风与地震耦合作用下钢管混凝土框架-防屈曲支撑结构体系易损性研究  

The study on the vulnerability of the concrete stilled steel tubular frame with buckling-restrained braces structure under the coupling of wind and earthquake

作　　者：刘杨[1] 李宏男[1,2] 李超[1] 郑晓伟[1] 张皓[2] Liu Yang;Li Hongnan;Li Chao;Zheng Xiaowei;Zhang Hao(Dalian University of Technology,Dalian 116024,China;Shenyang Jianzhu University,Shenyang 110168,China)

机构地区：[1]大连理工大学,辽宁大连116024 [2]沈阳建筑大学,辽宁沈阳110168

出　　处：《土木工程学报》2019年第2期56-65,共10页China Civil Engineering Journal

基　　金：国家重点研发计划(2016YFC0701108);国家自然科学基金(51738007;51808099)

摘　　要：工程结构在其全寿命服役期间会不可避免地遭受风或地震等多种灾害的作用。以钢管混凝土框架-防屈曲支撑结构体系为研究对象,模拟了重现期分别为1年、10年和50年的结构不同高度处的风速时程,基于OpenSees有限元软件对结构开展了地震单独作用和重现期分别为1年、10年和50年的风与地震耦合作用4种工况下的非线性动力时程分析,并基于地震需求分析方法生成了结构在不同工况下的易损性曲线。结果表明:随着风作用的增大,结构的反应和易损性均有增大趋势;而随着地震动强度的增大,风作用对结构易损性的影响则逐渐减小。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 cou.pling 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.

关 键 词：风与地震耦合作用 钢管混凝土框架 防屈曲支撑 非线性动力时程分析 易损性 

分 类 号：TU398.9[建筑科学—结构工程]