Multi-rod space intersection steel joint

By increasing the cross-section and wall thickness of the main chord rod at the multi-bar space intersection node of the steel structure roof, and staggering the welding of multiple chord rods and belly rods, the problem of difficult to ensure the quality and aesthetics of the nodes is solved, and the amount of steel used in the structure is reduced and the construction convenience is facilitated.

CN222632539UActive Publication Date: 2025-03-18CITIC GENERAL INST OF ARCHITECTURAL DESIGN & RES
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Patent Information

Application Number
CN202421411386.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-19
Publication Date
2025-03-18
Estimated Expiration
2034-06-19

AI Technical Summary

Technical Problem

In the spatial grid structure of steel structure roofs, the node design where multiple rods meet in one place is difficult to ensure quality and beauty. Existing solutions such as welding ball nodes, increasing the cross-section of the main chord, or using tiled steel plates, etc. have limitations.

Method used

Design a multi-bar space intersection steel node. By increasing the cross-section and wall thickness of the main chord at the node, and welding multiple chords and abdominal rods staggeredly on the variable cross-section section of the main chord to avoid weld accumulation and ensure strong welding of secondary chords and abdominal rods.

Benefits of technology

The amount of steel used in the structure and its own weight are reduced, node analysis is simplified, construction convenience and implementability are improved, and welding complexity and aesthetic problems are avoided.

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Abstract

The utility model belongs to the field of building steel structures, and provides a multi-rod space intersection steel joint which comprises two main chord members, four secondary chord members, four diagonal web members and a vertical web member. Each main chord member comprises a main chord member standard section, a main chord member transition section and a main chord member variable cross-section section, the included angle between the two main chord members is 170-180 degrees, and a transverse stiffening rib is arranged at the joint. And the four secondary chord members, the four diagonal web members and the vertical web member are respectively connected to the main chord member variable cross-section sections on the two main chord members at specific space angles. According to the steel joint, the section and the wall thickness of the main chord member are only transitionally increased at the joint, and compared with a traditional mode that the section of the main chord member is completely increased, the steel consumption of the structure can be obviously reduced, and the self-weight of the structure is reduced; while the economical efficiency is embodied, a plurality of chord members and web members are spatially staggered and welded on the variable cross-section section of the main chord member, so that the accumulation of welding seams is avoided, and equal-strength welding of the secondary chord members and the web members is ensured structurally, so that complex node analysis is avoided; and the convenience and the feasibility of on-site construction can also be considered.
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