To enhance the seismic performance of structures with precast cladding panel,a new semi-rigid energy dissipation connection node was proposed based on the deformation characteristics of precast cladding panels with point-supported nodes.By combining the friction energy dissipation mechanism and the metal bending mechanism,the SEDC and the main structure can achieve the normal use state and the rigid connection under small earthquakes,and the flexible energy dissipation connection under large earthquakes.Three groups of nine SEDC test specimens were designed and tested under monotonic loading,low-cycle cyclic loading,and low-cycle fatigue loading.The semi-rigid behavior,hysteresis performance,bearing capacity,energy dissipation capacity,ductility and low cycle fatigue performance of the SEDC were analyzed.The results show that the SEDC has significant semi-rigid behavior,a full hysteresis curve,stable bearing capacity,good energy dissipation capacity,and excellent deformation capability.The bending element and friction element demonstrate good collaborative working performance.Based on the test results,a numerical analysis model of the SEDC was established to analyze the influence of parameters of bending and friction element on its mechanical behavior.The calculation method of node reaction of precast cladding panel under various working conditions was analyzed,and the coordinated design method of precast cladding panel and main structure was proposed based on the semi-rigid behavior of SEDC.
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