砂土有限特征比模型演化规律与参数试验分析  

Test and analysis of evolution law and parameter of a finite characteristic ratio constitutive model

作　　者：李彰明[1] 鞠海燕[1,2] 

机构地区：[1]广东工业大学岩土工程技术开发中心,广州510090 [2]南昌工程学院,南昌330099

出　　处：《岩土力学》2006年第S2期1161-1165,共5页Rock and Soil Mechanics

基　　金：广东省自然科学资金资助(项目编号:20010055与04009477)

摘　　要：基于有限特征比理论(FCRT),针对构建的 FCRT 模型,通过试验寻求砂土变形演化规律及模型参数值:该模型理论计算与试验结果对比表明,二者具有很好的一致性,模型客观合理地描述了传统理论模型难以描述的客观现象—不同内部颗粒尺寸、而相同外部尺寸,砂样的不同变形特征,诸如应力等条件一定时,较粗颗粒砂样应变较大。The evolution law and parameters of the model based on finite characteristic ratio theory(FCRT)are determined through the triaxial tests for coarse,medium and fine sands;the stress-strain relation of triaxial tests and that of the model match well.It shows that the FCRT model can describe naturally an important physical phenomenon that the sand samples of different inner grain sizes,which outer size are same,are of the different response properties,such as the strain of the sample with bigger inner grains is greater while other conditions are same.

关 键 词：有限特征比 本构模型 演化规律 参数 分析 

分 类 号：TU441.4[建筑科学—岩土工程]