An Integrated Design Method for Steel Structures of Landscape Sculptures Based on a Parametric Platform

Abstract

This invention relates to an integrated design method for landscape sculpture steel structures based on a parametric platform, comprising: constructing a structural geometric model; further establishing a structural calculation model based on the structural geometric model; automatically optimizing the member cross-sections using a pre-defined standard library of member cross-sections to determine the optimal member cross-section; assigning the optimal member cross-section to the constructed structural geometric model, performing model collision checks, and completing the structural design process. Compared with existing technologies, this invention determines the internal and external boundary control conditions of the structure based on architectural and equipment disciplines. Through the automatic establishment of the structural model, automatic optimization of member cross-sections, and automatic collision checks of the 3D model, it can achieve automated and integrated design of irregularly shaped buildings such as landscape sculptures, effectively improving structural design efficiency and ensuring the accuracy and reliability of structural design. Simultaneously, this invention provides a standardized library of member cross-section dimensions to further ensure the construction efficiency and quality of irregularly shaped steel structures.

Description

Technical Field

[0001] This invention relates to the field of steel structure design technology, and in particular to an integrated design method for landscape sculpture steel structures based on a parametric platform. Background Technology

[0002] Currently, theme parks have surpassed natural scenic areas to become a new hot spot for tourism. As an important component of theme parks, the structural design of landscape sculptures is a current challenge in architectural design. The traditional method for designing landscape sculptures involves combining the functional layout of the building within the sculpture, cutting the three-dimensional model of the artificial mountain surface at equal intervals along the X and Y directions to determine the structural column positions, arranging structural beams and secondary steel structures according to the concept of layers, then adjusting them in conjunction with the architectural model, and finally importing the structural geometry into structural calculation software for analysis.

[0003] However, the 3D models of landscape sculptures are complex and lack regularity, leading to numerous collisions between structural components and buildings, equipment, and amusement facilities. Traditional design methods rely entirely on designers manually modeling, verifying, and adjusting, resulting in low efficiency and a high risk of errors. Furthermore, due to the low level of automation in traditional design methods, the cross-sections of the main steel frame and secondary steel structure members are determined once and for all based on the designer's experience, leaving little room for later rework and optimization, and resulting in significant waste in structural design. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology by providing an integrated design method for landscape sculpture steel structures based on a parametric platform, which can effectively improve the efficiency of structural design and ensure the accuracy and reliability of structural design.

[0005] The objective of this invention can be achieved through the following technical solution: an integrated design method for the steel structure of landscape sculptures based on a parametric platform, comprising the following steps:

[0006] S1. Construct the structural geometric model;

[0007] S2. Based on the structural geometric model, further establish the structural calculation model;

[0008] S3. Based on the pre-set standard library of bar sections, automatically optimize the bar sections to determine the optimal bar section;

[0009] S4. Assign the optimal member cross-section to the structural geometric model constructed in step S1, perform model collision checks, and complete the structural design process.

[0010] Furthermore, step S1 specifically includes the following steps:

[0011] S11. Analyze the building model to extract the outer boundary skin of the structure, the inner boundary skin of the structure, and the column position control conditions;

[0012] S12. Based on the data information extracted in step S11, further filter the structural column positions, generate the main frame, generate the secondary frame, and determine the arrangement of supports, tie rods, and corbels to complete the establishment of the structural geometric model.

[0013] Furthermore, step S12 specifically includes the following steps:

[0014] S121. Based on the extracted outer boundary skin of the structure, generate the steel mesh cutting line and steel mesh hanging point information in sequence;

[0015] S122. Based on the extracted structural inner boundary skin and column position control conditions, and combined with the generated steel mesh hanging point information, the structural column positions are sequentially selected and the main frame is generated.

[0016] S123. Based on the generated main frame and the steel mesh hanging point information, further generate the secondary frame;

[0017] Based on the generated main frame and the selected structural column positions, complete the arrangement of supports, tie rods, and corbels;

[0018] This leads to the establishment of a structural geometric model.

[0019] Furthermore, the specific mesh size of the steel mesh hanging point in the steel mesh hanging point information is: 1.5m×1.5m~2.0m×2.0m.

