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Abstract:
To enhance the seismic performance of prefabricated shear walls and realize structural reparability after earthquake-induced damage,a repairable steel-connection precast shear wall(RS-PSW)is proposed. It could be achieved that the damage to the structure is concentrated on the steel connection by replacing the vulnerable bottom area of shear walls with steel-connection area. The function of reparability is implemented by replacing damaged steel-connection members after earthquakes. The ordinary concrete shear wall(SW0),specimen RS-PSW1(initial loaded),and specimen RS-PSW2(loaded after seismic damage)are subjected to low circumferential reciprocal loading tests to compare and analyze the failure modes,hysteretic behavior,stiffness and bearing capacity degradation,energy dissipation and seismic damage reparability of RS-PSW. The results show that compared with SW0,RS-PSW1 exhibits a sharp reduction of cracks in the upper precast concrete wall when the displacement angle reached 1.43%,and the deformation is concentrated in the steel-connection area. Compared with SW0,the bearing capacity and stiffness of repaired specimen RS-PSW2 have slightly decreased,but the ductility and energy dissipation have greatly improved,the failure displacement angle of RS-PSW2 reaches 2.67%,which is 66.7% higher than SW0. It indicates that RS-PSW2 presents a better deformation capacity. The seismic performance indexes of specimen RS-PSW2 under reloading are basically the same as those under initial loadign,which verifies that RS-PSW can realize the repairable function of earthquake-induced damage,and the seismic performance of the structure can be quickly restored by replacing the damaged steel connectors. © 2023 Nanjing University of Aeronautics an Astronautics. All rights reserved.
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振动工程学报
ISSN: 1004-4523
CN: 32-1349/TB
Year: 2023
Issue: 6
Volume: 36
Page: 1579-1589
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ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 0
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