摘要
为研究异型截面多腔钢管混凝土分叉柱不同加载方向下的抗震性能,结合某超高层建筑多腔钢管混凝土巨型框架结构,设计了4个1/30缩尺的分叉柱模型试件,进行了2种不同加载方向的低周反复荷载试验研究,一种沿截面长轴方向加载,另一种沿截面短轴方向加载。试件截面腔体钢板厚度包括2mm和3mm两种。分析了各试件的破坏特征、滞回特性、承载力、延性、刚度退化和耗能性能。研究表明,不同加载方向异型截面多腔钢管混凝土分叉柱受力性能有明显差异,沿截面长轴加载方向试件的承载力高、刚度大、延性好、耗能能力强;合理增加分腔钢板厚度能使分叉柱抗震性能加强。
In order to study seismic behavior of the complex cross-section concrete filled steel tube( CFST) bifurcated-columns under horizontal forces in different directions,based on a super high-rise building with multi-cell CFST mega bifurcated column,four 1 /30 scale bifurcated-column specimens were designed and tested under two kinds of low cyclic load in different directions. One was along the long axis and another was along the short axis.The cross-section constructional details were divided into two types,one thickness of the cell steel plate was 2 mm and another was 3 mm. The failure modes,hysteresis behavior,bearing-capacity,ductility,stiffness degradation,and energy dissipation were analyzed. Research shows that the mechanical property of complex cross-section CFST bifurcated-columns varies evidently in different directions,and the seismic behavior of the bifurcated-columns can be strengthened by a reasonable increase in the thickness of the steel plate.
出处
《地震工程与工程振动》
CSCD
北大核心
2016年第2期1-8,共8页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金青年基金项目(51408017)~~
关键词
多腔钢管混凝土
分叉柱
截面构造
拟静力研究
抗震性能
multi-cell CFST
bifurcated-columns
cross-section constructional detail
pseudo static test
seismic behavior