Steel and Composite Structures

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Hybrid simulation tests of high-strength steel composite K-eccentrically braced frames with spatial substructure

  • Li, Tengfei (School of Civil Engineering, Xi'an University of Architecture and Technology) ;
  • Su, Mingzhou (School of Civil Engineering, Xi'an University of Architecture and Technology) ;
  • Guo, Jiangran (School of Civil Engineering, Xi'an University of Architecture and Technology)
  • Received : 2019.05.06
  • Accepted : 2021.01.31
  • Published : 2021.02.25
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Abstract

Based on the spatial substructure hybrid simulation test (SHST) method, the seismic performance of a high-strength steel composite K-eccentrically braced frame (K-HSS-EBF) structure system is studied. First, on the basis of the existing pseudostatic experiments, a numerical model corresponding to the experimental model was established using OpenSees, which mainly simulated the shear effect of the shear links. A three-story and five-span spatial K-HSS-EBF was taken as the prototype, and SHST was performed with a half-scale SHST model. According to the test results, the validity of the SHST model was verified, and the main seismic performance indexes of the experimental substructure under different seismic waves were studied. The results show that the hybrid simulation results are basically consistent with the numerical simulation results of the global structure. The deformation of each story is mainly concentrated in the web of the shear link owing to shear deformation. The maximum interstory drifts of the model structure during Strength Level Earthquake (SLE) and Maximum Considered Earthquake (MCE) meet the demands of interstory limitations in the Chinese seismic design code of buildings. In conclusion, the seismic response characteristics of the K-HSS-EBFs are successfully simulated using the spatial SHST, which shows that the K-HSS-EBFs have good seismic performance.

Keywords

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