【摘要】 通过对钢管混凝土偏心受压构件的受力特性进行分析,结合核心混凝土的徐变特点,采用继效流动理论及多轴应力状态下混凝土的徐变理论,构造了计算钢管混凝土偏心受压构件徐变的计算方法。此方法较为合理地考虑了多轴应力状态下核心混凝土的特点及钢管混凝土构件徐变的影响因素(如含钢率、材料等级、应力级别等),并引入迭代来计算构件的徐变。计算算例结果与试验结果的对比表明:本文所提出的方法理论可靠、合理。更多还原

【Abstract】 In this paper, a new method is developed to study the creep behavior of Concrete Filled Steel Tubular (CFST) members under eccentric compression. The Elastic Continuation and Plastic Flow material model and the creep theory of concrete under multi-axial stresses are taken into account in the present method. Both the characteristics of core concrete under multi-axial stresses and the influential factors to creep of CFST members are considered. An iterative procedure is given for computing the creep of CFST members. In comparison with experimental data, the present method is shown to be reasonable and reliable.更多还原