多塔大底盘层间隔震结构地震响应控制研究  

Seismic responses control of inter-story isolated multi-tower structure with a large chassis

作　　者：刘谦敏 苗启松 閤东东 陈曦 LIU Qianmin;MIAO Qisong;GE Dongdong;CHEN Xi(Beijing Institute of Architectural Design Co.,Ltd.,Beijing 100045,China)

机构地区：[1]北京市建筑设计研究院股份有限公司,北京100045

出　　处：《地震工程与工程振动》2024年第4期148-156,共9页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(52278289)。

摘　　要：探讨不同响应控制方法对层间隔震建筑抗震性能的影响,并识别不同方法在提升层间隔震建筑抗震性能方面的优劣,进而为层间隔震结构地震响应控制设计提供参考。基于一多塔大底盘层间隔震结构工程案例,分别考虑在隔震层和大底盘中加入黏滞阻尼器以及增加大底盘刚度这3种方案,基于Perform-3D建立了3种设计案例和原型结构的弹塑性分析模型,对比分析了4个结构的地震响应,从而识别出3种设计方案对多塔大底盘层间隔震结构地震响应的控制效果。研究结果表明:对隔震层位移和大底盘楼面加速度控制效果最优的方案是在隔震层中设置黏滞阻尼器,但该方案会导致塔楼的地震响应显著增加;对大底盘层间位移角以及塔楼层间位移角和楼面加速度的控制效果最优的方案是增加大底盘刚度。对于塔楼的层间位移角,3种方案均无明显控制效果。Study the influence of different seismic response control methods on the seismic performance of inter-story isolated multi-tower structure with a large chassis,identify the advantages of different methods in improving the seismic performance,and then provide reference for the seismic response control of such structures.Three control schemes were designed based on a real engineering practice of such building,including adding viscous fluid dampers in the isolation system,adding viscous fluid dampers in the large chassis,and increasing the stiffness of the large chassis.The elastic-plastic finite element models of three control schemes and the prototype structure were established by using the Perform-3D.The seismic responses of these four structures were analyzed and compared,and the control effects of three control schemes on the seismic responses were identified.The following conclusions are drawn that introducing viscous dampers to isolation system is an optimal scheme for controlling the displacement of isolation system and floor acceleration of large chassis,but it significantly increased the seismic responses of tower.The control effects of increasing the stiffness of large chassis on the inter-story drift ratio of large chassis,as well as on the inter-story drift ratio and floor acceleration of tower are the best.All three schemes have negligible control effects on the inter-story drift ratio of tower.

关 键 词：多塔大底盘层间隔震结构 黏滞阻尼器 刚度 地震响应 

分 类 号：TU375.3[建筑科学—结构工程]