Steel and Composite Structures

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Experimental seismic behavior of RC special-shaped column to steel beam connections with steel jacket

  • Hao, Jiashu (School of Civil Engineering, Tianjin University) ;
  • Ren, Qingying (China Architecture Design & Res Grp) ;
  • Li, Xingqian (School of Civil Engineering, Tianjin University) ;
  • Zhang, Xizhi (Tianjin University Research Institute of Architectural Design & Urban planning) ;
  • Ding, Yongjun (Tianjin University Research Institute of Architectural Design & Urban planning) ;
  • Zhang, Shaohua (Tianjin University Research Institute of Architectural Design & Urban planning)
  • Received : 2020.12.25
  • Accepted : 2022.10.04
  • Published : 2022.10.10
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Abstract

The seismic performance of the reinforced concrete (RC) special-shaped column to steel beam connections with steel jacket used in the RC column to steel beam fabricated frame structures was investigated in this study. The three full-scale specimens were subjected to cyclic loading. The failure mode, ultimate bearing capacity, shear strength capacity, stiffness degradation, energy dissipation capacity, and strain distribution of the specimens were studied by varying the steel jacket thickness parameters. Test results indicate that the RC special-shaped column to steel beam connection with steel jacket is reliable and has excellent seismic performance. The hysteresis curve is full and has excellent energy dissipation capacity. The thickness of the steel jacket is an important parameter affecting the seismic performance of the proposed connections, and the shear strength capacity, ductility, and initial stiffness of the specimens improve with the increase in the thickness of the steel jacket. The calculation formula for the shear strength capacity of RC special-shaped column to steel beam connections with steel jacket is proposed on the basis of the experimental results and numerical simulation analysis. The theoretical values of the formula are in good agreement with the experimental values.

Keywords

Acknowledgement

The research described in this paper was financially supported by the National Natural Science Foundation of China (grant no.: 51578369), the Tianjin Science and Technology Major Projects, China (grant no.:17ZXCXSF00080) and Development and demonstration of high performance green assembled storage buildings (2017-379). The authors wish to express their sincere gratitude to the sponsors.

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