Techno Press

Steel and Composite Structures   Volume 26, Number 6, March25 2018, pages 793-808
Experimental seismic behaviour of L-CFST column to H-beam connections
Wang Zhang, Zhihua Chen, Qingqing Xiong, Ting Zhou, Xian Rong and Yansheng Du

Abstract     [Full Text]
    In this study, the seismic performance of the connections between L-shaped columns composed of concrete-filled steel tubes (L-CFST columns) and H-beams used in high-rise steel frame structures was investigated. Seven full-scale specimens were tested under quasi-static cyclic loading. The variables studied in the tests included the joint type, the axial compression ratio, the presence of concrete, the width-to-thickness ratio and the internal extension length of the side plates. The hysteretic response, strength degradation, stiffness degradation, ductility, plastic rotation capacity, energy dissipation capacity and the strain distribution were evaluated at different load cycles. The test results indicated that both the corner and exterior joint specimens failed due to local buckling and crack within the beam flange adjacent to the end of the side plates. However, the failure modes of the interior joint specimens primarily included local buckling and crack at the end plates and curved corners of the beam flange. A design method was proposed for the flexural capacity of the end plate connection in the interior joint. Good agreement was observed between the theoretical and test results of both the yield and ultimate flexural capacity of the end plate connection.
Key Words
    L-shaped column composed of concrete-filled steel tubes; side plate connection; end plate connection; experimental study; seismic performance; high-rise steel structure residential building; flexural capacity
(1) Zhihua Chen:
State Key Laboratory of Hydraulic Engineering Simulation and Safety, China;
(2) Wang Zhang, Zhihua Chen, Qingqing Xiong:
School of Civil Engineering, Tianjin University, Tianjin, China;
(3) Zhihua Chen:
School of Civil Engineering, Tianjin University, Tianjin, China;
(4) Ting Zhou:
School of Architecture, Tianjin University, Tianjin, China;
(5) Xian Rong, Yansheng Du:
School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin, 300401, China;
(6) Qingqing Xiong:
School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang, 050043, China.

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