Three-dimensional integrated design method for outer packing steel structure

Abstract

The invention provides a three-dimensional integrated design method for an outer packing steel structure, which comprises the following steps of: preferentially carrying out preliminary adjustment on a rhinoceros software three-dimensional model from a design unit and technical conditions according to a preset reference point and positive and negative zero elevation adjustment conditions; according to the technical conditions, the model after the preliminary adjustment is combined to generate a corresponding constant and wind load calculation table and a preliminary model selection table of a rod piece as an initial input basis; establishing an outer packing steel structure line model in the preliminarily adjusted model according to the initial input basis to generate a plurality of outer packing steel structure line model units, grouping the outer packing steel structure line model units according to a preset grouping rule, and transmitting the outer packing steel structure line model units to MIDAS software by rhinoceros software to determine a final design section so as to obtain an MIDAS unit calculation model; the method comprises the following steps: establishing a three-dimensional BIM model, a related drawing and a material list, then transmitting to TEKLA software to create the three-dimensional BIM model, the related drawing and the material list, obtaining a TEKLA three-dimensional model, and sending the TEKLA three-dimensional model to a steel structure construction unit, thereby solving a finished product error caused by software selection due to insufficient experience of a designer, and improving the working efficiency of the designer.

Description

Technical Field

[0001] The invention relates to the technical field of building steel structure design, and in particular to a three-dimensional integrated design method for an outer packaging steel structure. Background Art

[0002] As the exterior design of modern buildings becomes increasingly diversified and personalized, exterior steel structures have become an important part of realizing architects' creativity.

[0003] External packaging steel structures are all spatial structures, which have the characteristics of complex shapes and diverse forms. In the existing design practice, designers usually select multiple corresponding processing software for analysis and processing based on their professional experience. There is a lack of a complete, systematic and standardized design process and technical means. If the output of the initial processing software selected forms an error, the subsequent software processing will magnify the error. Therefore, it is very dependent on the professional experience of the designers. Ultimately, it is difficult for designers to carry out their work efficiently when faced with the design tasks of external packaging steel structures, and the quality of the final products designed by each designer varies greatly.

[0004] Therefore, a new design method is needed to help designers complete the entire process from modeling, calculation to construction drawing in a more systematic way, so as to improve the design quality and efficiency. Summary of the invention

[0005] The purpose of the technical solution of the present invention is to realize the whole process design from model creation to structural calculation and then to construction drawing, which greatly improves the design efficiency and quality and reduces the design difficulty and cost.

[0006] In order to achieve the above-mentioned purpose of the invention, the technical solution of the present invention provides a three-dimensional integrated design method of an outer packaging steel structure, comprising the following steps:

[0007] Obtain the Rhino software 3D model and technical conditions from the design unit, and make preliminary adjustments to the Rhino software 3D model according to the preset reference points and the positive and negative zero elevation adjustment conditions to obtain the model after preliminary adjustment; the technical conditions include: the specifications of the outer packaging materials, the construction process requirements and the environmental conditions of the project area; the preset reference points include: for a single building in an orthogonal axis network, set the horizontal grid lines in the orthogonal axis network with a preset distance as the letter axis starting from the A axis from bottom to top, set the vertical and horizontal grid lines in the orthogonal axis network with a preset distance as the digital axis starting from the 1 axis from left to right, and take the intersection of the 1 axis and the A axis as the origin (world coordinate 0,0,0); for a single building in a circular axis network, take the center of the building as the origin, and modify the reference point of the Rhino software 3D model; the positive and negative zero elevation adjustment conditions include: the elevation Z axis value "0" is set as the positive and negative zero elevation of the building unit;

[0008] Generate the calculation table of constant and wind loads and the preliminary selection table of rods according to the technical conditions and the preliminarily adjusted model as the initial input basis;

