循环应变下饱和砂(粉)土衰化动力特性研究

Degradation behavior of saturated sand and sandy loam under cyclic strain

通过循环应变动三轴试验，研究了饱和砂（粉）土衰化动力特性．首先阐明固结压力对循环累积孔压比的影响，进而建立了循环应变下的累积孔压比归一化关系；为了揭示衰化动变形参数的变化与非衰化动变形参数变化之间的联系，提出了测定衰化动变形参数变化关系的试验与数据处理方法，最后建立了衰化动变形参数的归一化关系．

Cyclic degradation behavior of saturated sand and sandy loam is studied by using cyclic strain controlled triaxial testing device.The effect of the consolidation pressure on the cyclic accumulative pore water pressure ratio is first clarified.The normalized relation of the ratio under cyclic strain is further established.In order to reveal the relationship between cyclic degradation deformation and non degradation deformation parameters,experimental and analytic methods are developed.Finally,the normalized relationship among degradation deformation parameters is given.