Rotary curtain wall parameterization design method based on BIM

Abstract

The invention provides a rotating type curtain wall parameterization design method based on BIM, relates to the technical field of curtain wall design, and can reasonably control the outer contour of a rotating type curtain wall, fully combine a glass curtain wall with an aluminum plate curtain wall, adjust according to a required angle, and simulate an outdoor environment through software to achieve a required light receiving rate. During on-site construction, construction nodes are determined through the model, the process is optimized at the joint, and on-site construction is efficiently assisted.

Description

Technical Field

[0001] The present invention relates to the technical field of curtain wall design, and in particular to a BIM-based parametric design method for a rotary curtain wall. Background Art

[0002] Curtain wall is the outer wall of a building. It is non-load-bearing and is hung like a curtain, so it is also called "curtain wall". It is a lightweight wall with decorative effect commonly used in modern large and high-rise buildings. In existing designs, in order to make the building a landmark building in the local area, such as in the design of stadiums, libraries and other buildings, the design of its appearance is often innovative. In particular, the curtain wall set on the outside of the building adopts a design with multiple curves and curved surfaces, which greatly increases the difficulty of manufacturing and construction.

[0003] The exterior facade of this project is a combination of rotating aluminum panels and glass curtain walls. The size of each aluminum panel curtain wall is different, and the exterior facade is very complex. This curtain wall can no longer be constructed using traditional techniques. The project system integration studies a parametric design method for rotating curtain walls based on BIM, accurately positioning the curved building curtain wall, and solving engineering difficulties such as complex curved surface modeling and high operational difficulty. Summary of the invention

[0004] In order to solve the above problems, the present invention discloses a BIM-based parametric design method for a rotary curtain wall, comprising the following steps: S1. Design curtain wall profile: S11, setting the overall inclination angle α of the curtain wall; S12. Use the "Curve" command in AutoCAD to form a regular smooth reference curve, then import it into Rhino and use the "Rebuild Curve" command to generate the building shape control boundary curve, and then use the Rhino "Curve Lofting" command to generate the building shape reference surface; S13. Import the building boundary control curve into AutoCAD, and then divide the curve into equal parts using the "curve equalization" command, and use the equally divided curve as the curtain wall unit; S2. Curtain wall unit design: The left and right sides of the curtain wall unit are the aluminum plate area and the glass area respectively. The proportion of the aluminum plate area and the glass area is controlled according to the position of the curtain wall unit; S3, modeling and rendering: S31. In Rhino, use the "Copy" and "Move" commands to arrange several curtain wall units in order to form a facade curtain wall unit component group, then use the "Rectangular Surface" command to create a base surface, and then use the "Surface Flow" command to flow the curtain wall unit group to the previously created building form target surface to form a building form with curtain wall units, and complete the modeling; S32. Deepen the building plane in combination with the model skin outline, and model other areas of the building, such as the entrance, canopy, fifth facade of the roof, etc., to form the final building form; S33. The final building shape is rendered.

[0005] Preferably, the inclination angle α is 10°.

[0006] Preferably, the curve in S13 is divided into 92 equal segments.

[0007] Preferably, the height×width×thickness of the curtain wall unit is 26.1×3×0.35m.

[0008] Preferably, the curtain wall units are divided into four types, and the width ratios of the aluminum plate area and the glass area are as follows: curtain wall unit one, 900:2100mm; curtain wall unit two, 1300:1700mm; curtain wall unit three, 1700:1300mm; curtain wall unit four, 2100:900mm, which reduces the number of non-standard curtain wall units while ensuring that the building facade has a gradual shaping effect.

[0009] Preferably, the curtain wall as a whole has a circular outline when viewed from above, and is marked with A and B on both sides, and there are four equal sections between A and B, and each section is respectively arranged with curtain wall unit 4, curtain wall unit 3, curtain wall unit 2 and curtain wall unit 1. The gradual form of the curtain wall facade unit is designed in combination with the internal functions while the shape design. The design logic is that the aluminum plate of the curtain wall unit close to the backstage part accounts for a larger area, and the glass accounts for a smaller area. The glass accounts for the largest area and the aluminum plate accounts for the smallest area of ​​the facade curtain wall close to the lobby part with a greater demand for daylighting, so the above curtain wall unit design and arrangement are carried out.

