非饱和土地基振动响应分析

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Abstract The development of the wave theory of unsaturated porous media makes the dynamic analysis of unsaturated soil foundation possible.In this paper, an explicit finite element method for the existing dynamic formulation of unsaturated porous media was proposed.The decoupling-technique was used in the explicit finite element method.Based on the method, the computational program was written and verified by comparing with the analytical solution after degeneration.The method was applied to analyze the dynamic responses of a strip rigid and flexible foundation in an unsaturated porous medium separately, and the influence of saturation on the dynamic responses of unsaturated soil foundation was discussed.The computational results indicate that, the dynamic response of the rigid foundation is larger than that of flexible foundation under the same conditions.For both kinds of foundations, the dynamic response for Sr=1 is smaller than that for Sr<1.For the rigid foundation, the vertical displacement of each point decreases and the horizontal displacement increases with saturation level when Sr<1.For the flexible foundation, saturation has limited influence on the dynamic response of unsaturated soil foundations.

Key words： unsaturated porous media vibration response of foundation explicit finite element method

Received: 05 December 2017 Published: 15 June 2019

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	LI Weihua1
	WANG Wenqiang2

Cite this article:

LI Weihua1,WANG Wenqiang2. Vibration response analysis of an unsaturated soil foundation[J]. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(12): 182-190.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2019/V38/I12/182

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