[0020] Furthermore, the subframe, supports, tie rods, and corbels all adopt standardized rod cross-sections.

[0021] Furthermore, in the subframe, when the cantilever span of the cantilever section is less than 3m, a cantilever beam arrangement is adopted; when the cantilever span of the cantilever section is greater than or equal to 3m, a truss arrangement is adopted.

[0022] Furthermore, step S2 specifically includes the following steps:

[0023] S21. Straighten the outer boundary skin of the structure extracted in step S11, and then perform structural skinning processing in combination with the established structural geometric model.

[0024] Assign initial cross-sectional dimensions to the established structural geometric model;

[0025] S22. By applying loads and support constraints, the structural calculation analysis is completed, and the structural calculation results are obtained.

[0026] Furthermore, step S3 specifically includes the following steps:

[0027] S31. Extract the internal forces of each member from the structural calculation results obtained in step S22;

[0028] S32. Based on the internal forces of each member extracted in step S31, select the corresponding optimal member cross-section from the pre-set member cross-section standard library.

[0029] Further, the specific process of step S32 is as follows: First, calculate the internal force envelope surface of each member in the member section standard library. Based on the internal forces of each member extracted in step S31, select the smallest member section that can fit the internal force envelope surface from the member section standard library, which is the optimal member section.

[0030] Furthermore, step S4 specifically involves assigning the optimal member cross-section to the structural geometric model constructed in step S1 to obtain a three-dimensional solid model of the structure.

[0031] The structural design process involves performing a collision check between the 3D solid model of the structure and the architectural model.

[0032] Compared with existing technologies, this invention is based on a parametric platform and designs four sub-processes, including establishing a structural geometric model, establishing a structural calculation model, automatic optimization of member cross-sections, and collision checking of the three-dimensional model, thereby realizing a fully automated design process and effectively improving the efficiency of structural design.

[0033] In the process of establishing the structural geometric model, this invention extracts the inner and outer skins of the structure to control the inner and outer boundaries of the designed structural members, thereby avoiding three-dimensional spatial collisions with the requirements of other disciplines and reducing conflict points for subsequent three-dimensional model collision checks.

[0034] This invention, based on the structural layout characteristics of landscape sculptures and a selected library of member cross-sections, presents a novel method for optimizing member cross-sections. First, the internal force envelope surface of each member in the cross-section library is calculated. Then, the calculated internal forces of each member are extracted. Finally, the smallest member cross-section that fits the internal force envelope surface is selected. This provides sufficient optimization space, ensuring the accuracy and reliability of member cross-section design while improving design efficiency.

[0035] This invention takes into account the large number of landscape sculpture components and their complex spatial relationships, with almost no two overlapping nodes being exactly the same. Therefore, based on the structural layout of the secondary steel structure, a standardized section library is provided to effectively improve the construction efficiency and quality of irregularly shaped steel structures on site. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the method flow of the present invention;

[0037] Figure 2aThis is a schematic diagram of the cutting lines for generating the steel mesh based on the outer skin of the structure in the embodiment;

[0038] Figure 2b This is a schematic diagram illustrating the generation of steel mesh hanging point information based on the cutting line in the embodiment;

[0039] Figure 2c This is a schematic diagram illustrating the selection of structural columns and the generation of the main frame in the embodiment;

[0040] Figure 2d This is a schematic diagram of the generation of the subframe in the embodiment;

[0041] Figure 2e This is a schematic diagram of the arrangement of tie rods, supports, and brackets in the embodiment;

[0042] Figure 2f This is a schematic diagram of the generated structural geometric model in the embodiment;

[0043] Figure 2g This is a schematic diagram of the generated structural calculation model in the embodiment;

[0044] Figure 2h This is a schematic diagram of collision checking of the 3D model in the embodiment. Detailed Implementation

[0045] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0046] Example

[0047] like Figure 1 As shown, a method for integrated design of steel structures for landscape sculptures based on a parametric platform includes the following steps:

[0048] S1. Construct the structural geometric model;

[0049] S2. Based on the structural geometric model, further establish the structural calculation model;

[0050] S3. Based on the pre-set standard library of bar sections, automatically optimize the bar sections to determine the optimal bar section;

[0051] S4. Assign the optimal member cross-section to the structural geometric model constructed in step S1, perform model collision checks, and complete the structural design process.

