弹塑性黄土微结构与动变形模型的建立与分析

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Abstract Analysis of dynamic properties of loess from microstructure perspective is one of the most important direction to explore loess constitutive model. According to the micromechanism that overhead pore is the dynamic factors causing the residual deformation of elasto-plastic loess，combined with air-solid surface theory and hyperbolic formula，the pore-overhead seismic subsidence models is established by using data such as dynamic triaxial test parameters，overhead pore area and confining pressure. Computational formula for residual deformation coefficient of loess under dynamic loading is acquired in the model. By test contrast of the main loess deposition samples，the residual deformation coefficient calculated by the computational formula is very closed to the experimental value. The comprehensive analysis results show that the one-dimensional micro-pore dynamic residual model can well reflect the residual deformation actual situation induced by loess microstructure difference under different confining pressures，water contents and dry densities. The model can generally reflect the characteristics of elasto-plastic deformation of loess.

Key words： soil mechanics loess microstructure seismic subsidence elasto-plastic deformation

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	Articles by authors
	DENG Jin1
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	WANG Lanmin2
	WU Zhijian1
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Cite this article:

DENG Jin1,2,3, et al. ESTABLISHEMENT AND ANALYSIS OF ELASTO-PLASTIC LOESS MICROSTRUCTURE AND DYNAMIC DEFORMATION MODEL[J]. , 2013, 32(s2): 3995-4001.

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https://rockmech.whrsm.ac.cn/EN/Y2013/V32/Is2/3995

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