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基于ANSYS软件建立了隔板贯通式钢管混凝土梁柱节点有限元模型,研究了剪切破坏模式下节点核心区的传力机制,以及节点核心区组件几何尺寸和楼板作用对节点抗剪承载力的影响。结果表明,在剪切破坏模式下,节点剪力主要由核心区钢管腹板和混凝土承担,隔板和钢管翼缘的作用主要是传递梁端弯矩,核心区混凝土则以斜压杆机制抗剪;隔板厚度和核心区钢管壁厚对节点抗剪承载力有较大影响,而钢梁翼缘厚度和宽度的影响相对较小;楼板能提高节点抗剪承载力,并能影响节点核心区的破坏模式。继而利用优化设计为节点试件的方案设计提供一定参考。
Based on the ANSYS software, the finite element model of the pier-through CFST beam-column joint was established. The transmission mechanism of the core in the shear failure mode and the effect of the core size of the core and the slab on the shear strength of the joint influences. The results show that in the shear failure mode, the joint shear force is mainly borne by the steel pipe webs and concrete in the core area. The function of the diaphragm and the steel pipe flange is mainly to transmit the bending moment at the beam end, Shear; the thickness of the partition wall and the wall thickness of the steel pipe in the core area have a greater influence on the shear strength of the joint, while the influence of the thickness and width of the steel beam flange is relatively small; the floor can improve the shear strength of the joint and can affect the core area Destruction mode. Then use the optimal design to provide some reference for the design of node specimen.