ANALYSIS OF THE TORSIONAL STIFFNESS OF THE DUMBBELL-SHAPED CONCRETE-FILLED STEEL TUBULAR MEMBERS

摘要：

　　A finite element model was developed and a formula for the torsional stiffness of the concrete filled steel tubular (CFST) dumbbell-shaped cross section was derived.It shows that the torsional stiffness of the CFST dumbbell-shaped cross section can be considered as the sum of the torsional stiffness of the steel members (the upper and lower steel tubes and steel webs),concrete filled in the tubes,and concrete filled in the web interspace.However,the concrete filled in the web interspace accounts for a proportion of less than 5%,hence its effects is negligible.We had therefore simplified the formula.Comparison between the calculation results and the finite element modeling results shows that the proposed formula in this study is a convenient and accurate method for the torsional stiffness of the CFST dumbbell-shaped cross section.

关键词： Concrete filled steel tubular (CFST) dumbbell-shaped torsional stiffness formula

作者: Jiangang Wei Bin Fu Baochun Chen

作者单位: College of Civil Engineering, Fuzhou University, Fuzhou 350108, P.R.China

会议类型: 国际会议

会议名称: The Twelfth International Symposium on Structural Engineering (第十二届结构工程国际研讨会)

会议地点: 武汉

会议语种:英文

页码: 819-823

在线出版日期: 2012-11-17（万方平台首次上网日期，不代表论文的发表时间）