【摘要】 在对钢管混凝土大偏心受压构件的力学特性和核心混凝土徐变进行分析的基础上,使用多轴应力状态下混凝土徐变及适用于不断卸载状态混凝土徐变的继效流动理论,研究钢管混凝土大偏心受压构件的徐变。通过确定初始条件和构件混凝土的徐变模型,建立计算构件徐变的方法并使用它对含钢率、偏心率及紧箍应力等构件徐变的影响因素进行分析。并引入迭代的方法对混凝土徐变的时效性质进行模拟。应用该方法得到的结果是合理的。更多还原

【Abstract】 This paper focuses on the creep analysis of eccentrically-compressed concrete filled steel tubular members. The creep theory of concrete under multi-axial stresses and the elastic continuation and plastic flow theory of concrete creep are adopted in the analysis. By determination of the initial conditions and construction of a creep model for the members, a method is developed. The influence of steel ratio, eccentric ratio and confined stress on the creep of eccentrically compressed concrete filled steel tubes is studied. Iterative process is introduced into the model to simulate the time-dependent property of concrete creep.更多还原