摘要
考虑长期荷载作用效应的影响 ,进行了矩形截面钢管混凝土 (以下简称矩形钢管混凝土 )轴心受压构件变形和承载力的试验研究。基于美国混凝土学会 (ACI 1992 )提供的混凝土徐变和收缩模型 ,对长期荷载作用下矩形钢管混凝土构件的变形进行了计算 ,理论结果和试验结果吻合较好。利用数值方法分析了考虑长期荷载作用影响时 ,矩形钢管混凝土轴心受压柱的荷载 -变形关系曲线 ,理论计算曲线和试验曲线基本吻合。在系统分析了长细比、截面含钢率、钢材种类和混凝土强度等因素影响的基础上 。
The behavior of concrete-filled steel tubular (CFST) columns with rectangular s ection under long-term loading was studied.The CFST columns with rectangular se ction were tested to investigate effects of long-term loading on behaviors of t he members.A model was used in study proposed by the ACI(1992)Specification.It i s shown that the results caculated is well agreement with that of the testing on e. Based on analyzing influence of factors such as length to breadth ratio,steel rate on section,steel sort and strength of concrete,a simplified method for the bearing capacity considering the effects of long-term loading has been propose d.
出处
《土木工程学报》
EI
CSCD
北大核心
2004年第3期12-18,共7页
China Civil Engineering Journal
基金
福建省重大科技计划项目 ( 2 0 0 2H0 0 7)资助
