A curved grid modeling structure and a method for manufacturing a torsion node thereof

Abstract

The present invention relates to a curved grid modeling structure and a method for manufacturing a torsion node thereof, comprising a connecting rod and a torsion node, wherein the connecting rod is a straight box with a rectangular cross section, the torsion node comprises a main torsion box and a box-shaped bracket, a box-shaped bracket is connected to opposite sides of the main torsion box to form an X-shaped structure, and the two ends of the main torsion box and the box-shaped brackets on both sides form four legs of the torsion node; the box-shaped bracket is a straight box with a rectangular cross section, the main torsion box comprises an end plate and four torsion plates with bending and torsion, the four torsion plates are spliced ​​to form a box-shaped structure with a rectangular cross section, the end plate closes an open end of the box-shaped structure, and the other end of the box-shaped structure is open, the connecting rod is fixedly connected to the legs of the torsion node to form a curved grid modeling structure. The present invention utilizes the torsion node to achieve the conversion of curvature, thereby ensuring the installation accuracy of the curved grid, reducing the difficulty of assembly, achieving the effective transmission of force in the node, and ensuring the stress safety of the structure.

Description

Technical Field

[0001] The present invention relates to the field of prefabricated steel structure buildings, and in particular to a curved grid modeling structure and a method for manufacturing a torsion node thereof. Background Art

[0002] As steel structures mature, many shapes within the construction industry become increasingly challenging, and the advantages of steel structures become increasingly apparent. In particular, concrete cannot match the ability to create curved and torsional shapes. During construction, some iconic city buildings or cultural and artistic structures often utilize curved steel structures, creating a multi-tube intersecting curved grid structure, driven by both structural functionality and aesthetics.

[0003] In a curved grid structure, the nodes connecting the various rods bear the internal forces transmitted by the various rods. The stress state of the nodes is relatively complex, and the design requires strong nodes and weak components. For a curved grid structure with a box section, the box section rods connected to the nodes are usually made into components with torsion in the prior art, and the curved grid shape is achieved by connecting nodes without bending and torsion. However, in the actual construction process, the box section rods are relatively long and are assembled by multiple plates with bending and torsion. The processing of large-sized bending and torsion plates is difficult and requires high technical requirements. The bending and torsion forming accuracy of the plates is directly affected by the processing accuracy and installation accuracy of the torsion components. The construction of bending and torsion components is different from that of general conventional components. It is necessary to assemble and weld the bending and torsion positions in the spatial position. The construction and production are difficult. It is difficult to ensure the assembly accuracy through ordinary conventional methods. Large-scale welding will cause welding deformation, thereby affecting the accuracy of the curved shape after assembly. Summary of the Invention

[0004] The present invention first discloses a curved grid modeling structure, which realizes the curved grid modeling by connecting the torsion nodes of the X-shaped structure with the straight box connecting rods. It not only meets the requirements of personalized architectural modeling design, but also realizes the effective transmission of force in the nodes, ensuring the stress safety of the structure.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A curved grid modeling structure includes a connecting rod and a torsion node. The connecting rod is a straight box with a rectangular cross-section. The torsion node includes a main torsion box and a box-type corbel. A box-type corbel is connected to each of the opposite sides of the main torsion box to form an X-shaped structure. The two ends of the main torsion box and the box-type corbels on both sides form four legs of the torsion node. The box-type corbel is a straight box with a rectangular cross-section. The main torsion box includes an end plate and four torsion plates with bending and torsion. The four torsion plates are spliced ​​to form a box-type structure with a rectangular cross-section. The end plate closes an open end of the box-type structure, and the other end of the box-type structure is open. The connecting rod is fixedly connected to the legs of the torsion node to form a curved grid modeling structure.

[0007] Furthermore, the curved grid structure further includes a top ring beam, which is a straight box with a rectangular cross-section, and a connecting rod close to the top ring beam is fixedly connected to the top ring beam.

