>> 自然科学版期刊 >> 2015年02期 >> 正文
土的剪切动态空间滑动面及其强度准则分析
供稿: 陈昌禄;邵生俊;王有凯 时间: 2018-11-19 次数:

作者:陈昌禄;邵生俊;王有凯

作者单位:毕节学院土木建筑工程学院西安理工大学岩土工程研究所河南理工大学土木工程学院

摘要:提出了多种动态空间滑动面及其相应的强度准则,分析了不同强度准则应力空间描述的强度破坏面,探讨了在多种动态空间滑动面下土强度准则的变化可能性及实用性。结果表明:对于方次动态空间滑动面,随着方次越高,其动态空间滑动面越垂直于小主应力坐标轴,平行于大主应力和中主应力平面,空间面上的正应力越来越接近于小主应力,而剪应力越来越退化;对于开方次空间滑动面,随着开方次越高,其空间滑动面越接近于正八面体面,空间面上的正应力和剪应力越来越平均化;对于方次空间滑动面强度准则,随着方次越高,其对应强度准则破坏面的规律性越来越差,强度准则随参数的变化也越来越敏感,只有在特定参数条件下其空间面才具有较好的规律性;对于开方次空间滑动面,随着开方次越高,越来越均化了三个主应力的贡献,开方次的次数和土的结构性强弱相关。

基金:国家自然科学基金资助项目(41272320);贵州省自然科学基金资助项目(黔教合J字[2013]2011);

关键词:动态空间滑动面;方次;强度准则;强度破坏面;

DOI:10.16186/j.cnki.1673-9787.2015.02.025

分类号:TU43

Abstract:This paper proposed a variety of dynamic spatially mobilized shear planes and the corresponding strength criteria, analyzed strength failure spatial plane in different strength criterion stress, discussed the possibility of those strength criterions' variation and the practicality, The results showed that for the power dynamic spatially mobilized plane, its dynamic spatially mobilized plane is more perpendicular to the minor principal stress axes with higher power times, and parallel to the major principal stress and principal stress plane, that the normal stress on the spatially mobilized plane is more closer to the minor principal stress, and that the shear stress is increasing degradation; For the root dynamic spatially mobilized plane, its spatially mobilized plane is decent to a regular octahedron with the higher root times, and the normal stress and shear stress have been more averaged; For the power dynamic spatially mobilized plane strength criterion, the regularity of its strength criterion failure surface is also growing worse with higher power times, and the strength criteria parameters are increasingly sensitive to change, and its failure surface has the better regularity only in specific parameters; For the power dynamic spatially mobilized plane, its failure surface is getting closer to the cone failure surface with increasing homogenization of the contribution of the three principal stresses with higher power times.

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