钢管混凝土叠合柱节点环梁受弯承载力计算方法

发布时间：2018-01-16 20:13

本文关键词：钢管混凝土叠合柱节点环梁受弯承载力计算方法　出处：《建筑结构学报》2015年02期 　论文类型：期刊论文

【摘要】：钢管混凝土叠合柱环梁节点是一种连接叠合柱与钢筋混凝土梁的连接节点,其环梁受弯承载力计算方法有待研究。考虑管外混凝土的轴压作用,采取极限平衡法对环梁破坏隔离体受力分析,对现有钢管混凝土柱节点环梁受弯承载力计算方法进行了修正,使其更加适用于钢管混凝土叠合柱节点环梁,计算结果与静力试验结果对比显示,后者高约28%。根据试验结果研究对公式进行修正,采用ABAQUS有限元静力模型对不同轴压比下环梁的受弯承载力公式进行了验证,对比显示有限元分析结果略高于修正后的计算值,二者吻合较好。结果表明,考虑轴压力修正后的公式可以用于钢管混凝土叠合柱节点环梁受弯承载力的计算,公式计算结果偏于保守。
[Abstract]:Concrete-filled steel tube (CFST) composite column ring beam joint is a kind of connection joint between composite column and reinforced concrete beam. The calculation method of flexural bearing capacity of ring beam needs to be studied. The axial compression effect of concrete outside pipe is considered. The ultimate equilibrium method is adopted to analyze the failure isolator force of ring beam, and the existing calculation method of flexural bearing capacity of ring beam with concrete-filled steel tubular column joint is modified to make it more suitable for concrete filled steel tube composite column joint ring beam. The comparison between the calculated results and the static test results shows that the latter is about 28. The formula is modified according to the experimental results. ABAQUS finite element static model is used to verify the flexural bearing capacity formula of ring beam under different axial compression ratio. The comparison shows that the result of finite element analysis is slightly higher than the revised calculation value. The results show that the modified formula can be used to calculate the flexural bearing capacity of concrete-filled steel tube (CFST) composite column joints, and the calculation results are conservative.
【作者单位】：同济大学土木工程防灾国家重点实验室;中船第九设计研究院工程有限公司;
【基金】：国家自然科学基金项目(51322803) “十二五”国家科技支撑计划(2012BAJ13B02)
【分类号】：TU398.9
【正文快照】： 0引言钢管混凝土叠合柱结构具有承载力大、延性好等优点,在高层建筑结构中广为采用[1-3]。钢管混凝土叠合柱结构体系中的框架梁可以是钢-混凝土组合梁、钢梁和钢筋混凝土梁,对于钢-混凝土组合梁和钢梁,可以通过钢结构的连接方法与钢管混凝土叠合柱连接;对于钢筋混凝土梁,规范

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