Research on the Flexural Performance of Fully-Assembled Bolted Spherical Joints with Ribbed T-Plates Attached to Steel Plates

Zhang Ailin; Yan Rui; Jiang Ziqin

doi:10.13206/j.gjgS24022004

Volume 40 Issue 9

Sep. 2025

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Zhang Ailin, Yan Rui, Jiang Ziqin. Research on the Flexural Performance of Fully-Assembled Bolted Spherical Joints with Ribbed T-Plates Attached to Steel Plates[J]. STEEL CONSTRUCTION(Chinese & English), 2025, 40(9): 25-35. doi: 10.13206/j.gjgS24022004

Citation:

Zhang Ailin, Yan Rui, Jiang Ziqin. Research on the Flexural Performance of Fully-Assembled Bolted Spherical Joints with Ribbed T-Plates Attached to Steel Plates[J]. STEEL CONSTRUCTION(Chinese & English), 2025, 40(9): 25-35. doi: 10.13206/j.gjgS24022004

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Research on the Flexural Performance of Fully-Assembled Bolted Spherical Joints with Ribbed T-Plates Attached to Steel Plates

doi: 10.13206/j.gjgS24022004

Zhang Ailin^1,2,
Yan Rui¹,
Jiang Ziqin^{1,2
,
,}

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

Received Date: 2024-02-20
Available Online: 2025-11-05
Publish Date: 2025-09-22

Abstract

Abstract

Based on prefabricated long-span steel structure joints and traditional bolted spherical joints， a novel fully-assembled bolted spherical joint with ribbed T-plates and additional connecting steel plates， suitable for long-span spatial structures， is proposed in this paper. The joint consists of a round steel tube， connecting discs， ribbed T-plates， connecting steel plates， and high-strength bolts， making it simple in construction and convenient to install. A finite element model of the joint was established using the finite element software ABAQUS. Eleven numerical models of the joint were designed， considering parameters such as the ribbed T-plate's flange thickness， web thickness， long rib plate thickness， and short rib plate thickness， as well as the thickness of the connecting steel plate. The failure modes and moment-rotation curves of the joint were obtained. The influence of different parameters of the joint on the flexural performance in the in-plane and out-of-plane directions was analyzed. The results showed that increasing the flange thickness of the ribbed T-plate significantly improved the flexural stiffness and flexural capacity of the joint. Increasing the thickness of the flange of the ribbed T-plate， the thickness of the long ribbed T-plate， the thickness of the short ribbed T-plate， or the thickness of the connecting steel plate reduced the difference in the ultimate bending capacity between the two directions. By analyzing the stress contour plot of the joint， it was concluded that the failure modes mainly included local failure of the joint steel plate， the short rib plate， and the screw hole wall at the tension edge of the flange under the local pressure of the screw.
- prefabricated steel structure,
- bolted spherical joint,
- flexural performance,
- numerical simulation,
- failure mode,
- ultimate bearing capacity

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References(21)

References

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