[0008] Furthermore, the box-shaped corbel is non-vertically connected to the main torsion box, the box-shaped corbels on both sides of the main torsion box are located on the same center line, the grid in the curved grid modeling structure is a rhombus, and the two symmetry axes of the rhombus are not equal in length.

[0009] Furthermore, a stiffening plate is provided inside the main torsion box, and the stiffening plate includes a first stiffening plate and a second stiffening plate arranged in parallel at intervals, the first stiffening plate is parallel to one side wall of the box-type corbel, and the second stiffening plate is parallel to the other side wall of the box-type corbel.

[0010] Furthermore, the end plate is a flat plate, and the torsion plate is divided into a first torsion plate and a second torsion plate opposite to each other on the left and right, and a third torsion plate and a fourth torsion plate opposite to each other on the top and bottom. The width of the first torsion plate and the second torsion plate is greater than that of the third torsion plate and the fourth torsion plate.

[0011] Furthermore, the third torsion plate and the fourth torsion plate are both bent once to form a required bending torsion, and the first torsion plate and the second torsion plate are both bent five times to form a required bending torsion.

[0012] Furthermore, the bending line on the third torsion plate in the torsion node coincides with the bending line on the fourth torsion plate in the upper and lower parts. The bending line on the first torsion plate in the torsion node is divided into a first bending line, a second bending line, a third bending line, a fourth bending line, and a fifth bending line connected end to end. The first bending line, the third bending line, and the fifth bending line are spaced apart from each other and are parallel to the edge line of the end face of the first torsion plate in the width direction. After the first torsion plate is rotated 180° along the center line parallel to the width direction of the first torsion plate, its bending line is opposite to and coincides with the bending line on the second torsion plate.

[0013] Furthermore, the distance between the first bending line and the third bending line is greater than the distance between the third bending line and the fifth bending line. The bending directions of the first bending line, the third bending line and the fifth bending line are the same, the bending directions of the second bending line and the fourth bending line are the same, and the bending directions of the second bending line and the first bending line are opposite.

[0014] The present invention also discloses a method for manufacturing a torsion node in the above-mentioned curved mesh structure, which specifically includes the following contents:

[0015] Step 1: Construct a torsion node model. In the model, each torsion plate on the main torsion box of the torsion node is split into multiple polygonal plates according to the bending line, and the preset bending and torsion of each torsion plate is achieved through fitting.

[0016] Step 2: After fitting, the corresponding polygonal plates are assembled along the bending lines to form the corresponding torsion plates. Each torsion plate is unfolded, and then the bending lines are drawn on the unfolded drawing of the torsion plate. The bending angles are marked at the bending lines, and the torsion dimension values ​​are marked at the ends of each bending line. Finally, the processing drawings are output;

[0017] Step 3: Cut and bend the panels according to the processing drawings;

[0018] Step 4: Set up the tire frame according to the torsion value marked on the processing drawing, and place the bent torsion plate on the tire frame for dimensional inspection;

[0019] Step 5: Create corresponding grooves on each plate according to the weld;

[0020] Step 6: Place the ground sample according to the drawing size of the torsion node, and set up the node frame according to the size of the ground sample;

[0021] Step 7: Assemble the panels in sequence according to the projection size and tire frame.

[0022] The curved grid structure designed by the present invention can meet the personalized design requirements in steel structure buildings. The curved grid structure uses torsion nodes to achieve the conversion of curvature, rather than the existing technology of bending and torsion processing of connecting rods. It can ensure the installation accuracy of the curved grid structure and reduce the difficulty of assembly. The designed torsion nodes realize the effective transmission of force in the nodes and ensure the force safety of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of a curved mesh modeling structure in an embodiment;

[0024] Figure 2 for Figure 1 Schematic diagram of the structure of the torsion node;

[0025] Figure 3 for Figure 2Exploded diagram;

[0026] Figure 4 A comparison diagram of the bending lines of the first torsion plate and the second torsion plate in the torsion node;

[0027] Figure 5 A perspective view of the twisted node;

[0028] Figure 6 A schematic diagram showing the bending angle and torsion value in the drawing of the first torsion plate or the second torsion plate in the torsion node;

[0029] Figure 7 It is a cross-sectional view of the bending line of the third torsion plate or the fourth torsion plate in the torsion node.