[0009] According to the calculation table of constant and wind loads, the span and stress state of the rods of the model after preliminary adjustment are analyzed, and then the pressure, bending moment and torque borne by the rods are calculated. By consulting the preliminary selection table of rods, the target rods are selected, and the names of the corresponding working layers of the rods are defined by the names of the rod specifications in the model after preliminary adjustment. In the working layer, the spatial grid structure system that meets the span requirements in the rod selection table is used to perform form finding, and the outer packaging steel structure line model is constructed to generate multiple outer packaging steel structure line form units. The types are grouped according to the hierarchical structure and type naming method corresponding to the single outer packaging steel structure line form unit, and multiple outer packaging steel structure line form units after group management are obtained;

[0010] Export the multiple outer packaging steel structure line formwork units after group management into dxf format files and transfer them from Rhino software to MIDAS software. Calculate the optimized cross section based on the additional load and the environmental conditions of the project area, and verify the optimized cross section until the verification is passed. Determine the final design cross section and generate the MIDAS unit calculation model.

[0011] The MIDAS unit calculation model is input into the TEKLA software through the Link_TS_Midas data interface to create a 3D BIM model of the outer packaging steel structure, related drawings and material lists, and obtain a TEKLA 3D model;

[0012] Send the TEKLA 3D model to the steel structure construction unit for steel structure deepening, processing and management.

[0013] Preferably, based on the type and thickness of the outer packaging material and the surface area of ​​the outer packaging, the surface load transferred by the outer packaging to the outer packaging steel structure is calculated to obtain the constant load in the constant and wind load calculation table; based on the basic wind pressure at the project site, the wind pressure value is determined taking into account the ground roughness and building height in the area, and the wind load in the constant and wind load calculation table is obtained; the constant load and wind load calculation table is established by combining the constant load and wind load.

[0014] Preferably, the constant load calculation includes: for fiberglass with a thickness of 6 to 10 mm, the value is 0.5 kN / m2, for roof tiles with a thickness of 20 to 25 mm, the value is 1.5 kN / m2, for professional sculpture mortar with a thickness of 30 to 120 mm, the value is 3.0 kN / m2, and the load area obtained by querying the model outer packaging area parameters through Rhino software.

[0015] Preferably, the preliminary selection table of the rods takes into account the safety and economy of the structure and the stress characteristics of the outer packaging steel structure components, including a selection table for square tubes under axial compression and a selection table for square tubes under bending and torsion.

[0016] Preferably, according to the stress of the outer packaging rod, which is mainly compression and bending and torsion, preliminary calculations are performed based on the span, stress state, load and deformation factors of the square tube section to obtain the selection table of the square tube under axial compression and the selection table of the square tube under bending and torsion.

[0017] Preferably, for the outer packaging steel structure wire model with repetitive features or predictable geometric patterns, Grasshopper, a visual programming tool of Rhino software, is used for programming to write geometric parameters that define the basic geometric properties of the model, set constraints on the position and direction of fixed points and connection points in the model, allow users to adjust the change parameters of key variables, and define logical operations that define the relationship between model elements, so that the outer packaging steel structure wire model can automatically adjust the geometric shape according to different design requirements, thereby improving modeling efficiency and accuracy.

[0018] Preferably, the naming method follows the format of "layer number-unit type-number".

[0019] Preferably, by setting up the Link_TS_Midas data interface to check and adjust the parameters related to the preset square tube section name in the TEKLA software, the preset square tube section name is matched with the square tube section name in the MIDAS unit calculation model.

[0020] The technical solution of the present invention proposes a three-dimensional integrated design method for outer packaging steel structure, which uses the three-dimensional model and technical conditions of the Rhino software from the design unit according to the preset reference point and the positive and negative zero elevation adjustment conditions, and gives priority to the preliminary adjustment of the three-dimensional model of the Rhino software, and then generates the corresponding constant and wind load calculation table and the preliminary selection table of the rod according to the technical conditions and the model after the preliminary adjustment as the initial input basis, and establishes the outer packaging steel structure line mold in the model after the preliminary adjustment according to the initial input basis to generate multiple outer packaging steel structure line mold units, and groups the multiple outer packaging steel structure line mold units according to the preset grouping rules, and transmits the Rhino software to the MIDAS software to determine the final design section to obtain the MIDAS unit calculation model, and the MIDAS software transmits the MIDAS unit calculation model to the TEKLA software to create a three-dimensional BIM model, related drawings and material lists, and obtains the TEKLA three-dimensional model and sends it to the steel construction unit to deepen, process and manage the steel structure, so as to realize the final outer packaging steel structure design. The technical solution of the present invention solves the finished product error caused by the selection of software due to the lack of experience of designers, and improves the work efficiency of designers by providing a systematic and standardized design method. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a flow chart of a three-dimensional integrated design method for an outer packaging steel structure provided by an embodiment of the present invention;

