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钢筋混凝土框架节点受力情况复杂,破坏形式多样,已有的节点抗震设计理论及规范中没有给出明确的节点破坏模式分化的界定方式。选取了典型的足尺框架节点,分析了不同弯矩调幅、混凝土抗压强度、轴压比及剪跨比影响下节点的抗震性能,并在此基础上提出了节点破坏模式分化参数的设计计算方法,进一步明确了节点破坏模式分化的影响因素,为实现节点基于性能的抗震设计提供了理论基础。
The stressed condition of the RC frame joints is complex and the damage forms are varied. The definition of the failure modes of the node failure is not given in the existing seismic design theory and specification of the joints. The typical full-scale frame joints are selected and the seismic performance of joints under the influence of different bending moment, compressive strength of concrete, axial compression ratio and shear-span ratio is analyzed. Based on this, the design calculation of the failure modes of joints Method to further clarify the influencing factors of node failure mode differentiation, which provides a theoretical basis for the performance-based seismic design of nodes.