摘要
将土工格栅加筋土作为宏观均匀的各向异性材料 ,在考虑格栅与土之间变形协调、土为满足Mohr Coulomb破坏准则的理想弹塑性材料及格栅为粘弹性材料的条件下 ,假定格栅加筋土宏观应力由土和筋材两种微观应力所组成 ,通过引入格栅的流变模型 ,建立了筋土复合体中格栅的等效应力计算方法 ,并将结果与未考虑流变时的格栅应力法进行了对比分析。
The geogrid-reinforced soil mass is regarded as a marco-homogeneity and anisotropy materials composed of the elasto-plastic soil and visco-elastic geogrids. The soil in the composite mass is of elasto-plastic behavior and its strength obeys the Mohr-Coulomb's criterion of failure while the creep behavior of geogrids is represented by rheological model with a series of a Kevin model and an elastic spring. The equivalent stress calculation of geogrids is established on the basis of fundamental of mechanics of composite material. The results considering rheology are compared with results gained by method with non-rheology.
出处
《岩土工程技术》
2004年第1期23-27,共5页
Geotechnical Engineering Technique
基金
国家教育部跨世纪优秀人才培养计划研究基金项目资助 (教技函 [1999]2号 )
关键词
土工格栅
加筋土
弹塑性
粘弹性
流变模型
geogrids
reinforced soil
elasto-plasticity
visco-elasticity
rheological model
