远场长周期地震动作用下“先滑后限”的滑移隔震结构隔震性能研究  

Study on Isolation Performance of“Sliding,later Limited”Sliding Isolation Structure under Far-field Long-period Ground Motion

作　　者：张超[1] 张慧[1] 杨谦[1] ZHANG Chao;ZHANG Hui;YANG Qian(Shaanxi Polytechnic Institute,Xianyang 712000,China)

机构地区：[1]陕西工业职业技术学院,陕西咸阳712000

出　　处：《粉煤灰综合利用》2022年第2期10-15,40,共7页Fly Ash Comprehensive Utilization

基　　金：陕西省教育厅专项基金(12JK0895);陕西工业职业技术学院2021年院级科研计划项目(2021YKYB-067)。

摘　　要：建立“先滑后限”的滑移隔震结构和“一滑就限”的滑移隔震结构计算模型,分别输入远场类谐和长周期地震动和远场非谐和地震动,研究在远场类谐和长周期地震动作用下两类结构的动力响应(加速度、层间位移、层间剪力)变化规律。结果表明:“先滑后限”的滑移隔震结构较大程度地减小结构动力响应,具有良好的隔震性能。在远场类谐和地震动作用下,随着地震烈度的增加,“先滑后限”的滑移隔震结构动力响应降低的幅度基本都在减小。两类结构在远场类谐和地震动作用下的动力响应均大于远场非谐和地震动作用下的动力响应,两类结构都属于较长周期结构,对远场类谐和地震动都较为敏感,因此在隔震设计时应重视远场长周期地震动对滑移隔震结构的影响。“Sliding, later limited” sliding isolation structure and“sliding, meanwhile limited”sliding isolation structure under far-field harmonic-alike ground motion and far-field non-harmonic ground motion are established respectively.The dynamic responses change law(interlayer displacement, acceleration and interlayer shearing force) of two kinds of structures under the action of far-field harmonic-alike ground motion was analyzed.The results show that “sliding, later limited” sliding isolation structure greatly reduces the dynamic response of structure and has good seismic isolation performance.Under the action of far-field harmonic-alike ground motion, with the increase of seismic intensity, the magnitude of reduction of dynamic response of “sliding, later limited” sliding isolation structure basically decreases.The dynamic responses of the two types of structures under far-field harmonic-alike ground motion are both greater than those under far-field non-harmonic ground motion.Both types of structures are long-period structures and are more sensitive to far-field harmonic-alike ground motions, therefore, the impact of far-field long-period ground motions on the sliding isolation structure should be paid attention to in isolation structure design.

关 键 词：远场长周期地震动 先滑后限 隔震性能 

分 类 号：TU352.1[建筑科学—结构工程]