底盘刚度对非对称双塔连体结构抗震的影响

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英文篇名：Influence of base rigidity on seismic response of asymmetric two-tower connecting structures 中文刊名：建筑结构学报 英文刊名：Journal of Building Structures 作者：杜玉飞 ; 沈蒲生 英文作者：DU Yufei ; SHEN Pusheng(College of Civil Engineering ; Hunan University ; Changsha 410082 ; China) 中文关键词：高层建筑 ; 非对称双塔连体结构 ; 地震响应 ; 振型 ; 扭转 英文关键词：tall building ; asymmetric two-tower connecting structure ; seismic response ; vibration model ; torsion 出版日期：2008-12-30 机构：湖南大学土木工程学院; 年：2008 期：S1 出版单位：建筑结构学报

摘要

大底盘非对称双塔连体结构是一种复杂的结构体系。运用ETABS对高塔45层矮塔30层的非对称双塔连体结构进行了地震反应分析,通过改变底盘层数,得到了周期、振型及各楼层侧移变化曲线。当底盘由2层逐渐增加至30层时,振型变化明显,周期先减小后增大,高、矮塔楼各楼层x、y方向位移的变化趋势基本一致,且对顶层影响最大。设计时既要避免底盘层数过少,导致楼层位移较大的情况;又要避免底盘层数过多,周期、塔顶侧移增大的现象。
Asymmetric two-tower connecting structure with enlarged base is a kind of complicated architectural structures.Seismic response of a structure with left tower of 45 stories and right tower of 30 stories is analyzed by using the software ETABS.The curves of periods,vibration modes and displacements with changing number of the base from two stories to thirty stories were obtained.The vibration modes are obviously different and periods are decreased at the beginning and are increased in the end as increasing of the base story.The tendency of displacements of both taller and lower towers is similar to the periods.Large displacements are caused when the base floors are too few.On the contrary,increasing periods and displacement at top were caused when the base floors are too many.

引文

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