[0052] This embodiment applies the above-described method and process, based on the Grasshopper platform, and integrates software such as Rhinoceros, SAP2000 / YJK, and Revit / Navisworks Manage to automatically create structural models, automatically optimize member cross-sections, and automatically perform collision checks on the 3D model, thereby achieving automated and integrated design of irregularly shaped buildings such as landscape sculptures. It mainly includes the following:

[0053] First, establish a structural geometric model, such as Figures 2a to 2f As shown, the inner and outer skins of the structure are extracted in sequence, the structural columns are screened, the main frame is generated, the secondary frame and supports, tie rods and corbels are generated.

[0054] Extracting the inner and outer skins of the structure is to control the inner and outer boundaries of the structural members and avoid collisions in three-dimensional space with the requirements of other disciplines, thereby reducing conflict points for subsequent collision checks of the three-dimensional model.

[0055] This technical solution takes into account that the outer surface of landscape sculptures usually requires thematic decoration, with exaggerated and gorgeous shapes, and the structure often uses artificial rock skin and steel mesh for load-bearing. Based on the consideration of both structural self-support and skin stiffness effect, the design of the steel mesh size for the steel hanging points is 1.5m×1.5m~2.0m×2.0m.

[0056] In addition, the planar locations corresponding to the generated rebar hanging points are all possible column locations of the main structure. Users can select column locations based on the spatial requirements of other disciplines and the conventional column layout principles, thereby establishing the main structural framework.

[0057] Based on the main structural layout and rebar attachment point information, secondary structural frames, supports, tie rods, and corbels are generated. For example, the horizontal connection between two adjacent rebar attachment points is used to generate a horizontal tie rod by checking for interference with the outer contour of the main structure; diagonal lines are drawn at the ends of the horizontal tie rods to generate vertical cross braces; and horizontal cross braces are obtained by connecting any two points between the rebar attachment point and the end of the diagonal brace, by retaining straight lines with zero Z-component vectors and removing excessively long lines.

[0058] This technical solution also considers the large number of landscape sculpture components and their complex spatial relationships, with almost no two overlapping nodes being exactly alike. To improve construction efficiency, standardized member cross-sectional dimensions are adopted for secondary steel structures, supports, and tie rods. In practical applications, the standard cross-section library can use narrow-flange hot-rolled steel sections, such as HN150x75x5x7, HN200x100x5.5x8, HN250x125x6x9, HN300x150x6.5x9, HN350x175x7x11, HN400x200x8x13, HN450x200x9x14, and HN500x200x10x16.

[0059] In order to standardize the design of the secondary steel structure section, this technical solution adopts a cantilever beam arrangement when the cantilever span is less than 3 meters, and a truss arrangement when the cantilever span is greater than 3 meters. The truss form can be an upper triangular truss.

[0060] II. Figure 2gAs shown, this technical solution takes into account the complex shapes of landscape sculptures, whose outer skins are mostly spatial irregular curved surfaces. Correspondingly, the outer boundary members of the generated structural geometric model are also spatial irregular curves. To facilitate the construction of the skin during the structural calculation model creation, the curves of the outer boundary of the structural geometric model need to be straightened.

[0061] When inputting structural loads, the surface loads on the skin can be converted into point loads at each hanging point. Furthermore, when calculating the point loads at each hanging point, intermediate interpolation points should be generated in the interconnected network of hanging points. The dependent area of ​​each hanging point on the outer skin is then calculated using the triangular mesh formed by the hanging points and interpolation points, and the load on each hanging point is subsequently calculated.

[0062] III. The traditional structural design software section optimization logic is as follows: based on the calculation results and a given initial section library, a member section that meets the code requirements is selected, and then it is re-substituted into the structural calculation model for recalculation. This iterative calculation and design process is repeated to select a superior member section, resulting in low computational efficiency. This technical solution, based on the structural layout characteristics of landscape sculptures and the selected member section library, presents a new member section optimization method: first, the internal force envelope surface of each member in the section library is calculated; then, the calculated internal forces of each member are extracted; finally, the smallest member section that fits the internal force envelope surface is selected.