[0030] Description of reference numerals:

[0031] 100, top ring beam; 200, connecting rod; 300, torsion node;

[0032] 301, main torsion box; 302, first box-type bracket; 303, second box-type bracket;

[0033] 3011, first torsion plate; 3012, second torsion plate; 3013, third torsion plate; 3014, fourth torsion plate;

[0034] 3015, end plate; 3016, first stiffening plate; 3017, second stiffening plate;

[0035] 3011a~3011e are five bending lines on the first torsion plate; 3012a~3012e are five bending lines on the second torsion plate; 3013a is the bending line on the third torsion plate; 3014a is the bending line on the fourth torsion plate. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0037] This embodiment first discloses a curved grid modeling structure used in steel structure buildings, such as Figure 1 As shown, the curved grid structure is mainly assembled by a top ring beam 100, a connecting rod 200, and a torsion node 300, forming a curved surface shape with a diamond grid shape.

[0038] The connecting rod 200 is a rectangular box-shaped structure, constructed by sequentially welding four flat steel plates. The top ring beam 100 is also a rectangular box-shaped structure, constructed by sequentially welding four steel plates. The top ends of the connecting rods 200 near the top ring beam 100 in the curved grid structure are fixedly connected to the top ring beam 100. Adjacent connecting rods 200 are connected by torsion nodes 300 to form a grid.

[0039] Figure 1 The surface mesh modeling structure shown in FIG, the torsion node 300 is an important node for realizing the surface degree conversion, and the torsion node 300 structure is as follows Figure 2 and Figure 3 As shown, the torsion node 300 includes a main torsion box 301 with a rectangular cross-section, a first box-type corbel 302, and a second box-type corbel 303. The first box-type corbel 302 and the second box-type corbel 303 are both straight boxes with rectangular cross-sections and can be welded from four flat steel plates. The first box-type corbel 302 and the second box-type corbel 303 are respectively arranged on both sides of the main torsion box 301. The two box-type corbels are located on the same center line and are both fixedly connected to the main torsion box 301 to form an X-shaped structure. The torsion node 300 in this embodiment has four legs, two of which are formed by the ends of the box-type corbels, and the other two legs are formed by the ends of the main torsion box 301. The four legs formed are used to connect with the connecting rod 200.

[0040] Furthermore, in this embodiment, the box-shaped corbel is non-vertically connected to the main torsion box 301, so that the mesh in the curved mesh structure formed thereby is a rhombus, and the two symmetry axes of the rhombus are not equal in length, thereby improving the aesthetics of the shape.

[0041] like Figure 3 As shown, the main torsion box 301 mentioned above mainly includes an end plate 3015, a first torsion plate 3011, a second torsion plate 3012, a third torsion plate 3013, a fourth torsion plate 3014, a first stiffening plate 3016, and a second stiffening plate 3017. The end plate 3015 is a flat plate and does not have bending and torsion, while the four torsion plates all have bending and torsion. The four torsion plates are spliced ​​in sequence to form a box structure with a rectangular cross-section. The end plate 3015 closes one end of the box structure, so that only one end of the box structure is an open end. The first stiffening plate 3016 and the second stiffening plate 3017 are arranged in parallel at a certain distance inside the box structure, and are located at the connection between the box-type corbels. As shown Figure 5 As shown, the first stiffening plate 3016 is parallel to one side wall of the box-type corbel, and the second stiffening plate 3017 is parallel to the other side wall of the box-type corbel.

[0042] More specifically, Figure 3The direction shown is for reference only. The first torsion plate 3011 is opposite to the second torsion plate 3012, and the third torsion plate 3013 and the fourth torsion plate 3014 are opposite to each other. In addition, the width of the first torsion plate 3011 and the second torsion plate 3012 is the same and greater than the width of the third torsion plate 3013 and the fourth torsion plate 3014. The four torsion plates are all bent to form a structure that meets the design requirements for bending and torsion. Figure 7 As shown, the third torsion plate 3013 and the fourth torsion plate 3014 are both bent once to form a required bending degree, and the bending directions of the two are the same; Figure 6 As shown, the first torsion plate 3011 and the second torsion plate 3012 are both bent five times to form the required bending torsion. Figure 6 The lines in the plate shown in are the corresponding bending lines.

