method for modeling a hyperbolic concrete shell structure construction formwork according to claim 1, wherein: Merge the thin shell surface Surf and its projection surface PlaneXY to generate a geometric body to obtain the erection range body V of the spatial formwork, including: Select the Solid.ByProjectSurfaceZAxis node to merge the thin shell surface Surf with its projection surface PlaneXY to generate a geometric body to obtain the erection range body V of the spatial formwork.

5. The method for modeling a hyperbolic concrete shell structure construction formwork according to claim 1, wherein: The intersection of each elevation plane Plane (H_1, H_2, ... H_n) and the erection range body V of the spatial formwork is calculated to obtain the contour plane Plane {〖CL〗_1,〖CL〗_2……〖CL〗_n} with the contour curve of the surface as the edge, including: Select the Geometry.Intersect node to intersect each elevation plane Plane (H_1, H_2, ... H_n) with the erection range body V of the spatial formwork, thereby obtaining the contour plane Plane {〖CL〗_1, 〖CL〗_2 ... 〖CL〗_n} with the surface contour curve as the edge.

6. The method for modeling a hyperbolic concrete shell structure construction formwork according to claim 1, wherein: Based on the planes {〖CL〗_1,〖CL〗_2……〖CL〗_n} of equal height, the upper unit block V1 of the rack is obtained, including: The Surface.Thicken nodes of each plane {〖CL〗_1, 〖CL〗_2…〖CL〗_n} are selected, the maximum height H of the keel is selected as the thickness parameter, and a block is generated unilaterally along the negative direction of the Z axis. Based on the block, the area where the bent must be erected at least in the irregular space below the thin shell surface Surf is obtained to obtain the upper unit block V1 of the bent.

7. The method for modeling a hyperbolic concrete shell structure construction formwork according to claim 1, wherein: Combine the upper unit block V1 and the lower unit block V2 to obtain the overall curved lower unit block erection range V3, including: Select Solid.ByUnion to combine the upper unit block V1 and the lower unit block V2 of the rack to obtain the rack erection range V3 under the overall curved surface.

8. The method for modeling a hyperbolic concrete shell structure construction formwork according to claim 1, wherein: According to the bent erection range V3 under the overall curved surface, a simplified bent erection model consisting of geometric parameter blocks is finally obtained, including: The frame erection parameters are determined based on the thin shell concrete load and construction load calculations. Based on the frame erection range V3 under the overall curved surface, the frame erection parameters, the horizontal distance a, the vertical distance b, and the step distance h, the Geometry.Split node is used to split the block into geometric parameter blocks of the formwork, so as to finally obtain a simplified frame erection model composed of geometric parameter blocks.

9. The method for modeling a hyperbolic concrete shell structure construction formwork according to claim 1, wherein: The simplified model of the bent frame erection includes: the position and length of each rod of the bent frame.

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