建筑结构学报2017，Vol.38Issue(8)：45-54,10.DOI:10.14006/j.jzjgxb.2017.08.005
设置可更换连梁的双筒体混凝土结构振动台试验研究
Shaking table tests of double tube concrete structure with replaceable coupling beams
摘要
Abstract
Replaceable device in coupling beam is a type of device,which is installed in the structure to change the plastic development mechanism of the coupling beam.During strong earthquakes,damage occurs in replaceable devices whereas the connecting beams at two ends remain elastic,and the damaged devices could be replaced after earthquake,which complies well with the idea of earthquake resilient structure.Two 1/5 scaled double-tube concrete model structures were designed and tested on the shaking table.The dynamic properties and seismic reactions were compared through the tests.The results indicate that,comparing to the normal structure,the degradation trend with the increase of PGA of the first two natural frequencies of the structure with replaceable coupling beam are the same;the varying pattern of the floor maximum acceleration and the acceleration amplification are similar;the residual displacement is reduced and the maximum floor residual displacement is 1.26 mm,corresponding to 0.14％ maximum floor residual drift ratio,which shows a good resilient capacity of the new structure;the maximum rebar strain in the RC beam section is lower and the replaceable device could concentrate damage and keep the rest intact;the rebar stain in the shear wall base is also alleviated before PGA is less than 0.8g.关键词
可恢复功能结构/双筒体混凝土结构/可更换连梁/振动台试验/可恢复能力Key words
resilient structure/double-tube concrete structure/replaceable coupling beam/shaking table test/resilient capacity分类
建筑与水利引用本文复制引用
吕西林,陈聪..设置可更换连梁的双筒体混凝土结构振动台试验研究[J].建筑结构学报,2017,38(8):45-54,10.基金项目
国家自然科学基金项目(51261120377,51638012). （51261120377,51638012）
