水泥土细观破裂过程的损伤本构模型  

A damage constitutive model of cemented soil on meso-fracture process testing

作　　者：陈四利[1] 宁宝宽[1] 鲍文博[2] 金生吉[2] 

机构地区：[1]中国科学院武汉岩土力学研究所,武汉430071 [2]沈阳工业大学建筑工程学院,沈阳110023

出　　处：《岩土力学》2007年第1期93-96,共4页Rock and Soil Mechanics

基　　金：中国科学院武汉岩土力学研究所岩土力学重点实验室资助课题No.Z110403);国家自然科学基金资助(No.50204009)。

摘　　要：根据对饱水环境中水泥土力学特性的宏观试验和细观破裂过程试验研究,建立了水泥土细观孔隙损伤变量和损伤本构模型,该水泥土的损伤变量不仅与水泥土的初始损伤有关,而且与水泥土微小孔隙中的孔隙水的密度有关,所建立的损伤本构模型与饱水情况下水泥土的单轴压缩试验曲线进行了对比,分析结果表明,所提出的水泥土细观孔隙损伤本构模型与试验值基本吻合,很好地描述了水泥土的损伤演化特性。On the base of macroscopic and meso-scopic testing on cemented soil in the situation of saturated with water, a damage evolving variable is proposed corresponding with a meso-damage constitutive model established. Not only initial density of water but also initial damage of cemented soil has influence on damage evolving variable. Compared with experimental curves of cemented-soil, it is shown that the damage constiutive model has in good coincidence with the testing results. And the constitutive model can describe the damage characteristic of cemented soil saturated with water.

关 键 词：水泥土 细观孔隙 损伤变量 本构模型 

分 类 号：TU449[建筑科学—岩土工程]