功能可恢复强脊框架结构抗震性能研究

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Abstract Based on the strongback mechanism, damage control, and replaceable concept, an innovative earthquake resilient strongback-frame structure is proposed to minimize earthquake-induced damage and facilitate quick and economical post-earthquake repairs. To investigate the seismic performance and resilience of the strongback-frame structure, pushover analysis on five structural models was conducted with Sap2000 software. Particular emphasis was taken on the damage mechanism, damage evolution, deformation characteristics, seismic performance, and seismic resilience of the strongback-frame structure. A two-stage calculation method for the residual deformation is proposed to evaluate the seismic resilience of structures subjected to different magnitude earthquakes. The results show that the strongback system can effectively control the lateral deformation pattern of the structure, and the story drift ratio and damage distribute uniformly, which can avoid the formation of the weak-story failure mechanism and improve the seismic performance and collapse resistance of the structure. The strongback system can also effectively mobilize the reserve capacity of the overall structural components, which enhances the overall performance. The stiffness, strength, and energy consumption capacity of the strongback frame are significantly improved, and the pushover curves do not appear the strength softening behavior. After reasonably graded damage design, the replaceable energy dissipation components set in the strongback frame play the first line of defense role to reduce the structural damage and residual deformation, effectively improving the structure's seismic resilience.

Key words： earthquake resilience strongback system(SBS);replaceable energy dissipation component pushover analysis damage control residual deformation

Received: 03 April 2023 Published: 28 March 2024

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	Articles by authors
	HUANG Qunxian1
	2
	LIN Congying1
	2
	LIU Yang1
	2
	HUANG Jun3

Cite this article:

HUANG Qunxian1,2,LIN Congying1, et al. Seismic performance of an earthquake resilient strongback-frame structure[J]. JOURNAL OF VIBRATION AND SHOCK, 2024, 43(6): 1-10.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2024/V43/I6/1

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