[0022] Figure 2 A list of software and a schematic diagram of its use provided by the embodiments of the present invention;

[0023] Figure 3 A schematic diagram of a three-dimensional model of the Rhino software provided in an embodiment of the present invention;

[0024] Figure 4 A schematic diagram showing the calculation of the constant load of the outer packaging provided in an embodiment of the present invention;

[0025] Figure 5 A schematic diagram showing wind load calculation provided by an embodiment of the present invention;

[0026] Figure 6 A schematic diagram showing the selection of a square tube under axial compression in a preliminary selection table of a rod provided in an embodiment of the present invention;

[0027] Figure 7 A schematic diagram showing the selection of a square tube under bending and torsion in a preliminary selection table of a rod provided in an embodiment of the present invention;

[0028] Figure 8 A schematic diagram of a Rhino wire form model of an outer packaging steel structure composed of multiple outer packaging steel structure wire form units provided in an embodiment of the present invention;

[0029] Fig. 9 A schematic diagram of a MIDAS unit calculation model provided in an embodiment of the present invention;

[0030] Fig.10 A schematic diagram of a TEKLA three-dimensional model provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0032] like Figure 1 As shown, the embodiment of the present invention provides a three-dimensional integrated design method for an outer packaging steel structure, which mainly adopts the following Figure 2 The method covers the entire process from model creation to structural calculation to construction drawing, and realizes seamless collaboration across software, significantly improving design efficiency and quality, and reducing design difficulty and cost. It includes the following steps:

[0033] Step 1, accept and check the Rhino software 3D model and technical conditions. Accept the Rhino software 3D model and technical conditions from the design unit, and make preliminary adjustments to the Rhino software 3D model based on the preset reference points and the positive and negative zero elevation adjustment conditions to obtain the preliminary adjusted model, i.e. the adjusted Rhino outer packaging model and the adjusted Rhino civil engineering 3D model. The Rhino software 3D model includes: Rhino outer packaging model, Rhino civil engineering 3D model. The technical conditions include: outer packaging material specifications, construction process requirements and environmental conditions in the area where the project is located. Among them, the outer packaging material specifications include material type, thickness, color and texture, etc., the construction process requirements include connection method and sealing requirements, etc., and the environmental conditions in the area where the project is located include: climate characteristics, wind pressure level and earthquake fortification intensity, etc. The preset reference points include: for a single building on an orthogonal axis grid, the horizontal grid lines at preset intervals in the orthogonal axis grid are set as letter axes starting from axis A from bottom to top; the vertical and horizontal grid lines at preset intervals in the orthogonal axis grid are set as digital axes starting from axis 1 from left to right, and the intersection of axis 1 and axis A is taken as the origin (world coordinate 0,0,0); for a single building on a circular axis grid, the center of the building is taken as the origin, and the reference points of the unified Rhino packaging model and the civil engineering three-dimensional model are modified to ensure that the model reference points are correct. The model reference point defines the spatial positioning of the three-dimensional model, and is the position reference system of all geometric elements relative to this point. The positive and negative zero elevation adjustment conditions include: the elevation Z-axis value "0" is set to the positive and negative zero elevation of the building unit, that is, the reference height of the model in the vertical direction is specified to facilitate the accurate execution of subsequent steps. See the schematic diagram after this step is completed. Figure 3 .

