Steel and Composite Structures

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Experimental and analytical performance evaluation of steel beam to concrete-encased composite column with unsymmetrical steel section joints

  • Xiao, Yunfeng (School of Urban Construction, Yangtze University) ;
  • Zeng, Lei (School of Urban Construction, Yangtze University) ;
  • Cui, Zhenkun (School of Urban Construction, Yangtze University) ;
  • Jin, Siqian (School of Urban Construction, Yangtze University) ;
  • Chen, Yiguang (School of Urban Construction, Yangtze University)
  • Received : 2016.02.13
  • Accepted : 2016.12.06
  • Published : 2017.01.20
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Abstract

The seismic performance of steel beam to concrete-encased composite column with unsymmetrical steel section joints is investigated and reported within this paper. Experimental and analytical evaluation were conducted on a total of 8 specimens with T-shaped and L-shaped steel section under lateral cyclic loading and axial compression. The test parameters included concrete strength, stirrup ratio and axial compression ratio. The response of the specimens was presented in terms of their hysterisis loop behavior, stress distribution, joint shear strength, and performance degradation. The experiment indicated good structural behavior and good seismic performance. In addition, a three-dimensional nonlinear finite-element analysis simulating was conducted to simulate their seismic behaviors. The finite-element analysis incorporated both bond-slip relationship and crack interface interaction between steel and concrete. The results were also compared with the test data, and the analytical prediction of joint shear strength was satisfactory for both joints with T-shaped and L-shaped steel section columns. The steel beam to concrete-encased composite column with unsymmetrical steel section joints can develop stable hysteretic response and large energy absorption capacity by providing enough stirrups and decreased spacing of transverse ties in column.

Keywords

Acknowledgement

Supported by : Natural Science Foundation of Hubei Province of China, Natural Science Foundation of China, Science Foundation of the Education Department of Hubei Province of China

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