岩土力学Issue(12)：3479-3484,6.
考虑颗粒破碎引起级配演变的粗粒料屈服函数研究
Yielding function for coarse aggregates considering gradation evolution induced by particle breakage
摘要
Abstract
Gradation, one of the most important physical characters of soils, has significant influence on the stress strain response of coarse aggregate. Accurate prediction of the gradation evolution during loading procedure is an essential part for efficient analysis of strength and deformation characteristics of soil structures. Following Einav’s fractal breakage theory, the energy dissipated from particle breakage during loading is assumed to be in direct proportion to the increment of fractal breakage ratio. Method of measuring the gradation evolution during loading as well as a novel yielding model considering gradation evolution of coarse aggregate is then established by employing a well-known energy equation. Investigation of the gradation evolution of coarse aggregates is thus conducted by employing corresponding experimental data from relevant literatures. After that, preliminary discussion of the newly proposed yielding function is also conducted. It is observed that each yield surface during loading corresponds to a specific gradation of coarse aggregate. Moreover, the yield surface is suggested to be a shear strain-based isosurface, of which the shape is mostly determined by shear strain.关键词
粗粒料/级配/分形破碎/屈服面/本构模型Key words
coarse aggregate/gradation/fractal breakage/yielding surface/constitutive model分类
建筑与水利引用本文复制引用
孙逸飞,刘汉龙,杨贵..考虑颗粒破碎引起级配演变的粗粒料屈服函数研究[J].岩土力学,2013,(12):3479-3484,6.基金项目
国家自然科学重点基金（No. U1134207）；国家自然科学青年基金（No.51109068）。 （）
