基于静力推覆分析的穿越地裂缝浅埋地铁车站地震破坏模式研究

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Abstract The earthquake damage characteristics of the shallow buried subway station crossing the ground fissure (SSGF) were explored through the shaking table test. Then, considering the nonuniformity of the dynamic response of the ground fissure site, a pushover analysis method for the SSGF was used to study the earthquake damage mode of the SSGF. The results show that the pushover method can realistically simulate the activity of the ground fissure site and the damage characteristics of the SSGF in the earthquake. Under the horizontal seismic action, the mutual compression and separation activity mainly occurs in the hanging wall and foot wall, in which the mutual compression will exert the compression-bending effect on the central columns of the SSGF. The horizontal shear deformation of the soil is the main external factor of structural damage, and the additional compression-bending effect will further increase the axial compression ratio of the central column, reduce its deformation capacity, and accelerate the seismic damage of the SSGF. Under the unique deformation of the ground fissure site, the horizontal shear deformation capacity of the columns in the bottom of the SSGF is relatively weak, and the shear force of the structural members shows an obvious spatial distribution pattern. Therefore, the central column at the bottom of the SSGF in the hanging wall is the key seismic member of the SSGF. The research results have important references for the seismic design of these structures.

Key words： ground fissure subway station pushover analysis failure mode

Received: 02 November 2022 Published: 15 January 2024

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	XIONG Zhongming1
	2
	CHEN Zhi1
	CHEN Xuan1
	2
	ZHENG Kun1
	A Xin3
	4

Cite this article:

XIONG Zhongming1,2,CHEN Zhi1, et al. Seismic failure mode of shallow buried subway station crossing ground fissures based on static pushover analysis[J]. JOURNAL OF VIBRATION AND SHOCK, 2024, 43(1): 54-63.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2024/V43/I1/54

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