CREEP EFFECT ON ULTIMATE STRENGTH OF CONCRETE COLUMNS

摘要：

Long-term mechanical properties test for 864 days were completed on three types column, including plain concrete(PC), reinforced concrete(RC) and concrete-filled steel tube(CFST) columns, the creep performance and ultimate strength were tested and analyzed. Creep test results show that reinforcement can significantly reduce the creep deformation of concrete columns. The creep coefficient of steel pipe surface is larger than that of inner concrete for CFST columns, it would last a long time for the creep of inner concrete to achieve stability. The ultimate strength test results show that loading age and reinforcement have great effect on extreme compression strain and ultimate strength of PC columns and RC columns. Whether it has loading course would influence the stress redistribution of CFST columns, the stress redistribution effect is relatively small for columns having loading course. However, whether it has loading course, the creep effect on the ultimate strength of CFST columns is very small.

关键词： Concrete columns creep ultimate strength

作者: Guo-Hui Cao Ran He Xiao-Fang Liu Xiang-Rong Liu

作者单位: School of Civil Engineering,Hunan City University,Yiyang 413000,P.R. China

会议类型: 国际会议

会议名称: The 4th Internatiuonal Symposium on Lifetime Engineering of Civil Infrastructure(第四届土木工程结构生命周期国际学术研讨会)

会议地点: 长沙

会议语种:英文

页码: 665-670

在线出版日期: 2009-10-26（万方平台首次上网日期，不代表论文的发表时间）