- 摘 要
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（1 北京未來城市設計高精尖創(chuàng)新中心， 北京 100044； 2 北京建筑大學土木與交通工程學院，北京 100044； 3 東南大學土木工程學院， 南京 210096)
［摘要］以2棟設防烈度為8-5度、近斷層且具有不同高度的框架-核心筒高層隔震工程案例為原型，綜合考慮不同因素包括不同隔震設計方案、不同結構高度、不同屈重比的影響，基于精細有限元模型對20個設計案例進行了罕遇地震下的結構樓面加速度響應特征分析，揭示了不同因素對樓面絕對加速度峰值的影響規(guī)律。結果表明，與剪力墻高層隔震結構、框架-剪力墻高層隔震結構相類似，該類框架-核心筒高層隔震結構樓面絕對加速度峰值呈現(xiàn)出典型的K型分布特征，結構頂層、底部和中部點的樓面絕對加速度峰值分別為地面輸入加速度峰值的59%～70%，63%～76%和18%～22%。同時需要引起重視的是，罕遇地震下28%～45%的樓層的樓面絕對加速度峰值會超過3m/s2，可能會引起樓層重要設備的損傷。
［關鍵詞］高層隔震結構； 框架-核心筒； 樓面加速度； 隔震設計方案； 屈重比
中圖分類號：TU352文獻標識碼：A文章編號：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
*國家重點研發(fā)計劃課題(2017YFC0703600)，北京市教委科技一般項目(KM201910016014)，北京未來城市設計高精尖創(chuàng)新中心(UDC2016030200)，北京建筑大學研究生創(chuàng)新項目(PG2018025，PG2018030)。
通訊作者：解琳琳,博士，講師, Email: xielinlin@bucea.edu.cn。
