Abstract:Continuous rocking structural system with dampers is capable of limiting weak stories and controlling structural deformation shape due to continuous rocking structure and dampers. However, this type of structural system is not suitable for high-rise buildings due to the limited flexural stiffness of continuous rocking structure, which cannot always meet seismic design demands. Dual rocking structural system with dampers is promoted. The dual rocking mechanism reduces seismic design demands of rocking structures and prevents weak stories by dividing continuous rocking structures into two parts. The dampers set at bottom of rocking structures dissipate earthquake energy and decrease seismic response of the whole structure. Four structural systems are established as comparisons to investigate the seismic performance of dual-rocking structural system with dampers, including brace frame structure, continuous rocking structure with dampers, continuous rocking structure without dampers and dual-rocking structure without dampers. Elastoplastic models are created by software OpenSees and seismic elastoplastic analysis and incremental dynamic analysis are conducted. According to the study, dual-rocking structural system with dampers, with favorable seismic performance and anti-collapse behavior, is more efficient in reducing seismic design demands of rocking structure and decreasing seismic response, comparing to continuous rocking structural system with dampers. It is suitable for high-rise buildings.
李国强1,2,张文津2,王彦博2,孙飞飞1,2. 双段消能摇摆结构体系的地震反应特性研究[J]. 振动与冲击, 2021, 40(5): 92-101.
LI Guoqiang1,2, ZHANG Wenjin2, WANG Yanbo2, SUN Feifei1,2. Seismic response characteristics of dual-stage energy dissipation rocking structure system. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(5): 92-101.
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