建筑结构学报2017，Vol.38Issue(12)：68-77,10.DOI:10.14006/j.jzjgxb.2017.12.008
长周期地震波作用下超高层框架-核心筒减震结构动力响应分析
Dynamic response analysis of super high-rise frame-core tube structure under long-period ground motions
摘要
Abstract
A super high-rise frame-core tube structural elastic time-history analysis under the frequent earthquake of seismic fortification intensity zone 7 was researched.Two groups of ground motion records with obvious long-period components were selected as the seismic input.Main seismic response values were compared with the results under the corresponding normal ground motion input cases.Comparison of the results shows that seismic responses such as base shear,inter-story drift ratio and acceleration amplification factor under long-period ground motions are apparently higher than the seismic responses under normal ground motions,which indicates that the usage of conventional dampers may not be suitable for reducing structural responses under long-period ground motion.A new displacement amplification damping system and its theoretical formulas were proposed to improve energy dissipation capacity based on the viscous damper's mechanical characteristic.The responses of original structure and damping structure with and without displacement amplification damping system under long-period ground motion were compared.It is concluded that the proposed displacement amplification damping system can perform more effectively in reducing high-rise structural seismic responses subject to long-period ground motions.关键词
减震结构/框架-核心筒结构/位移放大型阻尼器/长周期地震动/有限元分析/地震响应Key words
damping structure/frame-core tube structure/displacement amplification damper/long-period ground motion/FEA/seismic response分类
建筑与水利引用本文复制引用
郭彦,刘文光,何文福,董秀玲..长周期地震波作用下超高层框架-核心筒减震结构动力响应分析[J].建筑结构学报,2017,38(12):68-77,10.基金项目
国家自然科学基金项目(51278291,51478257),上海市自然科学基金项目(15ZR1416200). （51278291,51478257）
