Torsional Behavior of Concrete-Filled Circular Steel Tube Columns
Torsional Behavior of Concrete-Filled Circular Steel Tube Columns
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DOI：
10.1061/(asce)0733-9445(2009)135:10(1250
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发表时间：
2009-09
期刊：
影响因子：
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通讯作者：
Eun-Taik Lee;B. Yun;Hyunju Shim;K. Chang;George C. Lee
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文献类型：
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作者：
Eun-Taik Lee;B. Yun;Hyunju Shim;K. Chang;George C. Lee
钢管混凝土柱是高层建筑中常用的一种结构形式。过去对钢管混凝土的研究主要集中在单轴受压、弯曲和偏心受压方面，少数研究集中在压扭联合作用下的构件性能。本文考虑钢管的约束效应、混凝土的软化效应和螺旋效应，对圆形钢管混凝土柱在扭压联合作用下的受力性能进行了理论研究。还考虑了由于对角裂纹引起的双轴应力效应。将这些因素纳入协调条件和平衡条件，得到了描述钢管混凝土构件全过程受扭性能的基本方程。
Concrete-filled tubes (CFTs) are columns commonly used in high-rise building construction due to their structural effectiveness. Past studies on CFT have focused primarily on uniaxial compression, bending, and eccentric compression and a few investigations have studied member behavior under combined compression and torsion. In this paper, the behavior of a circular CFT column under combined torsion and compression was theoretically investigated considering the confinement effect of the steel tube, softening of concrete, and spiral effects. Biaxial stress effects due to diagonal cracking were also considered. By incorporating these factors into the compatibility and equilibrium conditions, a basic equation to describe the torsional behavior of the entire loading history of CFT members was derived.