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Seismic response analysis of RC frame core-tube building with self-centering braces

  • Xu, Long-He (School of Civil Engineering, Beijing Jiaotong University) ;
  • Xiao, Shui-Jing (School of Civil Engineering, Beijing Jiaotong University) ;
  • Lu, Xiao (School of Civil Engineering, Beijing Jiaotong University)
  • Received : 2018.02.23
  • Accepted : 2018.03.30
  • Published : 2018.06.25
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Abstract

This paper examines the seismic responses of a reinforced concrete (RC) frame core-tube building with pre-pressed spring self-centering energy dissipation (PS-SCED) braces. The PS-SCED brace system consists of friction devices for energy dissipation, pre-pressed combination disc springs for self-centering and tube members as guiding elements. A constitutive model of self-centering flag-shaped hysteresis for PS-SCED brace is developed to better simulate the seismic responses of the RC frame core-tube building with PS-SCED braces, which is also verified by the tests of two braces under low cyclic reversed loading. Results indicate that the self-centering and energy dissipation capabilities are well predicted by the proposed constitutive model of the PS-SCED brace. The structure with PS-SCED braces presents similar peak story drift ratio, smaller peak acceleration, smaller base shear force and much smaller residual deformations as compared to the RC frame core-tube building with bucking-restrained braces (BRBs).

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China, Beijing Natural Science Foundation

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