建筑结构学报2017，Vol.38Issue(9)：62-73,12.DOI:10.14006/j.jzjgxb.2017.09.008
基础隔震在高烈度区大高宽比剪力墙结构中的应用与试验研究
Application and experimental investigation on base-isolated shear-wall structure with large height-width ratio in high seismic intensity regions
摘要
Abstract
The superstructure of Yuxi public rental buildings,which is base-isolated high-rise shear-wall structure with a height of 90.35 m,a height-width ratio of 3.96,and a seismic fortification intensity of 8 degree (0.2g),was designed under 7 degree,according to the expected earthquake reduction target.The Pushover analysis under rare earthquake was done.Furthermore,the nonlinear earthquake time-history analysis on the entire isolated structure was also done.Then,a 1∶12.5 scaled model was made according to similitude theory,and shaking table tests were carried out.The experimental investigation results show that the base-isolated high-rise shear-wall structure designed with the given method has excellent seismic performances and enough seismic safety margin.The structure is well without any failure,frequencies of the first 5 orders unchanged.The structure still remains elastic,under frequent and moderate earthquake of 8 degree.Tiny cracks appear on several coupling beams,under rare earthquake of 8 degree.The inter-story displacement angle,the maximum displacement as well as the stress of rubber bearings completely match the requirement of the code.The horizontal shear force-displacement hysteretic loops of isolation story are full,which shows a significant dissipation of seismic energy.After suffering from the super rare earthquakes of 9 degree (0.7g),the structure has not overturned,and local collapse has not occurred.A few coupling beams and walls are damaged slightly,and the maximum decrease of the first 5 order frequencies has been smaller than 10％,which means the decrease of the structure's stiffness is negligible.关键词
高层剪力墙结构/基础隔震/高烈度区/振动台试验/抗震性能Key words
high-rise shear-wall structure/base isolation/high seismic intensity region/shaking table test/seismic performance分类
建筑与水利引用本文复制引用
赖正聪,潘文,白羽,叶燎原,杨晓东,苏何先..基础隔震在高烈度区大高宽比剪力墙结构中的应用与试验研究[J].建筑结构学报,2017,38(9):62-73,12.基金项目
国家自然科学基金项目(51368027,51168024). （51368027,51168024）
