Manufacturing method of arc-shaped steel pipe column and box-shaped ring beam conversion joint

Abstract

The application discloses a manufacturing method of an arc-shaped steel pipe column and box-type ring beam conversion joint, and is characterized in part by the following steps: first, modeling the conversion joint; marking the high and low positioning points on the upper and lower openings of the arc-shaped steel pipe; taking the lower plane of the ring beam as a horizontal projection plane and a ground sample reference plane; equally dividing the lower opening of the arc-shaped steel pipe into four parts and drawing a perpendicular line to the projection plane to mark the position; manufacturing a positioning control jig according to the marked position and marking the positioning points on the positioning control jig; installing the arc-shaped steel pipe on the positioning control jig according to the design requirements and sticking and fixing the arc-shaped steel pipe; checking and measuring the center point of the upper opening of the pipe and fixing the arc-shaped steel pipe; installing a door-shaped jig frame at the lower plane of the box-type ring beam, placing the conversion joint on the door-shaped jig frame, checking and adjusting the position, and welding and fixing the conversion joint. Compared with the prior art, the method reduces the manufacturing difficulty of the arc-shaped steel pipe column and box-type ring beam conversion joint, makes the construction method simpler to operate, and improves the manufacturing efficiency and precision of the arc-shaped steel pipe column and box-type ring beam conversion joint.

Description

Technical Field

[0001] This invention relates to the field of building steel structure technology, and in particular to a method for manufacturing a transition node between an arc-shaped steel pipe column and a box-type ring beam. Background Technology

[0002] In common public buildings, stadiums, and high-rise residential buildings, the connection between steel pipe columns and ring beams involves a large steel column cross-section and a small ring beam cross-section. A short section of the beam is broken off at the end and welded to the steel pipe as a corbel, connecting the ring beam and the steel pipe column at the corbel joint. In actual construction, to meet structural requirements, the ring beam cross-section needs to be larger, while the steel pipe cross-section needs to be smaller. To ensure the overall stress stability of the steel column, two steel pipes need to be made into an arc shape and pass through the middle of the ring beam, forming a transition node connecting the steel pipe and the ring beam. Due to the complexity of this node structure and the difficulty in dimensional control, errors are easily introduced during the manufacturing process, making it difficult to meet design requirements. Therefore, there is an urgent need to develop a method for manufacturing an arc-shaped steel pipe column and box-type ring beam transition node. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a method for fabricating a transition node between an arc-shaped steel pipe column and a box-type ring beam, which simplifies and facilitates construction, and improves the fabrication efficiency and accuracy of the transition node.

[0004] To achieve this technical objective, the present invention adopts the following solution: This invention provides a method for fabricating a transition node between an arc-shaped steel pipe column and a box-type ring beam, comprising the following steps: Step 1: First, use computer modeling to draw the 3D model of the steel pipe column and box-type ring beam transition node according to the dimensions in the drawings using drafting software, such as CAD. The steel pipe column and box-type ring beam transition node (hereinafter referred to as the transition node) includes the box-type ring beam and the arc-shaped steel pipe. The arc-shaped steel pipe includes a first arc-shaped steel pipe and a second arc-shaped steel pipe. Both the first and second arc-shaped steel pipes penetrate the box-type ring beam and are set at an angle to the box-type ring beam. An intersecting pipe is set between the first and second arc-shaped steel pipes.

[0005] Step 2: Draw the high and low points of the upper and lower ends of the arc-shaped steel pipe, and draw a semicircle with R=5mm as a positioning mark. Mark the coordinates of each positioning point on the upper end of the arc-shaped steel pipe and the coordinates of the center point of the upper end of the pipe.

[0006] Step 3: Using the lower plane of the box girder as the plane, construct the horizontal projection plane of the girder, and use the horizontal projection plane of the girder as the reference plane for the ground sample.

[0007] Step 4: Divide the lower openings of the two arc-shaped steel pipes in the conversion node into four equal parts. Draw perpendicular lines from the four division points of the lower openings to the horizontal projection plane of the ring beam to obtain the position points of the lower openings of the arc-shaped steel pipes on the horizontal projection plane of the ring beam.

