Analytical behaviour of eccentrically loaded concrete-encased CFST box columns

Analytical behaviour of eccentrically loaded concrete-encased CFST box columns
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偏心加载混凝土钢管混凝土箱形柱的分析性能

DOI:
10.1680/macr.13.00330
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发表时间:
2014-08
影响因子:
2.7
通讯作者:
Zhao Xiao-Ling
Zhao Xiao-Ling
中科院分区:
工程技术4区
文献类型:
--
作者:
An Yu-Feng;Han Lin-Hai;Zhao Xiao-Ling

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本文对钢管混凝土箱形柱在偏心轴压作用下的受力性能进行了理论研究。采用有限元分析方法对组合柱进行了分析,并利用作者最近报道的试验数据对有限元模型进行了验证。分析了复合材料的性能,包括全范围载荷与横向中间高度挠度、应力分布、柱失效模式以及钢与混凝土之间的相互作用。将钢管混凝土箱形柱与相应的钢筋混凝土柱和钢管混凝土组合柱的性能进行了比较。最后,进行了参数研究,并采用弯矩放大法,提出了偏心受压钢管混凝土箱形柱的设计公式。
This paper presents a theoretical study on the performance of concrete-encased concrete-filled steel tube (CFST) box columns subjected to eccentric axial loading. Finite-element analysis (FEA) was used to analyse the composite columns and experimental data reported recently by the authors was used to verify the FEA modelling. Analysis of the behaviour of the composite, including the full-range load versus lateral mid-height deflection, stress distributions, column failure modes and the interactions between steel and concrete, was carried out. The behaviour of the concrete-encased CFST box columns was compared with that of corresponding reinforced concrete columns and CFST built-up columns. Finally, a parametric study was carried out and the moment magnification approach adopted to propose design formulae for eccentrically loaded concrete-encased CFST box columns.
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