摘要
为探究摩擦摆支座隔震结构的动力响应及减震性能,以某钢筋混凝土框架结构为研究对象,使用SAP2000软件,分别建立摩擦摆隔震结构和非隔震结构两种模型,通过对比分析结构的位移、塑性铰、能量耗散等指标,为摩擦摆支座在实际工程中的应用提供参考。研究结果表明,摩擦摆隔震支座的应用使结构自振周期增大,使结构在地震动作用下的动力响应和层间剪力减小,有效避免了结构因为层间剪力过大而破坏的现象出现;在相同地震动输入条件下,隔震结构进入塑性产生塑性铰的构件始终少于非隔震结构,隔震结构发生塑性破坏的时间节点滞后于非隔震结构,且隔震结构具有优异的滞回耗能能力,能显著减小地震动输入到结构中的能量;摩擦摆隔震支座具有良好的隔震效果,是一种高效的隔震措施。
In order to explore the dynamic response and damping performance of the friction pendulum bearing isolation structure,a reinforced concrete frame structure was used as the research object,and SAP2000 software was used to establish two models of friction pendulum isolation structure and non-isolation structure respectively.Through comparative analysis of structural displacement,plastic hinge,energy dissipation and other indicators,the reference is provided for the application of friction pendulum bearing in practical engineering.The results show that the application of the friction pendulum isolation bearing can increase the natural vibration period of the structure,reduce the dynamic response and story shear force of the structure under the action of ground motion,and effectively avoid the phenomenon that the structure is damaged due to the excessive story shear force;Under the same ground motion input conditions,the number of plastic hinge of the isolated structure is always less than that of the non-isolated structure,and the time of plastic failure of the isolated structure lags behind that of the non-isolated structure,and the isolated structure has excellent hysteretic energy dissipation capacity,which can significantly reduce the energy input into the structure;friction pendulum bearing has good isolation effect and is an efficient isolation measure.
作者
谢明雷
陈健
XIE Minglei;CHEN Jian(China Nuclear Power Engineering Co.,Ltd.,Building design division,Beijing 100840,China)
出处
《建筑结构》
CSCD
北大核心
2021年第S01期988-992,共5页
Building Structure
关键词
摩擦摆
框架结构
动力响应
塑性铰
能量耗散
friction pendulum
frame structure
dynamic response
plastic hinge
energy dissipation
