（1 北京未来城市设计高精尖创新中心， 北京 100044； 2  北京建筑大学土木与交通工程学院，北京 100044；  3 东南大学土木工程学院， 南京 210096)

［摘要］以2栋设防烈度为8-5度、近断层且具有不同高度的框架-核心筒高层隔震工程案例为原型，综合考虑不同因素包括不同隔震设计方案、不同结构高度、不同屈重比的影响，基于精细有限元模型对20个设计案例进行了罕遇地震下的结构楼面加速度响应特征分析，揭示了不同因素对楼面绝对加速度峰值的影响规律。结果表明，与剪力墙高层隔震结构、框架-剪力墙高层隔震结构相类似，该类框架-核心筒高层隔震结构楼面绝对加速度峰值呈现出典型的K型分布特征，结构顶层、底部和中部点的楼面绝对加速度峰值分别为地面输入加速度峰值的59%～70%，63%～76%和18%～22%。同时需要引起重视的是，罕遇地震下28%～45%的楼层的楼面绝对加速度峰值会超过3m/s2，可能会引起楼层重要设备的损伤。

［关键词］高层隔震结构； 框架-核心筒； 楼面加速度； 隔震设计方案； 屈重比

中图分类号：TU352文献标识码：A文章编号：1002-848X(2019)07-0133-06

Research on floor acceleration response characteristics of  RC frame-core tube high-rise isolation structure

Lu Jiaming1,2， Xie Linlin1,2， Li Aiqun1,2,3， Zeng Demin1,2， Yang Cantian1,2

(1 Beijing Advanced Innovation Center for Future Urban Design, Beijing 100044， China；  2  School of Civil and Transportation  Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044， China； 3 School of Civil Engineering, Southeast University, Nanjing 210096， China)

Abstract:Two high-rise RC frame-core tube isolation engineering cases with different heights in region with 8-5 degrees of seismic precautionary intensity and near faults were taken as examples. Considering the effects of different isolation design schemes, different structural heights and different yield-weight ratios, the acceleration response characteristics of 20 design cases under rare earthquakes were analyzed based on the fine finite element model to reveal the influence of different factors on the peak absolute acceleration of floors. The results show that the peak absolute acceleration of the floor of this kind of RC frame-core tube high-rise isolation structure features K-typed distribution, similar to that of shear wall high-rise isolation structure and frame-shear wall high-rise isolation structure. The peak absolute acceleration of the top, bottom and middle points of the structure is 59%~70%, 63%~76% and 18%~22% of peak ground acceleration input respectively. At the same time, attention should be paid to the fact that the peak absolute acceleration of 28%~45% floors under rare earthquakes will exceed 3m/s2, which may cause damage to important  equipment of floors.

Keywords:high-rise isolation structure; frame-core tube structure; floor acceleration; isolation design scheme; yield-weight ratio

*国家重点研发计划课题(2017YFC0703600)，北京市教委科技一般项目(KM201910016014)，北京未来城市设计高精尖创新中心(UDC2016030200)，北京建筑大学研究生创新项目(PG2018025，PG2018030)。

通讯作者：解琳琳,博士，讲师, Email: xielinlin@bucea.edu.cn。