Performance of concrete-encased CFST stub columns under axial compression
Performance of concrete-encased CFST stub columns under axial compression
复制标题
轴压混凝土钢管混凝土短柱性能
DOI：
10.1016/j.jcsr.2013.10.019
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发表时间：
2014-02-01
影响因子：
4.1
通讯作者：
An, Yu-Feng
中科院分区：
文献类型：
--
作者：
Han, Lin-Hai;An, Yu-Feng
外包式钢管混凝土结构是钢-混凝土组合结构的一种，在中国地区的高层建筑和桥梁结构中得到越来越多的应用。对钢管混凝土轴心受压短柱的受力性能进行了研究。为了分析组合柱的受力性能，建立了有限元分析模型。考虑了材料的非线性和混凝土与钢管的相互作用。用一组试验数据对有限元模型进行了验证。对钢管混凝土短柱的荷载-变形关系进行了全过程分析。研究了钢管混凝土与外层混凝土、核心混凝土与钢管的相互作用。分析了钢管混凝土柱与普通钢管混凝土柱、钢筋混凝土柱的区别。然后利用有限元模型进行了参数研究。最后，提出了组合短柱极限强度的简化计算公式。(C)2013爱思唯尔有限公司。保留所有权利。
Concrete-encased CFST is a type of steel-concrete composite construction, and has an increasing trend in being used in high-rise building and bridge structures in China. This paper studies the behavior of concrete-encased concrete filled steel tube (CFST) stub columns under axial compression. A finite element analysis (FEA) modeling is developed to analyze the behavior of the composite columns. The material nonlinearity and the interaction between concrete and steel tube are considered. A set of test data are used to verify the FEA modeling. Full range analysis on the load versus deformation relations of the concrete-encased CFST stub columns is presented. The interactions between the outer concrete and the steel tube of CFST, as well as the core concrete and the steel tube of CFST are investigated. The differences of concrete-encased CFST columns, conventional CFST and RC columns are analyzed. A parametric study is then carried out by using the FEA modeling. Finally, simplified formulas are suggested for predicting the ultimate strength of the composite stub columns. (C) 2013 Elsevier Ltd. All rights reserved.