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FE-investigations of micro-polar boundary conditions along interface between soil and structure

机译:沿土壤与结构界面的微极边界条件的有限元研究

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摘要

The interface between granular bodies and structures is analysed with the finite element method and a micro-polar hypoplastic constitutive model. Quasi-static shearing of an infinitely long and narrow granular strip between two rigid walls of different roughness under conditions of free dilatancy and constant vertical pressure is investigated. The constitutive model can reproduce the essential features of granular bodies during shear localization. To model the different roughness of the interface, micro-polar boundary conditions are proposed taking into account the asperity of the wall roughness and grain diameter. Some emphasis is given to the influence of the wall roughness on the thickness of shear zone and the mobilization of wall friction.
机译:用有限元方法和微极性的次生本构模型分析了粒状体与结构之间的界面。研究了在自由膨胀和恒定垂直压力条件下,两个粗糙度不同的刚性壁之间无限长且狭窄的颗粒状带的拟静态剪切。本构模型可以再现剪切局部化过程中粒状体的基本特征。为了模拟界面的不同粗糙度,考虑到壁粗糙度和晶粒直径的粗糙度,提出了微极性边界条件。重点介绍了壁面粗糙度对剪切区厚度和壁面摩擦力的影响。

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