可液化场地中复杂异跨地铁地下车站结构的地震反应分析

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Abstract Foundation liquefaction is one of the important causes for serious damage of subway underground station structure in earthquake. However,there is a little research on the seismic response of subway underground station structure in liquefiable sites at present. The research on the seismic response of large and complex underground station structures with unequal spans is even more rare. In this paper, by introducing the large deformation constitutive model of sand liquefaction and using the finite element mesh adaptive adjustment technique to overcome the distortion of soil mesh large deformation, a finite element numerical model of static and dynamic coupling nonlinear interaction between liquefied site soil and complex unequal span subway station structure was established. The distribution characteristics of site liquefaction, floating characteristics of unequal-span station structure, displacement settlement and vector characteristics of surrounding site, lateral deformation and seismic damage characteristics of the interaction system were analyzed. The seismic response law of the interaction system and the seismic failure characteristics of large-scale unequal-span underground structures in liquefied foundation were preliminarily revealed. The research results help to improve the understanding of the seismic response of unequal-span subway station structures in liquefied sites and the seismic design methods.

Key words： subway station unequal-span underground structure sand liquefaction seismic response seismic performance

Received: 11 September 2018 Published: 28 March 2020

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	Articles by authors
	WANG Jianning1
	2
	FU Jisai3
	ZHUANG Haiyang3
	DOU Yuanming1
	MA Guowei1

Cite this article:

WANG Jianning1,2,FU Jisai3, et al. Seismic response analysis of complex subway station structure with unequal-span in liquefiable foundation[J]. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(7): 170-179.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2020/V39/I7/170

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