[0008] Step 5: Based on the position of the lower end of the arc steel pipe on the horizontal projection plane of the ring beam, make a positioning control jig for the lower end of the pipe. Draw the position lines of the equally divided points of the lower end of the circular pipe on the upper plane of the positioning control jig, and mark the outer contour line of the circular pipe.

[0009] Step Six: Fabricate the arc-shaped steel pipes according to the design requirements of the drawings. Place the two arc-shaped steel pipes on the corresponding positioning control jigs according to the positions shown in the drawings. Align the equal division points at the bottom of the arc-shaped steel pipes with the equal division points and outer contour points drawn on the positioning control jigs, and temporarily fix them with adhesive.

[0010] Step 7: Attach 40mm wide strips to the inner walls of the upper openings of the two arc-shaped steel pipes and mark the center points of the pipe openings. Use a total station to check and measure the center points of the upper openings of the two arc-shaped steel pipes to ensure they match the model coordinate dimensions. Fix the arc-shaped steel pipes to the floor with angle steel and assemble the intersecting pipe between the two arc-shaped steel pipes. Adjust the gap and weld. After welding, repair any welding deformation.

[0011] Step 8: According to the horizontal projection dimension drawing of the ring beam, install and weld the portal frame at the lower plane position of the box-shaped ring beam, ensuring that the upper plane of the portal frame is at the same height as the lower plane of the box-shaped ring beam. Place the box-shaped ring beam on the portal frame, use a plumb line to suspend the ground control points of the box openings at both ends, adjust the assembly position of the box-shaped ring beam, and fix the conversion node after verification.

[0012] Step 9: Weld the box-shaped ring beam to the arc steel pipe. To prevent welding deformation, CO2 gas shielded welding is used in this embodiment. The welding sequence is to first weld the vertical welds on both sides connecting the box-shaped ring beam and the arc steel pipe, and then weld the upper and lower horizontal welds.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: The method of this invention reduces the manufacturing difficulty of the transition node between steel pipe columns and box-type ring beams, makes the construction method simpler and easier, and improves the manufacturing efficiency and accuracy of the transition node between steel pipe columns and box-type ring beams. Attached Figure Description

[0014] Figure 1 This is a three-dimensional modeling diagram of the transition node between the steel pipe column and the box-type ring beam in an embodiment of the present invention; Figure 2 This is a diagram showing the positioning points of the upper and lower openings of the arc-shaped optical tube in an embodiment of the present invention; Figure 3 This is a horizontal projection view of the box-type ring beam in an embodiment of the present invention; Figure 4 This is a positioning diagram of the lower end of the arc-shaped steel pipe on the horizontal projection plane of the ring beam in an embodiment of the present invention; Figure 5This is a diagram of the positioning control fixture for the lower end of the arc-shaped steel pipe in an embodiment of the present invention; Figure 6 This is a schematic diagram of the four equal division points on the positioning control fixture and the outline of the lower opening of the tube in an embodiment of the present invention; Figure 7 This is a schematic diagram of the assembly and positioning of two arc-shaped steel pipes in an embodiment of the present invention; Figure 8 This is a schematic diagram of the total station calibration upper coordinate point in an embodiment of the present invention; Figure 9 This is a schematic diagram of the welding gate-type jig in an embodiment of the present invention; Figure 10 This is a schematic diagram of the assembly conversion node in an embodiment of the present invention; Figure 11 This is a schematic diagram of the welding sequence of the assembly conversion node in an embodiment of the present invention; The markings in the diagram are as follows: 1. Box-type ring beam; 2. Circular arc steel pipe; 21. First circular arc steel pipe; 22. Second circular arc steel pipe; 3. Horizontal projection plane of the ring beam; 4. Positioning point; 5. Center point of the upper opening of the pipe; 6. Positioning control jig; 7. Wide strip; 8. Intersecting pipe; 9. Portal jig; 10. Plumb line; 11. Small prism for total station measurement; 12. Vertical weld; 13. Horizontal weld. Detailed Implementation

[0015] To fully understand the purpose, features and effects of the present invention, the present invention will be described in detail through the following specific embodiments, but the present invention is not limited thereto.

