Research on Axial Compression Capacity of CHS T-Joints Reinforced with Channel Steel

BAI Yang; ZHU Lei; WANG Zhe

doi:10.13204/j.gyjzG20082905

Volume 52 Issue 4

Jul. 2022

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2022 > 52(4): 56-61

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Citation:

BAI Yang, ZHU Lei, WANG Zhe. Research on Axial Compression Capacity of CHS T-Joints Reinforced with Channel Steel[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(4): 56-61. doi: 10.13204/j.gyjzG20082905

Citation:

BAI Yang, ZHU Lei, WANG Zhe. Research on Axial Compression Capacity of CHS T-Joints Reinforced with Channel Steel[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(4): 56-61. doi: 10.13204/j.gyjzG20082905

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Research on Axial Compression Capacity of CHS T-Joints Reinforced with Channel Steel

doi: 10.13204/j.gyjzG20082905

BAI Yang^1,2,3,
ZHU Lei^{1,2,3
,
,},
WANG Zhe⁴

1. Beijing Advanced Innovation Center for Future Urban Design, School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;
2. Beijing Higher Institution Engineering Research Center of Structural Engineering and New Materials, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;
3. Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;
4. China Institute of Building Standard Design and Research, Beijing 100048, China

Received Date: 2020-08-29
Available Online: 2022-07-25

Abstract

Abstract

At present, steel tubular structures have been widely used in engineering. When a circular hollow sections (CHS) T-joint transmits the axial compression through its brace, the joint often damages due to large deformation at the joint zone. In order to improve the bearing capacity of the joint, the study of reinforcing the joint with channel steel connection was carried out. Firstly, the finite element software ABAQUS was used to simulate the axial bearing capacity test of three groups of six T-joints without and with external stiffeners. The finite element simulation results were consistent with the test results, which verified the reliability of the finite element method. Then ABAQUS software was used to study the bearing capacity of channel steel connection joints under axial compression, and three sets of simulation of different β (brace-to-chord diameter, d₁/d₀) were conducted to analyze the influence of different channel steel models and different lengths of the same channel steel on the bearing capacity and deformation of the joints. The finite element simulation results showed that the bearing capacity of the joints connected by channel steel was at least 130% and at most 252% higher than that of the unreinforced joints, and the deformation of the chord was improved. With the increase of the cross-section size of channel steel, the bearing capacity of channel steel joints was firstly increased and then decreased. When β was 0.25, the bearing capacity increased from 130% to 252%, and then decreased to 196%; When β was 0.5, the bearing capacity increased from 133% to 293%, and then decreased to 170%. With the increase of channel steel cross-section size, the failure mode was also changed from chord deformation to channel sag. When β was 0.5 and the 22b channel steel was selected, the ultimate bearing capacity decreased from 212% to 142% with the increase of channel steel length.
- joint reinforcement,
- channel steel connection,
- ultimate bearing capacity,
- failure mode,
- finite element simulation

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References(14)

References

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