Experimental study on seismic behavior of multi-storey high strength steel composite Y-eccentrically braced steel frame
Wang Feng Su Mingzhou Li Shen Lian Ming Zheng Xiaowei Tian Xiaohong Hong Min
1. Xi′an University of Architecture and Technology, Xi′an 710055, China;
2. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
Abstract：A 1∶2 scale three-story Y-shape high strength steel composite eccentrically braced frame (Y-HSS-EBF) was carried out under low-cyclic load to study its seismic performance. Based on the results, the seismic behavior is evaluated in terms of loading capacity, rigidity degeneration, ductility, energy dissipation, and the failure mode. Inverted triangular horizontal loads were applied to the frame cyclically. The research result shows that the Y-HSS-EBF structure has good loading capacity, ductility and energy dissipation capacity. The link fabricated by the lower yield strength steel dissipated most of the energy under horizontal load by plastic deformation, while the non-energy dissipation members using high strength steel remain elastic, to ensure the structural integrity. The damage location is the beam-link joint for its complicated stress state, stress concentration and the restraint of the floor.
Keywords：
