Constitutive model of disturbed soil-structure interface within mining subsidence areas

来源期刊:中南大学学报(英文版)2017年第7期

论文作者:夏军武 常虹

文章页码:1676 - 1683

Key words:mining subsidence areas; soil-structure interface; rigid-plastic model; finite element method

Abstract: The characteristics of a disturbed soil-structure interface were studied based on the variation regularities of the disturbed soil within its mining subsidence area using direct shear tests. The effects of the initial moisture content on the shear strength parameters of the soil-structure interfaces were analyzed. The results indicate that the cohesion of the interface initially increased and then decreased as the initial moisture content increased. In addition, the friction angle of the interface decreased as the initial moisture content increased. A constitutive model of the disturbed soil-structure interface, a rigid-plastic model based on the initial void ratio and saturability (VSRP) model, was established based on the results. In order to validate this model, a finite element analysis of DRS-1 direct shear tests was conducted. The finite element model calculations coincided with the results of the DRS-1 direct shear tests. The proposed model also reflected the nonlinear features of the soil-structure interface.

Cite this article as: CHANG Hong, XIA Jun-wu. Constitutive model of disturbed soil-structure interface within mining subsidence areas [J]. Journal of Central South University, 2017, 24(7): 1676-1683. DOI: 10.1007/s11771-017-3574-x.

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