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为研究型钢再生混凝土梁柱中节点的受剪承载力,在型钢再生混凝土梁柱中节点试验研究的基础上,对其受剪机理进行了分析。结果表明:型钢再生混凝土梁柱中节点的破坏模式主要是剪切斜压破坏,其受力机理为钢筋再生混凝土斜压杆,钢“框架-剪力墙”和钢筋空腹桁架的综合作用,将节点域的受剪承载力分为三部分,即节点域型钢腹板“剪力墙”和翼缘“框架”、节点域再生混凝土斜压杆、节点域箍筋的受剪承载力;通过对试验数据的回归分析,提出型钢再生混凝土梁柱中节点受剪承载力计算公式,该计算式不仅考虑了梁、柱对节点域实际受力状态的影响,而且考虑了翼缘“框架”对再生混凝土的约束作用,采用计算式得到的结果与试验值吻合较好。
In order to study the shear bearing capacity of the nodes in beam-column of reclaimed concrete beam, the shear mechanism of the reclaimed concrete beams is analyzed based on the experimental study of the nodes in the reclaimed concrete beams. The results show that the failure mode of the nodes in the beam-column of steel reinforced concrete beam is mainly shear baroclinic failure. The mechanical mechanism is the combined effect of steel bar, steel frame, shear wall and steel truss. The shear capacity of the joint domain is divided into three parts, namely, the node domain steel webs “shear wall” and the flanges “” frame “, the node domain reclaimed concrete bar, the shear strength of the node field stirrups Through the regression analysis of test data, the formula of shear bearing capacity of beam-column in steel reinforced concrete beam is put forward. The formula not only considers the influence of beam and column on the actual stress state of node, but also considers the influence of flange ”Restrictions on recycled concrete, the results obtained by the formula and the experimental value is in good agreement.