Concrete-filled bimetallic tubes (CFBT) under axial compression: Analytical behaviour
Concrete-filled bimetallic tubes (CFBT) under axial compression: Analytical behaviour
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DOI：
10.1016/j.tws.2017.08.007
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发表时间：
2017-10
影响因子：
6.4
通讯作者：
Y. Ye;Lin-Hai Han;Zixiong Guo
中科院分区：
文献类型：
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作者：
Y. Ye;Lin-Hai Han;Zixiong Guo
钢管混凝土（CFBT）是钢-混凝土组合构件的一种，具有良好的工程应用前景。本文建立了圆形钢管混凝土短柱的三维有限元分析模型，对圆形钢管混凝土短柱的轴压性能进行了研究。FEA预测的精确性通过与从在配套论文中测试的十个CFBT柱样本收集的实验结果进行比较来评估（Ye等人，2016年）[15]。在失效模式、载荷与变形响应、极限强度和两个钢管层的应变发展方面，有限元分析预测与试验结果之间获得了良好的一致性。根据有限元分析结果，研究了组合截面中混凝土和钢筋的应力以及组合截面中各构件之间的相互作用和荷载分配。最后，进行了参数研究，并提出了一个简化的模型，用于计算圆形CFBT短柱的极限承载力。
Concrete-filled bimetallic tubes (CFBT) could be recognized as a type of steel-concrete composite members, and have the potential to be applied in engineering structures. A three-dimensional finite element analysis (FEA) model is established to further study the axial compressive behaviour of circular CFBT stub columns in this paper. The preciseness of the FEA predictions is evaluated by comparison with experimental results collected from ten CFBT column specimens tested in a companion paper (Ye et al., 2016) [15]. Good agreement is obtained between the FEA predictions and the test results in terms of failure pattern, load versus deformation response, ultimate strength, and strain development of the two steel tube layers. In light of the FEA results, the stresses of concrete and steel, as well as the interactions and load distribution between different components of the composite section are investigated. Finally,parametric study is performed and a simplified model is proposed to be used to calculate the ultimate strength of circular CFBT stub columns.