建筑结构学报2017，Vol.38Issue(11)：34-41,8.DOI:10.14006/j.jzjgxb.2017.11.004
大直径钢管混凝土柱抗震性能试验研究及承载力计算
Experimental study on seismic behavior of CFST columns with large diameter and calculation of bearing capacities
摘要
Abstract
In order to study the effect of diameter-thickness ratio (D/t) on seismic behavior of concrete filled steel tubular (CFST) columns,two specimens with diameter 600 mm were tested under constant vertical loads and cyclic horizontal loads.The failure phenomenon,hysteretic curves,strains developing procedure on steel tubes and core reinforcement of the specimens with D/t of 37.5 and 50 were analyzed.The test results show that,the hysteretic curves of CFST columns with large diameter are very full.The energy dissipation performance is superior.The deformation capacity is excellent.With the increase ofD/t,the maximum deformation angle and the equivalent damping ratio of the specimens are slightly reduced.The concrete crushing and tube wall buckling occur mainly in the region between the bearing plate and the first row of studs which have a clear constraint effect on the tube wall of the specimens.When D/t is relatively small,the steel pipe wall has stronger constraint effect on the core concrete,and the residual deformation is smaller.The core longitudinal reinforcement is basically in the elastic state.The stirrups are far from the yield strain,even they have less constrain effect on concrete.But there is obvious slip between reinforcement and concrete.The bending bearing capacity of concrete filled steel tubular columns with large diameter in the test is significantly higher than calculation results according to the relevant specifications in China,which means the Chinese specification is conservative.关键词
钢管混凝土柱/径厚比/拟静力试验/承载力/抗震性能Key words
concrete filled steel tubular (CFST) column/diameter-thickness ratio/quasi-static test/load-carrying capacity/seismic behavior分类
建筑与水利引用本文复制引用
范重,王倩倩,李振宝,叶勇,赵长军,仕帅,裴雨晨,赵薇..大直径钢管混凝土柱抗震性能试验研究及承载力计算[J].建筑结构学报,2017,38(11):34-41,8.基金项目
中国建设科技集团股份有限公司科技创新基金项目(Z2014J09). （Z2014J09）
