摘要
根据作者和国内外研究者有关钢管混凝土粘结性能的试验研究,对钢管混凝土粘结应力沿界面长度的分布规律进行了分析,从理论上推导出了钢管应力、钢管与混凝土的粘结应力和相对滑移之间的相互关系。通过数学分析得到了这三者的解析表达式。在理论研究的基础上,给出了随不同位置变化的钢管与混凝土粘结应力和相对滑移的本构关系,推导出了反应这种变化规律的位置函数,得到了与端部滑移及位置均有关的钢管与混凝土粘结应力的表达式。分析了含钢率对粘结应力的影响。该本构关系可为用有限元进一步分析钢管混凝土结构的非线性性能提供参考和依据。
According to the former experimental researches of the author and students here and abroad on the bond slip between the concrete and steel tube, the distribution of the bond stress along interface length between the concrete and steel tube in CFST was analyzed in detail. For accurately presenting the bond-slip relationship, the mutual relations among stresses of the steel tube, the bond stress and relative slip between the steel tube and concrete are first deduced through theoretical analysis, and then the equations of stress in the steel tube, bond stress, and relative slip are derived mathematically. On the basis of these equations and the pull out test data, the position functions reflecting the variation of the bond-slip relationship at different positions are proposed. The bond stress expression obtained in this study related not only to the relative slip, but also to the different position. The influence of steel ratios to bond stress was analyzed. This constitutive relationship can be contributed to the further analysis of nonlinear behavior of the CFST structures by Finite Element method.
出处
《工程力学》
EI
CSCD
北大核心
2009年第10期74-78,共5页
Engineering Mechanics
基金
国家自然科学基金项目(50478044)
关键词
钢管混凝土
粘结应力
相对滑移
剪力传递长度
本构关系
concrete filled steel tube
bond stress
relatively slip
shearing force transfer length
constitutive relationship
