近断层地震动下不同三重摩擦摆隔震结构的抗震性能
Seismic Performance of Different Triple Friction Pendulum Isolation Structures under Near-Fault Ground Motion
刘海洋 1荣强 2李博文2
作者信息
- 1. 中国十九冶集团有限公司,四川攀枝花 617000;烟台大学土木工程学院,山东烟台 264005
- 2. 烟台大学土木工程学院,山东烟台 264005
- 折叠
摘要
为研究近断层地震动下三重摩擦摆隔震支座在不同隔震结构下的隔震效果,基于SAP2000有限元软件分析,建立高层建筑结构模型.输入近断层地震波,分析对比近断层地震动作用下三重摩擦摆基础隔震、双层隔震、组合隔震结构地震响应.研究表明:三种隔震方式均能延长结构自振周期,双层隔震结构的周期比最小,对结构扭转效应降低最好;三重摩擦摆基础隔震与双层隔震时程曲线在地震激励结束时会产生"反弹"效果,组合隔震结构大幅降低了"反弹"效果,且粘滞阻尼器可以帮助三重摩擦摆隔震支座和建筑物本身消耗部分的地震能量.
Abstract
In order to study the isolation effect of triple friction pendulum isolation bearing with different isolation structures under near-fault ground motion,based on the analysis of SAP2000 finite element software,a high-rise building structure model is established.By inputting near-fault seismic waves,the seismic responses of triple fric-tion pendulum base-isolated,double-layer isolated and combined isolated structures under near-fault ground motions are analyzed and compared.The results show that the three isolation methods can prolong the natural vibration peri-od of the structure,the period ratio of the double-layer isolation structure is the smallest,and the torsion effect of the structure is the best.The time history curve of triple friction pendulum foundation and double layer isolation will produce"rebound"effect at the end of seismic excitation,and the combined isolation structure greatly reduces the"rebound"effect,and the viscous damper can help the triple friction pendulum isolation bearing and the building i t self consume part of the seismic energy.
关键词
近断层地震动/粘滞阻尼器/时程曲线/能量曲线Key words
near-fault ground motion/viscous damper/time history curve/energy curve引用本文复制引用
基金项目
山东省自然科学基金资助项目(ZR2020ME238)
出版年
2024
国家科技期刊平台
NSTL
万方数据