[0034] Step 2. Based on the technical conditions determined in step 1, combined with the adjusted Rhino outer packaging model and the adjusted Rhino civil engineering three-dimensional model, generate constant and wind load calculation tables and preliminary selection tables for rods in accordance with the "Code for Loads on Building Structures" GB50009-2012 as the initial input basis for establishing the structural model. For constant loads, based on the type and thickness of the outer packaging material and the surface area of ​​the outer packaging, calculate the surface load transferred by the outer packaging to the outer packaging steel structure. Constant load calculations include: FRP (glass reinforced plastic), thickness 6 to 10 mm, value 0.5 kN / m2; GRC (roof tiles), thickness 20 to 25 mm, value 1.5 kN / m2; TCP (professional sculpture mortar), thickness 30 to 120 mm, value 3.0 kN / m2; load area, query the model outer packaging area parameters through the Rhino software, see Figure 4For wind load, the wind pressure value is determined based on the basic wind pressure of the project location, taking into account the ground roughness and building height in the area. Wind load calculation is calculated according to the local basic wind pressure according to the specification, see Figure 5 The preliminary selection of rods is based on the results of load calculations, taking into account the safety and economy of the structure and the stress characteristics of the outer packaging steel structure components. The square tube form that complies with the "Standard for Cold-Formed Hollow Steel Sections for Structures" GBT6728-2017 is selected, and several candidate sections are determined through preliminary calculations. The preliminary selection table for rods includes a selection table for square tubes under axial compression and a selection table for square tubes under bending and torsion. Considering that the outer packaging rods are mainly subjected to compression and bending and torsion, the square tube form is selected as the cross-section. Preliminary calculations are performed according to span, stress state, load, and deformation factors to form a rod selection table, see Figure 6 and Figure 7 .

[0035] Step three, in the Rhino software, according to the constant and wind load calculation table in step two, analyze the span and stress state of the rods in the adjusted Rhino outer packaging model and the adjusted Rhino civil engineering 3D model, and then calculate the pressure, bending moment and torque on the rods. By referring to the preliminary selection table of the rods, select the appropriate rods, and name the working layer in the adjusted Rhino outer packaging model and the adjusted Rhino civil engineering 3D model by defining the name of the rod specification with the name of the corresponding layer of the rod.

[0036] In the working layer, a spatial grid structure system that meets the span requirements in the bar selection table is used to find the form, build an outer packaging steel structure line model and generate multiple outer packaging steel structure line model units. For outer packaging steel structure line models with repetitive characteristics or predictable geometric patterns (for example, units with the same or similar shapes, sizes or arrangements), the visual programming tool Grasshopper of Rhino software is used for programming, and parametric programs are written to assist in modeling. The internal operating conditions of the parametric program include but are not limited to: defining the geometric parameters of the basic geometric properties of the model (such as length, width, height, etc.); setting the position and direction constraints of the fixed points and connection points in the model; allowing the user to adjust the change parameters of key variables (such as unit spacing, rotation angle, etc.); and defining the logical operations of the relationship between model elements. The parametric program enables the outer packaging steel structure line model to automatically adjust its geometric form according to different design requirements, thereby improving modeling efficiency and accuracy.

[0037] Multiple outer packaging steel structure wire formwork units are grouped according to the rules to obtain multiple outer packaging steel structure wire formwork units after group management. The group naming method follows the format of "layer number-unit type-number", for example, "1F-T1-01" represents the first tower unit on the first floor; "2F-T2-02" represents the second tower unit on the second floor. The naming method makes it easy to identify the hierarchical structure and type of each unit. See the schematic diagram after this step is completed. Figure 8 .

[0038] Step 4: Export the multiple outer packaging steel structure line formwork units grouped and managed in step 3 as dxf format files and transfer them to MIDAS software. Calculate the optimized cross-sections based on additional loads, environmental conditions in the project area, etc., and verify the optimized cross-sections according to the "Steel Structure Design Standard" GB50017-2017 until the verification is passed, determine the final design cross-section, and generate the MIDAS unit calculation model. See the schematic diagram after this step is completed. Fig. 9 .

