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通过分析钢筋混凝土柱-钢梁(RCS)梁柱节点试验和有限元分析结果,对P-M模型进行了修正,提出内混凝土考虑承压变形和剪切变形的节点设计模型。该模型认为RCS节点变形是三维空间变形,应将内混凝土、外混凝土分开,分别按处于平面应变状态来处理,内混凝土变形大于外混凝土变形,除了剪切变形之外,内混凝土还有很大承压变形。基于设计模型和有限元分析结果提出RCS边柱节点名义强度计算公式和设计公式。取内混凝土总变形为2%时节点的抗剪强度为名义强度。这些公式可供我国制定规范所参考。
Through the analysis of RCS beam-column joint test and finite element analysis results, the P-M model was modified and the joint design model of internal concrete considering bearing deformation and shear deformation was proposed. The model considers that the deformation of RCS nodes is three-dimensional deformation. The inner concrete and outer concrete should be separated and separately treated in the plane strain state. The deformation of the inner concrete is larger than the deformation of the outer concrete. In addition to the shear deformation, the inner concrete has a large Pressure deformation. Based on the design model and finite element analysis results, the calculation formulas and design formulas of nominal strength of RCS side column joints are proposed. When the total internal deformation of concrete is 2%, the shear strength of joints is nominal strength. These formulas can be referenced by our country to formulate norms.