Post-joining construction methods and node components for cable-stayed structures and adjacent non-cable-stayed structures

Abstract

This invention discloses a post-splitting construction method and node components for a suspension structure and an adjacent non-splitting structure. The method includes: S1, constructing and molding the sections independently, keeping the connection points disconnected to isolate the horizontal reaction force of the suspension structure and direct it to a support area with high lateral stiffness; S2, installing the post-splitting section and temporarily connecting it to the structures on both sides using a post-splitting node component. This node component is configured to only transmit vertical loads, release horizontal axial deformation, and restrict out-of-plane horizontal deformation; S3, completing the roof electromechanical and curtain wall construction, monitoring horizontal displacement during the process to ensure that the displacement is within the allowable range; S4, welding is performed after the additional dead load is applied to achieve a rigid connection. The node component includes a force-transmitting lap joint, a connecting plate with an elongated hole, and paired limiting clamps. This invention solves the problems of transmitting horizontal reaction force of the suspension structure to a weak-stiff structure and construction sequence conflicts, eliminating the need for additional temporary supports and improving construction efficiency and structural safety.

Description

Technical Field

[0001] This invention relates to the field of steel structure construction technology, and in particular to a method and node components for post-splitting construction of a suspension structure and an adjacent non-suspension structure. Background Technology

[0002] Large-span steel structure roofs are widely used in sports buildings and large stadiums. Some projects employ differentiated structural systems due to functional requirements, namely roof systems combining cable-stayed and non-cable-stayed structures. During prestressing, cable-stayed systems generate significant horizontal reaction forces. If the two structural systems are rigidly connected directly during construction, these horizontal reaction forces will be transferred to the relatively weaker non-cable-stayed structure, causing a chaotic force transmission system, localized stress concentration, and increased design complexity and project costs. If the two structural systems are completely disconnected, constructed independently, and then rigidly connected, a temporary support system is required. Furthermore, the construction of roof electromechanical systems, curtain walls, and other ancillary structures will be constrained by the condition of the main structure, affecting the continuity of construction procedures and extending the construction period. Therefore, there is an urgent need to develop a post-assembly construction method and matching node components suitable for large-span roofs with differentiated systems to solve the aforementioned technical problems. Summary of the Invention

[0003] The purpose of this invention is to provide a post-splitting construction method and node components for a suspension structure and an adjacent non-suspension structure, which solves the problems in the prior art of horizontal reaction force transmission from the suspension structure to the weak stiffness structure, construction process conflicts, and the need for additional temporary support.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a post-splitting construction method for a suspension structure and an adjacent non-suspension structure, comprising the following steps: S1. Separate and independent construction and forming: The steel structure construction of the suspension structure system and the adjacent non-suspension structure system are completed separately, and the connection between the two is kept disconnected, so that the horizontal reaction force of the suspension structure system is isolated and directed to the support area with strong lateral stiffness, preventing it from being transmitted to the non-suspension structure. S2. Install the spliced ​​section and make a temporary connection: Install the spliced ​​section beam at the connection position between the suspension structure and the adjacent non-suspension structure, and make a temporary connection with the two side structures using the spliced ​​node assembly; the spliced ​​node assembly is configured to: only transmit vertical loads, release horizontal axial deformation, and restrict out-of-plane horizontal deformation during the construction phase; S3. Roof ancillary structure construction: Complete the construction of roof electromechanical and curtain wall. During the construction process, monitor the horizontal displacement at the post-splitting nodes to ensure that the displacement is within the allowable range. S4. Rigid welding during the forming stage: After the additional constant load is applied, welding is performed on the interface of the subsequent splicing section to achieve a rigid connection, so that the suspension structure and the adjacent non-suspension structure enter the forming stage and are subjected to force in a coordinated manner as a whole.

[0005] A node assembly for the above construction method, wherein the node assembly is disposed at the connection position between the rear spliced ​​beam and the structures on both sides, and includes a force-transmitting lap joint, a connecting plate, a limiting clamp, and mounting bolts; The force transmission lap joint uses a plate, one end of which is welded to the flange of the rear splicing section beam, and the other end is lapped on the upper surface of the adjacent structure, only contacting the adjacent structure without welding. The connecting plate is a steel plate with an elongated hole. The length of the elongated hole is consistent with the axial direction of the suspension cable, and the length of the elongated hole is not less than 1.2 times the maximum horizontal deformation during the construction of the suspension cable structure. The limiting clamp is a steel plate with a circular hole, symmetrically arranged on both sides of the connecting plate; The mounting bolts pass through the elongated holes in the connecting plate and the circular holes in the limiting clamping plate to temporarily connect the rear spliced ​​beam section to the structures on both sides.

