摘要
为研究一种新型具位移放大机制减振体系的消能减振性能,本文采用Midas建立4组具有不同减振体系的RC框架结构,将其分别在15组地震激励下进行动力响应分析,分别获得了各结构体系的增量动力分析曲线。基于此,通过定义不同地震强度工况,得到了各结构体系的易损性曲线与各性能指标的超越概率。研究结果表明:该新型具位移放大机制减振体系的倒塌破坏概率明显低于另外三组减振体系,其具有显著的消能减振性能,可用于钢筋混凝土减振结构的地震易损性评估。
In order to study the energy dissipation and vibration reduction performance of a novel shock absorption system with displacement amplification mechanism,four groups of reinforced concrete(RC)frame structures with different damping systems were established by MIDAS software,the dynamic response analyses were conducted under fifteen earthquake excitations respectively,and the incremental dynamic analysis(IDA)curves of each structural system were obtained.Based on these,the vulnerability curves and exceeding probability of each performance index of structures are obtained by defining different seismic intensity conditions.The results show that the collapse failure probability of the new system with displacement amplification mechanism is significantly lower than that of the other three damping systems and the new type of damping system has significant energy dissipation and vibration reduction performance,which can be used for seismic vulnerability assessment of RC frame structures with damping systems.
作者
周方圆
冯欢
刘伟
周乐木
ZHOU Fangyuan;FENG Huan;LIU Wei;ZHOU Lemu(School of Civil and Hydraulic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;Hubei Provincial Road&Bridge Co Ltd,Wuhan 430056,China)
出处
《土木工程与管理学报》
2022年第2期46-52,共7页
Journal of Civil Engineering and Management
基金
国家自然科学基金(51878314
51308243)。
关键词
钢筋混凝土结构
位移放大机制
减振体系
振动控制
易损性评估
reinforced concrete structure
displacement amplification mechanism
vibration reduction system
vibration control
vulnerability assessment
