Behaviour of tapered concrete-filled double skin steel tubular (CFDST) stub columns
Behaviour of tapered concrete-filled double skin steel tubular (CFDST) stub columns
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DOI：
10.1016/j.tws.2012.03.019
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发表时间：
2012-08-01
影响因子：
6.4
通讯作者：
Zhao, Xiao-Ling
中科院分区：
文献类型：
--
作者：
Li, Wei;Ren, Qing-Xin;Zhao, Xiao-Ling
近年来，中国输电铁塔相继采用了变截面双壁钢管混凝土柱。然而，缺乏关于这类成员行为的信息。为此，本文开展了CFDST轴压变截面短柱的研究工作。参数包括锥角和截面轮廓。建立了一个有限元分析(FEA)模型来预测变截面杆件的受力性能。结果表明，尽管存在锥角，钢管和夹层混凝土仍能很好地协同工作。锥形CFDST短柱的破坏模式与直形短柱相似，破坏发生在最小截面附近。通过应力分析，讨论了变截面杆件的约束效应。最后，提出了CFDST变截面短柱的极限强度计算公式。(C)2012爱思唯尔有限公司。保留所有权利。
Recently, tapered concrete-filled double skin steel tubular (CFDST) columns have been applied in electricity transmission towers in China. However, there is Rill lack of information on the behaviour of such kind of members. This paper thus carried out the investigation on axially loaded tapered CFDST stub columns. The parameters included the tapered angle and the sectional profile. A finite element analysis (FEA) model was developed to predict the behaviour of the tapered member as well. The results showed that the steel tubes and the sandwiched concrete could work together well despite the tapered angle. The failure mode of the tapered CFDST stub column was similar to that of the straight one, and the failure occurred near the smallest section. The confinement effect of the tapered member was discussed by using the stress analysis. Finally, formulas were suggested for the calculation on the ultimate strength of the tapered CFDST stub column. (C) 2012 Elsevier Ltd. All rights reserved.