[0006] Compared with the prior art, the present invention has the following beneficial effects: By keeping the connection points of the two structures disconnected, the horizontal reaction force of the suspension structure is isolated in a directional manner, causing it to flow only to the support area with strong lateral stiffness, thus blocking its transmission to the weak stiffness non-suspension structure. The force system is clear and controllable, reducing the difficulty of structural design and engineering costs.

[0007] After the main structure is completed, the spliced ​​sections can be installed and the roof ancillary structures can be constructed. This solves the problem of work sequence conflicts that require the two structures to be completed before the ancillary structures can be constructed, ensuring the overall construction period of the project and improving construction efficiency.

[0008] The post-joint node components achieve functional separation of vertical force transmission and horizontal displacement release. The force transmission lap joint reliably transmits vertical loads, and the elongated hole connecting plate and bolts cooperate to release horizontal axial deformation, ensuring structural stability during the transition phase without disrupting the horizontal reaction force isolation state during the construction phase.

[0009] The node components can be industrially produced, requiring only assembly and welding on-site. The construction process is simple, highly controllable, and reduces engineering design and construction costs. Attached Figure Description

[0010] Figure 1 This is a schematic cross-sectional view of an embodiment of the present invention; Figure 2 This is a partial isometric view of the spliced ​​segment in an embodiment of the present invention; Figure 3 This is a partial isometric view of the splicing position of the rear segment in an embodiment of the present invention; Figure 4 This is an exploded view of the temporary connecting parts of the subsequent splicing section of the present invention.

[0011] Explanation of reference numerals in the attached drawings: 1. Lower main structure; 2. Non-cable structure; 3. Cable structure; 4. Rear splicing section; 5. Roof auxiliary structure; 6. Force transmission lap joint; 7. Limiting clamp; 8. Connecting plate; 9. Mounting bolt; 10. Butt weld; 11. Screw; 12. Round hole; 13. Oblong hole; 14. Nut. Detailed Implementation

[0012] The following is in conjunction with the appendix Figures 1 to 4 The present invention provides a more detailed description of the specific implementation method of the post-splitting construction method and node components for a suspension structure and an adjacent non-suppression structure.

[0013] The professional sports stadium roof project involved in this embodiment of the invention has a suspension structure 3 with one side supported on the main concrete frame and the other side supported on the A-frame, while the non-suspension structure 2 is supported on the main concrete frame.

[0014] like Figure 1 , Figure 2 , Figure 3 As shown, after the lower main structure 1 is constructed, the suspension structure 3 and the non-suspension structure 2 are installed on top of it, with the connection points between the two disconnected to allow each to form independently. The subsequent splicing section 4 is temporarily connected to the non-suspension structure 2 and the suspension structure 3 through force-transmitting lap joints 6 (straps), limiting clamps 7, connecting plates 8, and mounting bolts 9, so as to transfer vertical loads, release horizontal axial deformation, and limit out-of-plane horizontal deformation, providing a reliable support point for the construction of the roof auxiliary structure 5.

[0015] The specific construction steps are as follows: S1. After the construction of the lower main structure 1 is completed, the construction of the non-suspension structure 2 and the suspension structure 3 is completed respectively, and the connection between the two structures remains disconnected. During the construction phase, the horizontal reaction force generated by the suspension structure 3 is directionally isolated through its support system and introduced into the A-frame or concrete frame with high lateral stiffness, and is not transmitted to the non-suspension structure 2. The two structures are subjected to forces independently.

[0016] S2. After installation, the splicing section 4 is temporarily connected to the non-suspension structure 2 and the suspension structure 3 via the force-transmitting lap joint 6, the limiting clamp 7, the connecting plate 8, and the mounting bolts 9. While maintaining the connection position between the two structures, it provides support points and working surfaces for the construction of the roof auxiliary structure 5. Among them, the force-transmitting lap joint 6 (horse plate) is welded to the flange of the splicing section 4 and overlaps the upper surface of the adjacent structure, only contacting without welding, to transfer vertical loads; the connecting plate 8 has an elongated hole 13, the direction of which is consistent with the suspension cable axis, to ensure that the splicing section 4 can slide freely along the suspension cable direction.

[0017] S3. Construct the roof ancillary structures 5, including the installation of roof mechanical and electrical equipment and the curtain wall system. As the load is gradually applied, the two structures undergo horizontal axial deformation. The overlapping surfaces of the load-transmitting lap joints 6 (straps) allow relative sliding. The elongated holes 13 in the connecting plates 8 ensure that the rear splice section 4 can release horizontal axial deformation and only transmit vertical loads. Figure 4 As shown, the limiting clamp 7 has a circular hole 12, and the connecting plate 8 has an oblong hole 13. The limiting clamp 7, connecting plate 8, mounting bolts 9, and nuts 14 are used together to limit the out-of-plane horizontal deformation of the rear splicing section 4. During construction, the horizontal displacement at the rear splicing node should be monitored in real time to ensure that the slippage is within the allowable range of the oblong hole 13.

