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圆端形钢管混凝土轴压短柱受力性能研究

, PP. 57-63

Keywords: 桥梁工程,圆端形钢管混凝土,试验研究,极限承载力,宽厚比,套箍作用系数

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Abstract:

?为研究圆端形钢管混凝土(CFRT)轴压短柱的力学性能,对4个圆钢管混凝土(CFT)轴压短柱和10个圆端形钢管混凝土轴压短柱进行试验研究,探讨了不同宽厚比和钢管厚度对其极限承载力的影响,应用ABAQUS有限元软件进行三维实体单元建模,对圆端形钢管混凝土轴压短柱进行非线性有限元分析;基于ABAQUS参数分析,考虑宽厚比对套箍作用系数的影响,建立了圆端形钢管混凝土轴压短柱极限承载力实用计算公式。结果表明:在其他条件相同的情况下,圆端形钢管混凝土轴压短柱的极限承载力随钢管壁厚及圆端形宽的增大而增大;随着圆端形宽厚比的增加,圆端形钢管混凝土轴压短柱的约束效应减弱,核心混凝土轴向应力的提高程度减缓;计算结果与试验结果较为吻合。

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