中柱失效工况下方钢管混凝土柱-组合梁框架抗连续倒塌性能理论与试验研究

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (3) : 76-87.

论文

玄伟1,2，王来2，柳长江1，邢国起1，杨宁3

作者信息 +

Theoretical and experimental study on progressive collapse resistance of concrete filled steel tubular column-composite beam frame under failure condition of middle column

XUAN Wei1,2，WANG Lai2, LIU Changjiang1，XING Guoqi1, YANG Ning3

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文章历史 +

摘要

为研究中柱失效工况下方钢管混凝土柱-组合梁抗倒塌性能，基于对方钢管混凝土柱-组合梁的抗力机制及抗倒塌性能影响因素的分析，建立了方钢管混凝土柱-组合梁抗倒塌分析模型，该模型考虑了梁端柱的约束作用、正负弯矩作用下组合梁弯曲刚度的差异以及楼板与钢梁之间黏结滑移效应等影响因素，并对模型的抗力-变形计算公式进行了推导；设计了一榀2跨1/3缩尺的方钢管混凝土柱-组合梁框架试件并进行静力加载试验，分析了中柱失效后剩余结构的破坏模式、荷载传递机理以及主要的抗力机制。试验结果表明，倒塌过程中结构的抗力经历了从梁机制到悬链线机制的转化，其中压拱机制和悬链线机制可以有效提高结构的倒塌承载能力。最后基于理论与试验结果的对比分析，提出了理论公式的修正方法。

Abstract

In order to study the collapse resistance of concrete filled steel tubular column-composite beam under failure condition of middle column, based on the analysis of resistance mechanism and influencing factors of concrete filled steel tubular column-composite beam, In this paper, an anti-collapse analysis model of concrete-filled square steel tubular column-composite beam was established.The model takes into account the restraint effect of beam end-column, the difference of bending stiffness of composite beam under the action of positive and negative moment and the bond slip effect between floor and steel beam.The resistance-deformation calculation formula of the model was deduced.In this paper, a 2-span 1-scale concrete-filled square steel tubular column-composite beam frame specimen was designed and the static loading test was carried out.The failure mode, load transfer mechanism and main resistance mechanism of the residual structure after the failure of the middle column were analyzed.The test results showed that the resistance of the structure in the process of collapse has experienced the transformation from the beam mechanism to the catenary mechanism, in which the compression arch mechanism and catenary mechanism can effectively improve the collapse bearing capacity of the structure.Finally, based on the comparative analysis of the theoretical and experimental results, the correction method of the theoretical formula was put forward.

导出引用

玄伟1,2，王来2，柳长江1，邢国起1，杨宁3. 中柱失效工况下方钢管混凝土柱-组合梁框架抗连续倒塌性能理论与试验研究[J]. 振动与冲击, 2020, 39(3): 76-87

XUAN Wei1,2，WANG Lai2, LIU Changjiang1，XING Guoqi1, YANG Ning3. Theoretical and experimental study on progressive collapse resistance of concrete filled steel tubular column-composite beam frame under failure condition of middle column[J]. Journal of Vibration and Shock, 2020, 39(3): 76-87

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