[1]李爱群,刘立德,曾德民,等.高烈度区近断层RC框架-核心筒高层结构隔震设计关键参数取值[J].东南大学学报(自然科学版),2018,48(2):294-302.[doi:10.3969/j.issn.1001-0505.2018.02.017]
 Li Aiqun,Liu Lide,Zeng Demin,et al.Critical design parameters of seismically isolated RC frame-core tube tall buildings located in near-fault regions[J].Journal of Southeast University (Natural Science Edition),2018,48(2):294-302.[doi:10.3969/j.issn.1001-0505.2018.02.017]
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高烈度区近断层RC框架-核心筒高层结构隔震设计关键参数取值()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
48
期数:
2018年第2期
页码:
294-302
栏目:
其他
出版日期:
2018-03-20

文章信息/Info

Title:
Critical design parameters of seismically isolated RC frame-core tube tall buildings located in near-fault regions
作者:
李爱群123刘立德12曾德民12杨参天12解琳琳12
1北京建筑大学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
Author(s):
Li Aiqun123 Liu Lide12 Zeng Demin12 Yang Cantian12 Xie Linlin12
1Beijing Advanced Innovation Center for Future Urban Design, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
2School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
3School of Civil Engineering, Southeast University, Nanjing 210096, China
关键词:
高层隔震结构 屈重比 近场影响系数 框架-核心筒结构
Keywords:
seismically isolated tall building yield ratio of the isolation system near field influence coefficient frame-core tube structure
分类号:
P315.9;TU375
DOI:
10.3969/j.issn.1001-0505.2018.02.017
摘要:
以2栋设防烈度为8.5度、近断层且具有不同高度的钢筋混凝土框架核心筒高层隔震工程案例为原型,考虑不同隔震设计方案(核心筒下沉隔震方案和整体±0隔震方案)的影响.基于精细有限元模型,研究了屈重比对该类结构减震系数和隔震层位移的影响规律,并以此为基础对近场影响系数的取值开展了初步研究.结果表明,减震系数和隔震沟尺寸要求分别决定了RC框架-核心筒高层隔震结构屈重比的上限值和下限值,适用于该类结构的合理屈重比的取值范围为2%~3%;近场和远场地震动作用下的结构响应分布特征一致,但近场下的结构响应明显强于远场下的结构响应;当断层距小于5 km时,近场影响系数可适当放宽至1.25.
Abstract:
Based on two reinforced concrete(RC)frame-core tube tall buildings located in near-fault regions with the seismic intensity of 8.5 degree and different heights, two seismically isolated schemes i.e. traditional base-isolated scheme and partially basement-isolate scheme were designed. Then, the influences of yield ratio of the isolation system on the seismic decrease coefficient and the maximum bearing displacement were investigated using the refined finite element model. Furthermore, the appropriate value of the near field influence coefficient was studied. The studies show that the rational range of the yield ratio of the isolation system is recommended as 2% to 3%. The structural responses under near fault ground motions and ordinary ground motions exhibite identical distribution characteristics. However, the structural responses under near fault ground motions are much severer than those under ordinary ground motions. The near field influence coefficient with a value of 1.25 is suggested for the seismically isolated design of RC frame-core tube tall buildings when the corresponding closet distance to rupture plane is less than 5 km.

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备注/Memo

备注/Memo:
收稿日期: 2017-09-24.
作者简介: 李爱群(1962—),男,博士,教授,博士生导师,liaiqun@bucea.edu.cn.
基金项目: 国家重点研发计划重点专项资助项目(2017YFC0703602)、北京未来城市设计高精尖创新中心资助项目(UDC2016030200)、北京建筑大学博士启动资助项目(KYJJ2017005).
引用本文: 李爱群,刘立德,曾德民,等.高烈度区近断层RC框架-核心筒高层结构隔震设计关键参数取值[J].东南大学学报(自然科学版),2018,48(2):294-302. DOI:10.3969/j.issn.1001-0505.2018.02.017.
更新日期/Last Update: 2018-03-20