非共轴次加载面模型及其对地基承载特性的模拟

doi:10.13722/j.cnki.jrme.2020.1061

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Abstract The traditional elasto-plastic models cannot consider the non-coaxial plastic deformation of soils when simulating the bearing capacity of foundations. In this paper，a non-coaxial plastic model was established by introducing the modified non-coaxial theory into the sub-loading surface model，and the model was embedded into ABAQUS software through the user material subroutine interface. Then，the model was used to predict the bearing characteristics of clay foundations with different degrees of over-consolidation. The results show that，when the non-coaxial plasticity is considered，the predicted maximum settlement increases with decreasing the non-coaxial plastic modulus，and that the influence of the non-coaxial plastic modulus on the simulation results is related to the over-consolidation degree of foundation soils. In addition，decreasing the non-coaxial plastic modulus to the shear modulus will have a relatively significant effect on the predicted maximum settlement. Therefore，when the actual non-coaxial plastic modulus is less than the shear modulus，the influence of the non-coaxial plastic deformation should be carefully considered in foundation engineering to ensure safety.

Key words： foundation engineering modified non-coaxial theory sub-loading surface model bearing characteristics of foundation

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	Articles by authors
	KONG Liang1
	2
	WANG Xing2
	LI Xuefeng3

Cite this article:

KONG Liang1,2,WANG Xing2, et al. Non coaxial sub-loading surface model and its application in numerical simulation of foundation bearing characteristics[J]. , 2021, 40(12): 2535-2544.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2020.1061 OR http://rockmech.whrsm.ac.cn/EN/Y2021/V40/I12/2535

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