[0043] To ensure that the box formed by assembling the four torsion plates has a rectangular cross-section, the bending line 3013a of the third torsion plate 3013 and the bending line 3014a of the fourth torsion plate 3014 are vertically aligned; after the first torsion plate 3011 is horizontally rotated 180° along the center line parallel to the width direction of the first torsion plate 3011 (perpendicular to the direction of the third torsion plate 3013), the bending line on the first torsion plate 3011 and the bending line on the second torsion plate 3012 are exactly opposite and aligned. Figure 4 As shown, the five bending lines on the first torsion plate 3011 are the first bending line 3011a, the second bending line 3011b, the third bending line 3011c, the fourth bending line 3011d, and the fifth bending line 3011e; the five bending lines on the second torsion plate 3012 are the first bending line 3012a, the second bending line 3012b, the third bending line 3012c, the fourth bending line 3012d, and the fifth bending line 3012e.

[0044] Taking the first torsion plate 3011 as an example, the first bending line 3011a, the third bending line 3011c, and the fifth bending line 3011e are spaced apart from each other and are parallel to the edge line of the end face in the width direction of the first torsion plate 3011. Specifically, the distance between the first bending line 3011a and the third bending line 3011c is greater than the distance between the third bending line 3011c and the fifth bending line 3011e. Figure 6 It can be seen from the bending angles marked on the bending lines that, during bending, the first bending line 3011a, the third bending line 3011c and the fifth bending line 3011e are made to have the same bending directions, and the second bending line 3011b and the fourth bending line 3011d are made to have the same bending directions, wherein the second bending line 3011b is opposite to the first bending line 3011a, thereby forming a certain curvature.

[0045] Regarding the torsion node in the above-mentioned curved mesh modeling structure, this embodiment also provides a method for making the torsion node, which specifically includes the following contents:

[0046] Step 1: Construct a torsion node model, such as using Tekla design software. This 3D model automatically generates steel structure processing drawings. In this constructed model, the plates of the torsion node's main torsion box 301 are split. Each torsion plate is split into multiple polygonal plates along the bend lines. Fitting is then performed to achieve the preset bending and torsion of each torsion plate, ensuring that the dimensions of both ends meet the torsion requirements.

[0047] Step 2: After fitting, the corresponding polygonal plates are merged into a single torsion plate along the bending lines. The actual processing process involves bending the entire plate. The merged torsion plate is unfolded in the model to facilitate cutting to the desired size using a CNC cutting machine during processing. The bending lines should be drawn on the torsion plate's unfolded drawing, and the bending angles should be marked at the bending lines to facilitate bending using a CNC bending machine. The torsion dimension should also be marked at the end of each bending line on the unfolded drawing to facilitate dimensional verification. Finally, the processing drawings are printed.

[0048] Step 3: In actual processing, first cut the plate according to the processing drawing, and then bend and twist the plate according to the bending lines marked in the processing drawing.

[0049] Step 4: After completing the bending and twisting of the plate, set up the tire frame according to the twist value marked on the processing drawing, and place the bent and twisted plate on the tire frame for dimensional inspection.

[0050] Step 5: Create corresponding grooves on each plate according to the weld.

[0051] Step 6: Place the ground sample according to the drawing size of the torsion node, and set up the node frame according to the size of the ground sample.

[0052] Step 7: According to the projection size and the tire frame, assemble the panels in sequence to form a torsion node.

