中文摘要：

该文建立了三维非线性有限元模型，对带楼板的钢管混凝土叠合柱一钢梁节点抗震性能进行了研究。该有限元模型考虑了材料和几何的非线性、混凝土在往复荷载作用下的累积损伤及钢．混凝土问的接触关系等。利用已有节点试验结果，对建立的数值模型进行了验证。利用验证的有限元模型细致分析了带楼板钢管混凝土叠合柱一钢梁节点在梁端往复荷载作用下的工作机理。分析结果表明：节点在梁端往复荷载作用下，核心区的内、外混凝土形成“斜压杆”，核心区的钢管和钢筋笼屈服并与核心区混凝土共同抵御外力。

英文摘要：

This paper presents a nonlinear 3-D finite element （FE） study on the seismic behaviour of concrete-encased concrete-filled steel tubular column to steel beam joints with RC slabs. The FE model considers material and geometric nonlinearity, the cumulative damage of concrete and the interaction between concrete and steel. The proposed finite element model is verified by previous experimental results. The failure mechanism of such composite joints is analyzed using this model. It is found that a compression strut is formed in the concrete panel zone to resist the shear force together with the steel tube and reinforcement cage in the panel zone.