Study on Design and Seismic Performance of Joint Between Prefabricated Steel Frames and Concrete Walls
To solve the seismic design problem of the joint between prefabricated steel frames and concrete walls,the Beixin'an Community Elderly and Disabled Service Center in Shijingshan District was taken as the research object.Two different connection designs of the joint between prefabricated steel frames and concrete walls were proposed,and the physical models were established via laboratory tests,and the dynamic response characteristics of the models were analyzed,which subjected to horizontal low cycle loads.The results show that the hysteresis curve of the hook bolt connection model exhibits anti S-shaped development and pinching phenomenon,while the high-strength bolt connection model is full and round,with energy dissipation coefficient and equivalent viscous damping coefficient 1.19 times that of the former;the skeleton curves of the models with two connection methods can be divided into three stages.The yield load,peak load,and ultimate load of the high-strength bolt connection model are all increased by more than 20%compared to the hook bolt connection model;the shape of the secant stiffness curve for the two working conditions is basically the same,forming an inverse 'S' shape.The initial stiffness of the high-strength bolt connection model is much greater than that of the hook bolt connection model,and the displacement ductility coefficient is also significantly increased.
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