带约束拉杆方形钢管混凝土轴压短柱的承载力计算

何振强; 蔡健

doi:10.13204/j.gyjz200803004

带约束拉杆方形钢管混凝土轴压短柱的承载力计算

doi: 10.13204/j.gyjz200803004

何振强¹,
蔡健²

1.
1. 广东新广国际集团,广州 510600;
2.
2. 华南理工大学土木工程系,广州 510641

详细信息

作者简介:
何振强,男,1972年10月出生,博士副总工程师.E-mail:sain-th@sohu.Com

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出版历程
- 收稿日期: 2007-11-10
- 刊出日期: 2008-03-20

CALCULATION FOR BEARING CAPACITY OF CONCRETE-FILLED STEEL SQUARE TUBE COLUMN WITH BINDING BARS SUBJECTED TO AXIAL LOAD

He Zhenqiang¹,
Cai Jian²

1.
1. Guangdong Xinguang International Group,Guangzhou 510600;
2.
2. Civil Engineering Dept.,SCUT.,Guangzhou 510641

摘要

摘要: 在现有一般方形钢管混凝土轴压短柱承载力的主要计算方法的基础上,利用前期对在带约束拉杆方形钢管混凝土的本构关系的研究基础上推导出的带约束拉杆方形钢管混凝土轴压短柱的承载力计算公式,结合实际工程应用的需要进行简化。分别应用该公式、EC4(1996)规范及我国军用标准GJB(2000)的相关公式对带约束拉杆和不带约束拉杆的方形钢管混凝土轴压短柱试件极限承载力进行计算。计算值与试验值对比表明:对一般方形钢管混凝土轴压短柱试件,三者计算结果比较接近,均能较好反映试件的真实承载力;对设置了约束拉杆的试件,该公式由于考虑了拉杆的约束作用,给出的计算结果更为合理,EC4(1996)及GJB(2000)给出结果的均值与试验值接近,但离散性偏大。
- 方形钢管混凝土短柱 /
- 约束拉杆 /
- 本构关系 /
- 承载力
Abstract: The formulae for calculating bearing capacity of square concrete-filled steel tube (CFT) stub column with binding bars subjected to axial load are deduced based on the constitutive relationship of square concrete-filled steel tube, which are followed by a simplified method for the need of applying in practice conveniently. A calculation for the ultimate bearing capacity of square CFT stub columns with or without binding bars is conducted by the formulae put forward in this paper, the method of EC4(1996) and that of GJB(2000) respectively. The comparison between the results of calculation and those of experiments show that: 1) for the square CFT stub columns without binding bars, results got by all of the three methods are reasonable and close to each other; 2) for the square CFT stub columns with binding bars, results got by the method put forward in this paper are more reasonable because of considering the confining effect of binding bars.
- square CFT stub column /
- binding bars /
- constitutive relationship /
- bearing capacity