[0053] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A curved grid modeling structure, characterized by: The torsion node comprises a connecting rod and a torsion node, wherein the connecting rod is a straight box with a rectangular cross-section, and the torsion node comprises a main torsion box and a box-type corbel, wherein two opposite sides of the main torsion box are connected to a box-type corbel to form an X-shaped structure, and the two ends of the main torsion box and the box-type corbels on both sides form four legs of the torsion node; the box-type corbel is a straight box with a rectangular cross-section, and the main torsion box comprises an end plate and four torsion plates with bending and torsion, and the four torsion plates are spliced ​​to form a box-shaped structure with a rectangular cross-section, and the end plate closes an open end of the box-shaped structure, and the other end of the box-shaped structure is open, and the connecting rod is fixedly connected to the legs of the torsion node to form a curved grid structure; The end plate is a flat plate, and the torsion plate is divided into a first torsion plate and a second torsion plate opposite to each other on the left and right, and a third torsion plate and a fourth torsion plate opposite to each other on the top and bottom. The width of the first torsion plate and the second torsion plate is greater than the width of the third torsion plate and the fourth torsion plate; The third torsion plate and the fourth torsion plate are both bent once to form a bending torsion that meets the requirements, and the first torsion plate and the second torsion plate are both bent five times to form a bending torsion that meets the requirements; The bending line on the third torsion plate in the torsion node coincides with the bending line on the fourth torsion plate in the upper and lower parts. The bending line on the first torsion plate in the torsion node is divided into a first bending line, a second bending line, a third bending line, a fourth bending line, and a fifth bending line connected end to end. The first bending line, the third bending line, and the fifth bending line are spaced apart from each other and are parallel to the edge line of the end face of the first torsion plate in the width direction. After the first torsion plate is rotated 180° along the center line parallel to the width direction of the first torsion plate, its bending line is opposite to and coincides with the bending line on the second torsion plate.

2. The curved grid modeling structure according to claim 1, characterized in that: The curved grid structure further comprises a top ring beam, which is a straight box body with a rectangular cross section, and a connecting rod close to the top ring beam is fixedly connected to the top ring beam.

3. The curved grid modeling structure according to claim 1, characterized in that: The box-shaped bracket is non-vertically connected to the main torsion box, and the box-shaped brackets on both sides of the main torsion box are located on the same center line. The grid in the curved grid modeling structure is a rhombus, and the two symmetry axes of the rhombus are unequal in length.

4. The curved grid modeling structure according to claim 3, characterized in that: A stiffening plate is provided inside the main torsion box, and the stiffening plate includes a first stiffening plate and a second stiffening plate arranged in parallel at intervals. The first stiffening plate is parallel to one side wall of the box-shaped corbel, and the second stiffening plate is parallel to the other side wall of the box-shaped corbel.

5. The curved grid modeling structure according to claim 1, characterized in that: The distance between the first bending line and the third bending line is greater than the distance between the third bending line and the fifth bending line. The bending directions of the first bending line, the third bending line and the fifth bending line are the same, the bending directions of the second bending line and the fourth bending line are the same, and the bending directions of the second bending line are opposite to those of the first bending line.

6. A method for producing a torsion node in a curved mesh structure according to any one of claims 1 to 5, characterized in that: Includes the following: Step 1: Construct a torsion node model. In the model, each torsion plate on the main torsion box of the torsion node is split into multiple polygonal plates according to the bending line, and the preset bending and torsion of each torsion plate is achieved through fitting. Step 2: After fitting, the corresponding polygonal plates are assembled along the bending lines to form the corresponding torsion plates. Each torsion plate is unfolded, and then the bending lines are drawn on the unfolded drawing of the torsion plate. The bending angles are marked at the bending lines, and the torsion dimension values ​​are marked at the ends of each bending line. Finally, the processing drawings are output; Step 3: Cut and bend the panels according to the processing drawings; Step 4: Set up the tire frame according to the torsion value marked on the processing drawing, and place the bent torsion plate on the tire frame for dimensional inspection; Step 5: Create corresponding grooves on each plate according to the weld; Step 6: Place the ground sample according to the drawing size of the torsion node, and set up the node frame according to the size of the ground sample; Step 7: Assemble the panels in sequence according to the projection size and tire frame.

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