[0039] Step five, input the MIDAS unit calculation model into the TEKLA software through the Link_TS_Midas data interface to create a three-dimensional BIM model of the outer packaging steel structure, related drawings and material lists, and obtain a TEKLA three-dimensional model. Prior to this, it is necessary to ensure that the square tube section name in TEKLA matches the final design square tube section name of the MIDAS section. This step can be achieved by setting the corresponding parameters in the Link_TS_Midas data interface. The specific method is to check and adjust the preset square tube section name in the TEKLA software before importing the model so that it is consistent with the square tube section name used in the MIDAS calculation software. In TEKLA, customized drawing and material list templates are based on project-specific requirements. Template types include plan layout views, elevation layout views, section views, node detail views, three-dimensional views, index views, component lists, etc. The content includes annotation styles, view display modes, component filters, drawing frames and header information, etc. By using customized templates, three-dimensional BIM models, related drawings and material lists are generated. See the schematic diagram after this step is completed. Fig.10 . The 3D BIM model must reach LOD300 level accuracy to ensure that the size, position and connection details of all structural components are accurate. The relevant drawings must be construction drawings that comply with "Depth and Representation Methods of Steel Structure Design Drawings" 03G102, including plan drawings, elevation drawings, section drawings and node details. The material list must list the specifications, quantity and weight of all materials used to construct the outer packaging steel structure.

[0040] Step six, send the TEKLA 3D model of step five to the steel structure construction unit for deepening, processing and management of the steel structure. That is, based on the TEKLA 3D model, the steel structure user unit completes the in-depth design, steel structure production and management work to ensure the consistency of drawing and model data, improve quality and avoid repeated modeling.

[0041] Beneficial effects of the embodiments of the present invention:

[0042] The embodiment of the present invention proposes a systematic outer packaging steel structure design process, covering the entire process from modeling to drawing and list output, realizing seamless cross-software collaboration and significantly improving design efficiency and accuracy.

[0043] By adopting clear load calculation standards, we ensure that the structural design is safe and reasonable. In terms of 3D modeling, we use Rhino software and its Grasshopper plug-in to achieve rapid construction of complex structures and efficient parametric iterative design, which improves the flexibility and response speed of the design.

[0044] In addition, the present invention also carefully classifies and names the wire mold units in the model, simplifies the complexity of project management, and promotes effective communication and collaboration among members.

[0045] At the same time, the design model can be directly transmitted to the construction unit, reducing errors in the construction process, accelerating the progress of the project, and comprehensively improving the overall construction quality.

[0046] Specific practice shows that the design method of the embodiment of the present invention can greatly increase the design capacity of the outer packaging steel structure and improve the design efficiency. The method is also of general significance, especially for engineering projects with high design accuracy requirements, complex shapes, large number of units and tight construction period.

