Behavior and calculation on concrete-filled steel CHS (circular hollow section) beam-columns
Behavior and calculation on concrete-filled steel CHS (circular hollow section) beam-columns
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DOI：
10.12989/scs.2004.4.3.169
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发表时间：
2004-06-01
影响因子：
4.6
通讯作者：
Zhao, XL
中科院分区：
文献类型：
--
作者：
Han, LH;Yao, GH;Zhao, XL
建立了圆形空心截面钢管混凝土压弯构件的力学模型。提出了一种统一的理论，其中引入约束因子（）来描述钢管和填充混凝土之间的组合作用。预测的荷载-变形关系与试验结果吻合较好。利用该理论模型研究了影响钢管混凝土压弯构件极限承载力的重要参数。参数和实验研究提供了信息的发展公式计算的组合梁-柱的极限强度。与现有规范（如LRFD-AISC-1999、AIJ-1997、BS 5400 -1979和EC 4 -1994）的梁柱强度预测值进行了比较。
A mechanics model is developed in this paper for concrete-filled steel CHS (circular hollow section) beam-columns. A unified theory is described where a confinement factor () is introduced to describe the composite action between the steel tube and the filled concrete. The predicted load versus deformation relationship is in good agreement with test results. The theoretical model was used to investigate the influence of important parameters that determine the ultimate strength of concrete-filled steel CHS beam-columns. The parametric and experimental studies provide information for the development of formulas for the calculation of the ultimate strength of the composite beam-columns. Comparisons are made with predicted beam-columns strengths using the existing codes, such as LRFD-AISC-1999, AIJ-1997, BS5400-1979 and EC4-1994.