[0016] See Figures 1 to 10 This invention provides a method for fabricating a transition node between an arc-shaped steel pipe column and a box-type ring beam, comprising the following steps: Step 1: First, using computer modeling, draw the 3D model of the steel pipe column and box girder transition node to be manufactured in drafting software according to the dimensions of the drawings. In this application, CAD is used for drawing. See [link to relevant documentation]. Figure 1 The steel pipe column and box-type ring beam transition node (hereinafter referred to as the transition node) includes a box-type ring beam 1 and an arc steel pipe 2. The arc steel pipe 2 includes a first arc steel pipe 21 and a second arc steel pipe 22. Both the first arc steel pipe 21 and the second arc steel pipe 22 penetrate the box-type ring beam 1 and are set at an angle to the box-type ring beam 1. An intersecting pipe 8 is provided between the first arc steel pipe 21 and the second arc steel pipe 22.

[0017] Step 2: Draw the high and low points (positioning point 4) at the top and bottom of the arc-shaped steel pipe 2, and draw a semicircular arc with R=5mm as a positioning mark. See [link / reference]. Figure 2 Mark the coordinates of each positioning point 4 at the top of the arc-shaped steel pipe 2, as well as the coordinates of the center point 5 at the top of the pipe.

[0018] Step 3: Using the lower plane of the box girder 1 as the plane, construct the horizontal projection plane 3 of the girder. Use the horizontal projection plane 3 of the girder as the reference plane for the ground sample. (See [reference]) Figure 3 .

[0019] Step 4: Divide the lower openings of the two arc-shaped steel pipes 2 in the conversion node into four equal parts. Draw perpendicular lines from each of these four division points to the horizontal projection plane 3 of the ring beam to obtain the position points of the lower openings of the arc-shaped steel pipes 2 on the horizontal projection plane 3 of the ring beam. (See [link to relevant documentation]). Figure 4 .

[0020] Step 5: Based on the position of the lower opening of the arc-shaped steel pipe 2 on the horizontal projection plane 3 of the ring beam, construct a positioning control jig 6 for the lower opening of the pipe. Draw the position lines of the equally spaced points of the lower opening of the circular pipe on the upper plane of the positioning control jig 6, and mark the outer contour line of the circular pipe. (See...) Figure 5 and Figure 6 .

[0021] Step Six: Fabricate the arc-shaped steel pipes 2 according to the design requirements of the drawings. Place the two arc-shaped steel pipes 2 on the corresponding positioning control jigs 6 according to the positions shown in the drawings. Align the equal division points of the lower opening of the arc-shaped steel pipes 2 with the equal division points and outer contour points drawn on the positioning control jigs 6. Temporarily fix them with adhesive. See [link to documentation]. Figure 7 .

[0022] Step 7: Apply 40mm wide strips 7 to the inner walls of the upper openings of the two arc-shaped steel pipes 2, and mark the center point 5 at the upper opening. Use a total station to check and measure the center point 5 at the upper opening of the two arc-shaped steel pipes 2 to ensure it matches the model coordinate dimensions. Fix the arc-shaped steel pipes 2 to the floor using angle steel, and assemble the intersecting pipe 8 between the two arc-shaped steel pipes 2. Adjust the gap and weld. After welding, repair any welding deformation. See [link / reference] Figure 8 .

[0023] Step 8: According to the layout dimensions of the horizontal projection plane 3 of the ring beam, weld the portal frame 9 to the lower plane of the box-type ring beam 1, ensuring that the upper plane of the portal frame 9 is at the same height as the lower plane of the box-type ring beam 1. Place the box-type ring beam 1 on the portal frame 9, and use a plumb line 10 to suspend the ground control points at both ends of the box-type openings. Adjust the assembly position of the box-type ring beam 1, and after verification, fix the transition node. See [link / reference]. Figure 9 and Figure 10 .

[0024] Step 9: Weld the box-shaped ring beam 1 to the arc steel pipe 2. To prevent welding deformation, CO2 gas shielded welding is used in this embodiment. The welding sequence is to first weld the vertical welds 12 on both sides connecting the box-shaped ring beam 1 and the arc steel pipe 2, and then weld the upper and lower horizontal welds 13.

[0025] The method of this invention reduces the manufacturing difficulty of the transition node between steel pipe columns and box-type ring beams, makes the construction method simpler and easier, and improves the manufacturing efficiency and accuracy of the transition node between steel pipe columns and box-type ring beams.