[0063] The principle of automatic optimization of member cross-section is to directly select the member cross-section size from the standard cross-section library based on the initial internal force envelope value of the member.

[0064] IV. After the structural calculations and design are completed, since the structural calculation model has been linearized, the member cross-sections obtained from the structural calculations need to be assigned to the initial structural geometric model before subsequent 3D model collision checks are performed (e.g., Figure 2h (As shown).

[0065] In summary, this technical solution achieves fully automated design based on a parametric platform, which can improve the efficiency of structural design; it proposes an automatic cross-section optimization method based on structural layout and member internal forces; in addition, it provides a standardized member cross-section size library based on the structural layout of the secondary steel structure to ensure the construction efficiency and quality of irregular steel structures.

Claims

1. A method for integrated design of steel structures for landscape sculptures based on a parametric platform, characterized in that, Includes the following steps: S1. Construct the structural geometric model; S2. Based on the structural geometric model, further establish the structural calculation model; S3. Based on the pre-set standard library of bar sections, automatically optimize the bar sections to determine the optimal bar section; S4. Assign the optimal member cross section to the structural geometric model constructed in step S1, perform model collision checks, and complete the structural design process. Step S1 specifically includes the following steps: S11. Analyze the building model to extract the outer boundary skin of the structure, the inner boundary skin of the structure, and the column position control conditions; S12. Based on the data information extracted in step S11, further filter the structural column positions, generate the main frame, generate the secondary frame, and determine the arrangement of supports, tie rods, and corbels to complete the establishment of the structural geometric model. Step S2 specifically includes the following steps: S21. Straighten the outer boundary skin of the structure extracted in step S11, and then perform structural skinning processing in combination with the established structural geometric model. Assign initial cross-sectional dimensions to the established structural geometric model; S22. By applying loads and support constraints, the structural calculation and analysis are completed, and the structural calculation results are obtained. Step S3 specifically includes the following steps: S31. Extract the internal forces of each member from the structural calculation results obtained in step S22; S32. Based on the internal forces of each member extracted in step S31, select the corresponding optimal member section from the pre-set member section standard library. The specific process of step S32 is as follows: First, calculate the internal force envelope surface of each member in the member section standard library. Based on the internal forces of each member extracted in step S31, select the smallest member section that can fit the internal force envelope surface from the member section standard library, which is the optimal member section.

2. The integrated design method for landscape sculpture steel structure based on a parametric platform according to claim 1, characterized in that, Step S12 specifically includes the following steps: S121. Based on the extracted outer boundary skin of the structure, generate the steel mesh cutting line and steel mesh hanging point information in sequence; S122. Based on the extracted structural inner boundary skin and column position control conditions, and combined with the generated steel mesh hanging point information, the structural column positions are sequentially selected and the main frame is generated. S123. Based on the generated main frame and the steel mesh hanging point information, further generate the secondary frame; Based on the generated main frame and the selected structural column positions, complete the arrangement of supports, tie rods, and corbels; This leads to the establishment of a structural geometric model.

3. The integrated design method for landscape sculpture steel structure based on a parametric platform according to claim 2, characterized in that, The specific mesh size of the steel mesh hanging points in the information is: 1.5m×1.5m~2.0m×2.0m.

4. The integrated design method for landscape sculpture steel structure based on a parametric platform according to claim 2, characterized in that, The subframe, supports, tie rods, and corbels all use standardized rod sections.

5. The integrated design method for landscape sculpture steel structure based on a parametric platform according to claim 2, characterized in that, In the aforementioned subframe, when the cantilever span of the cantilever section is less than 3m, a cantilever beam arrangement is used; when the cantilever span of the cantilever section is greater than or equal to 3m, a truss arrangement is used.

6. The integrated design method for landscape sculpture steel structure based on a parametric platform according to claim 1, characterized in that, Specifically, step S4 involves assigning the optimal member cross section to the structural geometric model constructed in step S1 to obtain a three-dimensional solid model of the structure. The structural design process involves performing a collision check between the 3D solid model of the structure and the architectural model.

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