建筑结构学报2024，Vol.45Issue(1)：128-138,11.DOI:10.14006/j.jzjgxb.2022.0733
双钢管混凝土构件滞回性能试验与分析
Experimental and numerical study on hysteretic behaviour of concrete-filled double tubular columns
摘要
Abstract
In order to investigate the hysteretic behaviour of concrete-filled double tubular(CFDT)columns,the quasi-static tests on 12 square CFDT members with inner circular steel tubes were completed.The influence of the axial load ratio(0.2,0.4 and 0.6)and the diameter-thickness ratio(30,44.5 and 57)of inner circular steel tubes on the failure modes of specimens,horizontal load-displacement curves and seismic performance were examined.Based on the fiber beam element subroutine iFiberLUT and ABAQUS software,a numerical model was developed to predict the test results and analyze the effects of various parameters on the horizontal load-displacement skeleton curves.The test results show that the circumferential local buckling of outer steel tube in the lower zone of columns gradually become obvious with the increase of the axial load ratio,while the diameter-thickness ratio of inner steel tube exhibit slight effect on the deformation capacity of columns.Within the parameters of this study,all horizontal load-displacement hysteretic loops are relatively full,and the average value of displacement ductility coefficient and viscous damping coefficient of all specimens are 0.326 and 0.6 respectively,showing a superior deformation and energy dissipation capacity.With an increase in the axial load ratio,the bearing capacity,the ductility and horizontal stiffness of specimens decrease,but the strength degradation is slight.When the axial load ratio increases from 0.2 to 0.6,the cwerage peak load decreases by 53.4％.The parameter analysis indicate that with an increase in the width-thickness ratio,the improvement of the diameter-thickness ratio of outer steel tube can lead to a more obvious increase in the peak loak of members,but increasing the axial load ratio can mitigate the influence of the diameter-thickness ratio of inner steel tube on the bearing capacity.关键词
双钢管混凝土/轴压比/拟静力试验/有限元分析/抗震性能Key words
concrete-filled double tube(CFDT)/axial load ratio/quasi-static test/finite element analysis/seismic performance分类
建筑与水利引用本文复制引用
王文达,陈亚明,纪孙航,史艳莉..双钢管混凝土构件滞回性能试验与分析[J].建筑结构学报,2024,45(1):128-138,11.基金项目
国家自然科学基金项目(52168020). （52168020）
