Research on the Flexural Behavior of Cross-Shaped Prefabricated Joints with Additional Screw Rods

Zhang Ailin; Bu Yunpeng; Jiang Ziqin

doi:10.13206/j.gjgS25040301

Volume 41 Issue 11

Nov. 2026

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Zhang Ailin, Bu Yunpeng, Jiang Ziqin. Research on the Flexural Behavior of Cross-Shaped Prefabricated Joints with Additional Screw Rods[J]. STEEL CONSTRUCTION(Chinese & English), 2026, 41(11): 1-11. doi: 10.13206/j.gjgS25040301

Citation:

Zhang Ailin, Bu Yunpeng, Jiang Ziqin. Research on the Flexural Behavior of Cross-Shaped Prefabricated Joints with Additional Screw Rods[J]. STEEL CONSTRUCTION(Chinese & English), 2026, 41(11): 1-11. doi: 10.13206/j.gjgS25040301

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Research on the Flexural Behavior of Cross-Shaped Prefabricated Joints with Additional Screw Rods

doi: 10.13206/j.gjgS25040301

Zhang Ailin^1,2,
Bu Yunpeng¹,
Jiang Ziqin^{1,2
,
,}

1. Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing 100124, China;
2. Beijing Engineering Research Center of High-Rise and Large-Span Prestressed Steel Structure, Beijing University of Technology, Beijing 100124, China

Received Date: 2025-04-03

Abstract

Abstract

In order to realize the prefabricated joint of members in long-span spatial structures such as single-layer reticulated shells and suspend-domes， a cross-shaped prefabricated joint with additional screw rods is proposed based on welded ball joints. The joint consists of welded balls， circular steel tubes， connecting end plates， screw rods， T-shaped steel plates， angle steel connecting plates， and high-strength bolts. Using ABAQUS software， nine numerical models were established to conduct a parametric analysis of the joint’s flexural behavior. Firstly， the effects of the flange/web thickness of the T-shaped steel plate， the connecting plate thickness， and the screw rod diameter on the flexural behavior of the joint were investigated. The results showed that the cross-shaped prefabricated joint with additional screw rods exhibited satisfactory flexural behavior. The flange thickness and screw rod diameter of the T-shaped steel plate were identified as the key parameters affecting the in-plane flexural behavior， while the web thickness and screw rod diameter were the key parameters affecting the out-of-plane flexural behavior. Finally， based on the parametric analysis results， calculation methods for the bearing capacity and initial stiffness of the joint were proposed and verified. The results indicated that the errors of the proposed calculation methods were within 15%， demonstrating that they can effectively guide the design of the joint.
- long-span spatial structure,
- prefabricated joint,
- flexural behavior,
- joint design

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References(19)

References

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