钢管混凝土轴心受压构件徐变分析

Creep analysis of axial compression CFST

在对钢管混凝土轴心受压构件的轴压力学特性和核心混凝土徐变分析的基础上,从变形协调条件出发,通过引入混凝土换算弹性模量,推导了钢管混凝土轴压构件应力重分布计算方法。此方法较好地考虑了钢管混凝土构件徐变因素(含钢率、应力级别、材料等级)的影响,并分析研究了不同影响因素条件下钢管混凝土结构的徐变特性。针对钢管混凝土受力特点,研究表明,运用该方法计算在轴心受压状态下徐变所引起的钢管混凝土截面应力重分布是合理的。

This paper focus on the creep of analysis axial compression CFST, starting from the condition of deformation compatibility, by introducing the conversion elastic modulus of concrete, derivation of the CFST stress distribution calculation method. This methods better consider the influence of steel ratio, bestress level and material level, which study CFST creep characteristics under the various conditions. According to the CFST stress characteristic research shows that stress distribution is reasonable calculation of CFST creep under axial pressure caused by the application of this method.