Claims

1. A three-dimensional integrated design method for an outer packaging steel structure, characterized in that: The following steps are involved: Obtain the Rhino software 3D model and technical conditions from the design unit, and make preliminary adjustments to the Rhino software 3D model based on the preset reference points and positive and negative zero elevation adjustment conditions to obtain a model after preliminary adjustment; The technical conditions include: specifications of external packaging materials, construction process requirements and environmental conditions of the project area; the preset reference points include: for single buildings in an orthogonal axis grid, the horizontal grid lines at preset intervals in the orthogonal axis grid are set as letter axes starting from axis A from bottom to top, and the vertical and horizontal grid lines at preset intervals in the orthogonal axis grid are set as digital axes starting from axis 1 from left to right, with the intersection of axis 1 and axis A as the origin (world coordinate 0,0,0); for single buildings in a circular axis grid, the center of the building is used as the origin to modify the reference point of the Rhino software 3D model; the positive and negative zero elevation adjustment conditions include: the elevation Z-axis value "0" is set as the positive and negative zero elevation of the building unit; Generate the calculation table of constant and wind loads and the preliminary selection table of rods according to the technical conditions and the preliminarily adjusted model as the initial input basis; According to the calculation table of constant and wind loads, the span and stress state of the rods of the model after preliminary adjustment are analyzed, and then the pressure, bending moment and torque borne by the rods are calculated. By consulting the preliminary selection table of rods, the target rods are selected, and the names of the corresponding working layers of the rods are defined by the names of the rod specifications in the model after preliminary adjustment. In the working layer, the spatial grid structure system that meets the span requirements in the rod selection table is used to perform form finding, and the outer packaging steel structure line model is constructed to generate multiple outer packaging steel structure line form units. The types are grouped according to the hierarchical structure and type naming method corresponding to the single outer packaging steel structure line form unit, and multiple outer packaging steel structure line form units after group management are obtained; Export the multiple outer packaging steel structure line formwork units after group management into dxf format files and transfer them from Rhino software to MIDAS software. Calculate the optimized cross section based on the additional load and the environmental conditions of the project area, and verify the optimized cross section until the verification is passed. Determine the final design cross section and generate the MIDAS unit calculation model. The MIDAS unit calculation model is input into the TEKLA software through the Link_TS_Midas data interface to create the outer packaging steel structure 3D BIM model, related drawings and material lists to obtain the TEKLA 3D model; the TEKLA 3D model is sent to the steel structure construction unit for steel structure deepening, processing and management.

2. A three-dimensional integrated design method for an outer packaging steel structure as claimed in claim 1, characterized in that: Based on the type and thickness of the outer packaging material and the surface area of ​​the outer packaging, the surface load transmitted by the outer packaging to the outer packaging steel structure is calculated to obtain the constant load in the constant and wind load calculation table. Based on the basic wind pressure at the project site, the wind pressure value is determined taking into account the ground roughness and building height in the area to obtain the wind load in the constant and wind load calculation table. The constant load and wind load calculation table are established by combining the constant load and wind load.

3. A three-dimensional integrated design method for outer packaging steel structure according to claim 1, characterized in that: The constant load calculation includes: fiberglass with a thickness of 6 to 10 mm, a value of 0.5 kN / m2, roof tiles with a thickness of 20 to 25 mm, a value of 1.5 kN / m2, professional sculpture mortar with a thickness of 30 to 120 mm, a value of 3.0 kN / m2, and the load area obtained by querying the model outer packaging area parameters through Rhino software.

4. A three-dimensional integrated design method for outer packaging steel structure according to claim 1, characterized in that: The preliminary selection table of the rods takes into account the safety and economy of the structure and the stress characteristics of the outer packaging steel structure components, including a selection table for square tubes under axial compression and a selection table for square tubes under bending and torsion.

5. A three-dimensional integrated design method for outer packaging steel structure according to claim 4, characterized in that: According to the stress of outer packaging rods, which is mainly compression, bending and torsion, preliminary calculations are made based on the span, stress state, load and deformation factors of the square tube section to obtain the selection table of square tubes under axial compression and the selection table of square tubes under bending and torsion.

6. A three-dimensional integrated design method for outer packaging steel structure according to claim 1, characterized in that: For the outer packaging steel structure line model with repetitive features or predictable geometric patterns, programming is performed using Grasshopper, a visual programming tool of Rhino Software, to write geometric parameters that define the basic geometric properties of the model, set constraints on the position and direction of fixed points and connection points in the model, allow users to adjust the change parameters of key variables, and define logical operations that define the relationship between model elements, so that the outer packaging steel structure line model can automatically adjust its geometric shape according to different design requirements, thereby improving modeling efficiency and accuracy.

7. A three-dimensional integrated design method for outer packaging steel structure according to claim 1, characterized in that: The naming method follows the format of "layer number-unit type-number".

8. A three-dimensional integrated design method for an outer packaging steel structure as claimed in claim 1, characterized in that: By setting up the Link_TS_Midas data interface to check and adjust the parameters related to the preset square tube section name in the TEKLA software, the preset square tube section name is matched with the square tube section name in the MIDAS unit calculation model.

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