[0010] The beneficial effects of the present invention are as follows: it is a new construction method that combines design and construction. Through software parameterized control, it can reasonably adjust the shape of the aluminum plate, optimize on-site node construction, reduce the production of samples, effectively reduce material waste, and solve the problems of inaccurate installation positioning, uneven finish, and wave reflection in traditional processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a design flow chart of the present invention; Figure 2 It is a schematic diagram of the bottom structure of the curtain wall of the present invention; Figure 3 A schematic diagram of a control boundary curve for generating a building form according to the present invention; Figure 4 A schematic diagram of a reference curved surface for generating a building form according to the present invention; Figure 5A top view of the overall outline of the building of the present invention; Figure 6 A top view of a local outline of a building of the present invention; Figure 7 It is a schematic diagram of the unfolding of the curtain wall unit of the present invention on the facade; Figure 8 is a horizontal cross-sectional schematic diagram of a curtain wall unit of the present invention; Fig. 9 The architectural model diagram of the present invention; Fig.10 This is a rendering of the building of the present invention.

[0012] List of reference numerals: 1. Curtain wall unit 1; 2. Curtain wall unit 2; 3. Curtain wall unit 3; 4. Curtain wall unit 4; Ⅰ. Curtain wall as a whole; Ⅰ-1. Aluminum plate area; Ⅰ-2. Glass area. DETAILED DESCRIPTION

[0013] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0014] A parametric design method for rotating curtain walls based on BIM, such as Figure 1 As shown, the following steps are included: S1. Design curtain wall profile: S11, such as Figure 2 As shown, the inclination angle α of the curtain wall as a whole is set; S12. Use the "Curve" command in AutoCAD to form a regular smooth reference curve, then import it into Rhino and use the "Rebuild Curve" command to generate the building shape control boundary curve, such as Figure 3 As shown, the building body reference surface is generated through the Rhino "Curve Lofting" command, as shown Figure 4 As shown; S13. Import the building boundary control curve into AutoCAD, and then divide the curve into equal parts using the "curve equalization" command. Figure 5 and Figure 6 As shown, the equally divided curve is taken as the curtain wall unit, which means that one curtain wall unit is installed on each equally divided curve; S2. Curtain wall unit design: The left and right sides of the curtain wall unit are the aluminum plate area Ⅰ-1 and the glass area Ⅰ-2 respectively. Figure 8As shown, the curtain wall unit is bent to meet the shape of the curved surface of the building. The proportion of the aluminum plate area Ⅰ-1 and the glass area Ⅰ-2 is controlled according to the position of the curtain wall unit. Since different locations of the building require different lighting, the proportion of the aluminum plate area Ⅰ-1 and the glass area Ⅰ-2 in the curtain wall unit can be adjusted. However, the types of curtain wall units produced should not be too many, otherwise multiple specifications need to be produced in subsequent production and manufacturing, which increases the difficulty of production; S3, modeling and rendering: S31. In Rhino, use the "Copy" and "Move" commands to arrange several curtain wall units in order to form a facade curtain wall unit component group, then use the "Rectangular Surface" command to create a base surface, and then use the "Surface Flow" command to flow the curtain wall unit group to the previously created building form target surface to form a building form with curtain wall units. The modeling is completed, that is, the overall curtain wall I modeling is realized; S32. The architectural plane is deepened in combination with the model skin contour, and other areas of the building are modeled, such as the entrance, canopy, roof, and fifth facade. The details of the building are perfected to form the final architectural form, such as Fig. 9 As shown; S33, the final building shape is rendered, such as Fig.10 As shown, in this modeling method, the light is reflected evenly, making the building natural.

[0015] The inclination angle α is 10°. The inclination angle set here is 10°. In other types of buildings, it can be reselected according to material strength, building appearance, etc.

[0016] The curve in S13 is divided into 92 equal segments, that is, the curtain wall as a whole Ⅰ is divided into 92 curtain wall units.

[0017] The height × width × thickness of the curtain wall unit is 26.1 × 3 × 0.35m, which is the size of the curtain wall unit.