[0018] After the completion of S4 and the roof ancillary structure 5, the additional dead load tends to stabilize, and the structure enters the forming stage. Welding of the butt weld 10 is then carried out at the joint of the later splice section 4. Welding should be performed according to the weld grade required by the design, and the welding sequence should preferably proceed symmetrically from the mid-span to both sides to reduce residual welding deformation. After welding, the weld should be visually inspected and subjected to ultrasonic or radiographic non-destructive testing as required. Once qualified, it forms an integral load-bearing structural system, enabling the suspension structure 3 and the adjacent non-suspension structure 2 to work together under the same load.

[0019] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A method for post-joining construction of a suspension structure and an adjacent non-suspension structure, characterized in that, Includes the following steps: S1. Separate and independent construction and forming: The steel structure construction of the suspension structure system and the adjacent non-suspension structure system are completed separately, and the connection between the two is kept disconnected, so that the horizontal reaction force of the suspension structure system is isolated and directed to the support area with strong lateral stiffness, preventing it from being transmitted to the non-suspension structure. S2. Install the spliced ​​section and make a temporary connection: Install the spliced ​​section beam at the connection position between the suspension structure and the adjacent non-suspension structure, and make a temporary connection with the two side structures using the spliced ​​node assembly; the spliced ​​node assembly is configured to: only transmit vertical loads, release horizontal axial deformation, and restrict out-of-plane horizontal deformation during the construction phase; S3. Roof ancillary structure construction: Complete the construction of roof electromechanical and curtain wall. During the construction process, monitor the horizontal displacement at the post-splitting nodes to ensure that the displacement is within the allowable range. S4. Rigid welding during the forming stage: After the additional constant load is applied, welding is performed on the interface of the subsequent splicing section to achieve a rigid connection, so that the suspension structure and the adjacent non-suspension structure enter the forming stage and are subjected to force in a coordinated manner as a whole.

2. The post-construction method for splicing a suspension structure and an adjacent non-suspension structure according to claim 1, characterized in that, The post-joining node assembly mentioned in step S2 includes a connecting plate with an elongated hole. The length direction of the elongated hole is consistent with the suspension cable axis, and the length of the elongated hole is not less than 1.2 times the maximum horizontal deformation during the construction stage of the suspension cable structure.

3. The post-construction method for splicing a suspension structure with an adjacent non-suspension structure according to claim 1, characterized in that, The post-splicing node assembly described in step S2 includes a force-transmitting lap joint that only contacts the upper surface of the adjacent structure without welding. One end of the force-transmitting lap joint is welded to the flange of the post-splicing beam, and the other end overlaps the upper surface of the adjacent structure. After welding is completed in step S4, the force-transmitting lap joint and the post-splicing section together form an integral load-bearing section.

4. The post-construction method for splicing a suspension structure and an adjacent non-suspension structure according to claim 2, characterized in that, The rear splicing node assembly described in step S2 restricts the out-of-plane horizontal deformation of the rear splicing segment through limiting clamps symmetrically arranged on both sides, while allowing horizontal axial displacement to be released through the elongated hole structure opened along the suspension cable axis.

5. A node component for use in the post-joining construction method according to any one of claims 1 to 4, characterized in that, The node assembly is located at the connection point between the rear splice segment beam and the structures on both sides, including: The force-transmitting lap joint has one end fixedly connected to the flange of the subsequent splicing section beam, and the other end lapped on the upper surface of the adjacent structure and only in contact without welding. A connecting plate with an elongated hole, the length of which is aligned with the axial direction of the suspension cable, and the length of the elongated hole is not less than 1.2 times the maximum horizontal deformation during the construction of the suspension cable structure. A pair of limiting clamps are symmetrically arranged on both sides of the connecting plate and are temporarily fixed to the connecting plate by mounting bolts passing through the elongated holes of the connecting plate.

6. The node component according to claim 5, characterized in that, The force-transmitting lap joint is welded and fixed to the flange of the rear spliced ​​beam.

7. The node component according to claim 5, characterized in that, The connecting plate is made of steel, and the short axis diameter of the elongated hole matches the diameter of the mounting bolt.

8. The node component according to claim 5, characterized in that, The limiting clamp is a steel plate with a round hole. The mounting bolt passes through the round hole of the limiting clamp on one side, the oblong hole of the connecting plate, and the round hole of the limiting clamp on the other side in sequence, and is then locked by a nut.

9. The node component according to claim 5, characterized in that, The connecting plate and the force-transmitting lap joint are set independently, and together they realize the functions of transmitting vertical loads, releasing horizontal axial deformation, and restricting out-of-plane horizontal deformation.

10. The node component according to claim 5, characterized in that, The limiting clamps are fastened to the connecting plate by mounting bolts, and the limiting clamps on both sides together restrict the out-of-plane horizontal deformation of the spliced ​​section.

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