建筑结构学报2018，Vol.39Issue(3)：67-76,10.DOI:10.14006/j.jzjgxb.2018.03.009
不同构造多腔钢管混凝土巨型柱抗震性能试验研究
Seismic behavior of special-shaped multi-cell concrete-filled steel tubular mega-columns with different constructions
摘要
Abstract
In order to study the seismic behavior of special-shaped concrete-filled steel tubular (CFI) octagon section mega-columns with different configurations,four 1/30-scaled mega-column specimens were designed and tested under low-cycle reversal loading.Focus was given to their damage evolution behavior,hysteretic characteristics,bearing capacity,stiffness degradation,ductility,and energy dissipation.Four different section properties were considered,namely,basic configuration with 13 ceils,simplified configuration with 5 cells,section strengthened with corner angle,and section strengthened with corner circular steel tube.The research shows that among the four different crosssection configurations,the one strengthened with corner circular steel tube shows the most favorable seismic performance,and the comer steel angle also leads to satisfactory behavior.The bearing capacity of the sections with 5 cells and 13 cells differs significantly,and the ductility of the former is better.In addition,the two configurations lead to similar energy dissipation.The average yielding drift ratio of specimens is 1/111,and the drift ratios at failure point of specimens are all larger than 1/37 indicating good ductility.The estimated load bearing capacity using strip method is shown to agree well with the test results.关键词
钢管混凝土柱/八边形异形截面/截面构造/低周反复荷载试验/抗震性能/承载力计算Key words
CFT column/octagon special-shaped cross-section/cross-section construction/low cycle reversal loading test/seismic behavior/bearing capacity calculation分类
建筑与水利引用本文复制引用
殷飞,董宏英,曹万林,薛素铎,乔崎云,武海鹏..不同构造多腔钢管混凝土巨型柱抗震性能试验研究[J].建筑结构学报,2018,39(3):67-76,10.基金项目
国家自然科学基金项目(51578020). （51578020）
