Mechanical performance of eccentrically loaded pre-stressing concrete filled circular steel tube columns by means of expansive cement
Mechanical performance of eccentrically loaded pre-stressing concrete filled circular steel tube columns by means of expansive cement
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DOI：
10.1016/j.engstruct.2009.06.007
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发表时间：
2009-11
影响因子：
5.5
通讯作者：
X. Chang;Chengkui Huang;Ya-Juan Chen
中科院分区：
文献类型：
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作者：
X. Chang;Chengkui Huang;Ya-Juan Chen
本文对偏心荷载作用下的预应力圆钢管混凝土膨胀柱进行了试验和数值研究。本文还对常规钢管混凝土（CFT）试件进行了试验，以供比较。基于钢筋随动加固和混凝土边界面本构关系，编制了计算偏心受压PCFT/CFT柱完全荷载中高挠度曲线的非线性有限元程序。计算结果与试验结果吻合较好。结果表明，在其他参数相同的情况下，偏心加载PCFT柱的承载力普遍高于CFT柱。但随着载荷偏心比的增大，两者的承载能力差异减小。对预应力、荷载偏心比、配钢率等因素也进行了研究。
This paper presents experimental and numerical investigations of pre-stressed concrete filled circular steel tube columns by means of expansive (PCFT) under eccentric loading. Conventional concrete filled steel tube (CFT) specimens are also tested in this paper just for comparison purposes. Based on the steel follow-up strengthening and concrete bounding surface constitutive relationships, this paper writes a nonlinear finite element program for calculating complete load mid-height deflection curves of eccentrically loaded PCFT/CFT columns. A good agreement is obtained between the calculated and test results. The results indicate that the eccentrically loaded PCFT columns generally have higher load carrying capacities than the CFT ones when other parameters are kept the same. But by increasing the load eccentricity ratio, the difference of load carrying capacity between them decreases. Other factors such as pre-stress, load eccentricity ratio, and steel ratio, etc. are also investigated.