Axial load behavior of square CFT stub column with binding bars

被引:159
作者
Cai, J [1 ]
He, ZQ [1 ]
机构
[1] S China Univ Technol, Dept Civil Engn, Guangzhou 510641, Peoples R China
关键词
square CFT stub column; binding bars; ultimate strength; load-bearing capacity;
D O I
10.1016/j.jcsr.2005.09.010
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
This paper is concerned with the axial load behavior of square concrete filled steel tubular (S-CFT) stub columns with binding bars provided to improve the mechanical behavior of S-CFT columns. Ten specimens with binding bars and 5 specimens without binding bars were tested to examine the effects of width-to-thickness ratios and binding bars on ultimate strength, stiffness and ductility of S-CFT columns. A method for calculating ultimate strength is proposed based on a constitutive model of confined concrete and a simplification corresponding to this method is conducted. Finally, the method proposed in this paper is verified with experimental results in this test program and data from other experiments. Corresponding values of ultimate strength calculated by EC4(1996) and GJB(2000) are given respectively for comparison. For S-CFT stub columns with binding bars, the results predicted by the method proposed herein agree well with the experimental results while that predicted by the methods of EC4(1996) and GJB(2000) scatter from the experimental results; for S-CFT without binding bars, the results given by the three methods mentioned above are all reasonable. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码:472 / 483
页数:12
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