摘要
利用大连理工大学的土工静力-动力液压三轴-扭转动多能剪切仪对相对密度为30%的钙质砂进行了扭转和竖向循环耦合试验,探讨了初始主应力方向角α0对钙质砂动强度和残余应变发展的影响。试验结果表明:α0对钙质砂的动强度、残余应变发展的影响非常明显,随着α0的增大,钙质砂的动强度显著减小,而残余应变的发展速度则明显加快。
In order to investigate the effect of the initial angle of principal stress α0 on dynamic strength and residual strain behaviors of calcareous sand under cyclic loading, a series of triaxial-and-torsional coupling cyclic shear tests on calcareous sand with a relative density of 30% were carried out in a new universal triaxial and torsional shear apparatus of Dalian University of Technology. The test results show that the effect is marked. With the increasing of α0, the dynamic strength of calcareous sand decreases obviously and the rising rate of residual strain increases.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2005年第5期723-727,共5页
Rock and Soil Mechanics
基金
国家自然科学基金资助项目(No.40272121)
科技部"十.五"南沙群岛及其邻近海区综合调查项目(No.7001DIA50041)资助。
