Concrete filled steel tube (CFST) columns subjected to concentrically partial compression

Concrete filled steel tube (CFST) columns subjected to concentrically partial compression
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承受同心局部压缩的钢管混凝土 (CFST) 柱

DOI:
10.1016/j.tws.2011.09.007
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发表时间:
2012
影响因子:
6.4
通讯作者:
Han Lin-Hai
Han Lin-Hai
中科院分区:
工程技术2区
文献类型:
--
作者:
Yang You-Fu;Han Lin-Hai

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本文研究了薄壁钢管混凝土轴心受压柱的受力性能。通过一系列试验研究了钢管混凝土柱截面形式、长径(宽)比、部分受压面积比和顶部端板厚度对钢管混凝土柱偏压性能和承载力的影响。对26个钢管混凝土试件进行了试验,得到了试件的承载力、荷载-变形关系和破坏形态。结果表明,钢管混凝土轴心受压柱具有较好的承载力和延性。建立了钢管混凝土轴心受压柱的有限元分析模型,并与试验结果进行了比较。利用有限元模型对钢管混凝土轴心受压柱的受力机理进行了分析。最后,提出了一个可用于预测轴心受压组合柱承载力的简化模型。
This paper studies the behaviour of thin-walled concrete filled steel tube (CFST) column subjected to concentrically partial compression. A series of tests was carried out to investigate the effects of sectional type, length-to-diameter (width) ratio, partial compression area ratio and top endplate thickness on the behaviour and bearing capacity of partially loaded CFST column. Twenty-six CFST specimens were tested, and the bearing capacity, load versus deformation relation and failure mode of the specimens were obtained. It was shown that the CFST columns under concentrically partial compression generally had reasonable bearing capacity and ductility. A finite element analysis (FEA) model was developed for simulating the behaviour of CFST column subjected to concentrically partial compression, and a comparison of the performances predicted using this model showed generally good agreement with the test results. The FEA model was then used for the mechanism analysis of CFST column subjected to concentrically partial compression. Finally, a simplified model that could be used to predict the bearing capacity of the composite column under concentrically partial compression was proposed.
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