[0026] Finally, it should be noted that the above-listed embodiments are merely preferred embodiments of the present invention. Of course, those skilled in the art can make modifications and variations to the present invention. If such modifications and variations fall within the scope of the claims of the present invention and their equivalents, they should be considered as being within the protection scope of the present invention.

Claims

1. A method for fabricating a transition node between an arc-shaped steel pipe column and a box-type ring beam, characterized in that, Includes the following steps: Step 1: First, use computer modeling to draw the three-dimensional model of the steel pipe column and box ring beam conversion node to be made in the drawing software according to the dimensions of the drawing; the steel pipe column and box ring beam conversion node includes the box ring beam (1) and the arc steel pipe (2), and the arc steel pipe (2) passes through the box ring beam (1). The arc steel pipe (2) includes a first arc steel pipe (21) and a second arc steel pipe (22). Both the first arc steel pipe (21) and the second arc steel pipe (22) pass through the box-type ring beam (1) and are set at an angle to the box-type ring beam (1). An intersecting pipe (8) is set between the first arc steel pipe (21) and the second arc steel pipe (22). Step 2: Draw the high and low points of the upper and lower openings of the arc steel pipe (2), and mark the coordinates of each positioning point at the upper opening of the arc steel pipe (2) and the coordinates of the center point (5) at the upper opening of the pipe; Step 3: Using the lower plane of the box-shaped ring beam (1) as the plane, construct the horizontal projection plane (3) of the ring beam, and use the horizontal projection plane (3) of the ring beam as the reference plane for the ground sample; Step 4: Divide the lower end of the arc steel pipe (2) in the transition node between the steel pipe column and the box-type ring beam into four equal parts. Draw perpendicular lines from the four division points of the lower end of the pipe to the horizontal projection plane (3) of the ring beam to obtain the position of the lower end of the arc steel pipe (2) on the horizontal projection plane (3) of the ring beam. Step 5: Based on the position of the lower end of the arc steel pipe (2) on the horizontal projection plane (3) of the ring beam, make a positioning control jig (6) for the lower end of the pipe. Draw the position lines of the equal division points of the lower end of the circular tube on the upper plane of the positioning control jig (6), and mark the outer contour line of the circular tube; during installation, align the equal division points of the lower end of the arc steel pipe (2) with the equal division points and outer contour points drawn on the positioning control jig (6); Step 6: Make the arc steel pipe (2) according to the design requirements of the drawing, place the arc steel pipe (2) on the corresponding positioning control jig (6) according to the position of the drawing, and fix it temporarily by spot bonding; Step 7: Apply wide strips (7) to the inner wall of the upper opening of the arc steel pipe (2) and mark the center point (5) of the upper opening. Use a total station to check and measure the center point (5) of the upper opening of the arc steel pipe (2) to ensure that it is consistent with the coordinate dimensions of the model. Fix the arc steel pipe (2) to the floor with angle steel, adjust the gap and then weld. After welding, repair the welding deformation. Step 8: According to the layout dimension drawing of the horizontal projection plane (3) of the ring beam, install and weld the portal frame (9) on the lower plane of the box-type ring beam (1), place the box-type ring beam (1) on the portal frame (9), use a plumb line (10) to suspend the ground control points of the box-type openings at both ends, adjust the assembly position of the box-type ring beam (1), and after verification, fix the steel pipe column and the box-type ring beam conversion node; Step 9: Weld the box-shaped ring beam (1) to the arc steel pipe (2).

2. The method for fabricating the transition node between the arc-shaped steel pipe column and the box-type ring beam according to claim 1, characterized in that, The high and low points of the upper and lower openings of the circular arc steel pipe (2) are located using a semi-circular arc with R=5mm as the positioning mark.

3. The method for fabricating the transition node between the arc-shaped steel pipe column and the box-type ring beam according to claim 1, characterized in that, The upper plane of the portal frame (9) is at the same height as the lower plane of the box-type ring beam (1).

4. The method for fabricating the transition node between the arc-shaped steel pipe column and the box-type ring beam according to claim 1, characterized in that, The welding is performed using CO2 gas shielded welding. The welding sequence is as follows: first, weld the vertical weld (12) between the arc steel pipe (2) and the box-shaped ring beam (1), and then weld the horizontal weld (13) between the arc steel pipe (2) and the box-shaped ring beam (1).

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