【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。更多还原

【Abstract】 In order to investigate the effect of the initial angle of principal stress 0α 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 0α , the dynamic strength of calcareous sand decreases obviously and the rising rate of residual strain increases.更多还原