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圆钢管混凝土轴心受压构件徐变分析的比较

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Keywords: 桥梁工程,圆钢管混凝土轴心受压构件,比较分析,徐变模型,继效流动理论,龄期调整有效模量法,长期荷载

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Abstract:

？在对钢管混凝土构件徐变研究进行回顾的基础上,应用考虑多轴受压状态下的混凝土徐变理论建立圆钢管混凝土轴心受压构件徐变模型,分别采用继效流动理论和龄期调整有效模量法对构件的徐变进行分析,通过迭代计算得到基于2种理论方法的圆钢管混凝土轴心受压构件的徐变,并与试验所得的回归公式计算结果进行比较。通过对比,指出了2种理论的差异性。结果表明:在钢管混凝土轴心受压构件的徐变计算中,继效流动理论具有较高的精度。

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