[0018] By dividing the curves to form the construction scale of the standard unit, the curtain wall unit and window size that are easy to construct are formed. At the same time, the structural thickness of the curtain wall must meet the construction needs, as well as the scale and position of the curtain wall unit window. The gradual form of the curtain wall facade unit is designed in combination with the internal functions during the shape design. The design logic is that the aluminum plate of the curtain wall unit close to the backstage accounts for a larger area, and the glass accounts for a smaller area. The glass accounts for the largest area and the aluminum plate accounts for the smallest area of ​​the facade curtain wall close to the lobby, which has a greater demand for daylighting. The specific design is as follows.

[0019] There are four types of curtain wall units, and the width ratio of the aluminum plate area Ⅰ-1 and the glass area Ⅰ-2 is as follows: curtain wall unit 1, 900: 2100mm; curtain wall unit 2, 1300: 1700mm; curtain wall unit 3, 1700: 1300mm; curtain wall unit 4, 2100: 900mm. Four types of curtain wall units are set here to meet the needs of building shape, so that the types of curtain wall units are relatively few, which is conducive to its production and installation.

[0020] Combination Figure 5 and Figure 7 As shown, the curtain wall as a whole Ⅰ is a circular outline when viewed from above, and A and B are marked on both sides. There are four equal sections between A and B, and each section is arranged with curtain wall unit 4 4, curtain wall unit 3 3, curtain wall unit 2 2 and curtain wall unit 1 1. It should be noted here that the circular outline has two routes from A to B, and the arrangement of the two routes is the same as Figure 7 Consistent, that is Figure 7 The curtain wall units on both sides of A are symmetrical.

[0021] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above technical features.

Claims

1. A parametric design method for a rotating curtain wall based on BIM, characterized in that: The following steps are involved: S1. Design curtain wall profile: S11. Set the inclination angle α of the entire curtain wall (Ⅰ); S12. Use the "Curve" command in AutoCAD to form a regular smooth reference curve, then import it into Rhino and use the "Rebuild Curve" command to generate the building shape control boundary curve, and then use the Rhino "Curve Lofting" command to generate the building shape reference surface; S13. Import the building boundary control curve into AutoCAD, and then divide the curve into equal parts using the "curve equalization" command, and use the equally divided curve as the curtain wall unit; S2. Curtain wall unit design: The left and right sides of the curtain wall unit are the aluminum plate area (Ⅰ-1) and the glass area (Ⅰ-2). The proportion of the aluminum plate area (Ⅰ-1) and the glass area (Ⅰ-2) is controlled according to the position of the curtain wall unit. S3, modeling and rendering: S31. In Rhino, use the "Copy" and "Move" commands to arrange several curtain wall units in order to form a facade curtain wall unit component group, then use the "Rectangular Surface" command to create a base surface, and then use the "Surface Flow" command to flow the curtain wall unit group to the previously created building form target surface to form a building form with curtain wall units, and complete the modeling; S32. Deepen the building plane in combination with the model surface contour, and model other areas of the building to form the final building form; S33. The final building shape is rendered.

2. The BIM-based parametric design method for a rotary curtain wall according to claim 1, characterized in that: The inclination angle α is 10°.

3. The BIM-based parametric design method for a rotary curtain wall according to claim 1, characterized in that: The curve in S13 is equally divided into 92 segments.

4. The BIM-based parametric design method for a rotary curtain wall according to claim 1, characterized in that: The height×width×thickness of the curtain wall unit is 26.1×3×0.35m.

5. The BIM-based parametric design method for a rotary curtain wall according to claim 4 is characterized in that: The curtain wall units are divided into four types, and the width ratios of the aluminum plate area (Ⅰ-1) and the glass area (Ⅰ-2) are as follows: curtain wall unit one (1), 900:2100mm; curtain wall unit two (2), 1300:1700mm; curtain wall unit three (3), 1700:1300mm; curtain wall unit four (4), 2100:900mm.

6. The BIM-based parametric design method for a rotary curtain wall according to claim 5, characterized in that: The curtain wall as a whole (I) is a circular outline when viewed from above, and is marked with A and B on both sides. There are four equal sections between A and B, and each section is arranged with curtain wall unit four (4), curtain wall unit three (3), curtain wall unit two (2) and curtain wall unit one (1).

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