The study on the vulnerability of the concrete stilled steel tubular frame with buckling-restrained braces structure under the coupling of wind and earthquake
Liu Yang1 Li Hongnan1,2 Li Chao1 Zheng Xiaowei1 Zhang Hao2
1. Dalian University of Technology, Dalian 116024, China; 2. Shenyang Jianzhu University, Shenyang 110168, China
Abstract：During their service periods, engineering structures may inevitably be subjected to multiple natural hazards, such as winds and earthquakes. The vulnerability of a concrete filled steel tubular frame with buckling-restrained braces under the coupling of wind and earthquake is investigated. The wind speed time histories at different heights of the structure are simulated by assuming the return period to be 1 year, 10 years and 50 years, respectively. The OpenSees platform is employed to develop the finite element model of the considered structure. Nonlinear time history analyses are performed for the structural numerical models under four cases, namely the separate earthquake excitation, simultaneous earthquake and wind with return periods of 1 year, 10 years and 50 years, respectively. Fragility curves under different cases are generated based on the probabilistic seismic demand analysis. The numerical results show that the structural response and the vulnerability increase gradually with the wind speed, while the influence of the wind loads decreases with the increase of the intensities of input seismic motions.
刘 杨 李宏男 李 超 郑晓伟 张 皓. 风与地震耦合作用下钢管混凝土框架-防屈曲支撑#br#
结构体系易损性研究[J]. 土木工程学报, 2019, 52(2): 56-65.
Liu Yang Li Hongnan Li Chao Zheng Xiaowei Zhang Hao. The study on the vulnerability of the concrete stilled steel tubular frame with buckling-restrained braces structure under the coupling of wind and earthquake. 土木工程学报, 2019, 52(2): 56-65.
