Measurement of Quasi-Elastic Stiffness Parameters of Dense Toyoura Sand in Hollow Cylinder Apparatus and Triaxial Apparatus with Bender Elements
Measurement of Quasi-Elastic Stiffness Parameters of Dense Toyoura Sand in Hollow Cylinder Apparatus and Triaxial Apparatus with Bender Elements
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DOI：
10.1520/gtj11267j
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发表时间：
2004
影响因子：
1.6
通讯作者：
S. Chaudhary;J. Kuwano;Y. Hayano
中科院分区：
文献类型：
--
作者：
S. Chaudhary;J. Kuwano;Y. Hayano
在中空圆柱仪和装有局部变形传感器和弯曲元件的三轴仪上进行了相似固结和p‘恒剪试验，在不同应力状态下测量了密实Toyoua砂土的准弹性刚度参数。对这两种测试装置的测试结果进行了比较。尽管三轴仪测得的杨氏模数略低于中空圆柱仪测得的杨氏模数，但它们与有效法向应力符合大致相同的幂函数。中空圆柱仪测得的剪切模数GVH与三轴测定仪测得的剪切波速基本一致。两种测试设置的泊松比也是相似的。垂直杨氏模数小于水平杨氏模数。杨氏模数的各向异性与有效应力比呈幂函数关系。然而，泊松比不依赖于平均有效压力或剪应力水平。还考察了刚度矩阵的对称性。
Quasi-elastic stiffness parameters of dense Toyoura sand were measured at various stress states during similar consolidation and p′-constant shear tests in a hollow cylinder apparatus and a triaxial apparatus equipped with local deformation transducers and bender elements. Test results from these two test setups were compared. Although the Young's moduli from the triaxial apparatus were slightly lower than those from the hollow cylinder apparatus, they followed approximately the same power laws with the effective normal stresses. The shear modulus Gvh from the hollow cylinder apparatus was almost the same as that from the shear wave velocity measurement in the triaxial apparatus. The Poisson's ratios were also similar from both test setups. The vertical Young's modulus was found to be smaller than the horizontal Young's modulus. The anisotropy in Young's moduli followed a power law with the effective stress ratio. However, the Poisson's ratios were not dependent on the mean effective pressure or the shear stress level. The symmetry of the stiffness matrix was also examined.