Simple Shear Behavior of Calcareous and Quartz Sands
Simple Shear Behavior of Calcareous and Quartz Sands
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DOI：
10.1007/s10706-010-9357-x
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发表时间：
2011
影响因子：
1.7
通讯作者：
H. Brandes
中科院分区：
文献类型：
--
作者：
H. Brandes
研究了几种松散骨架钙质砂的单调和循环简单剪切行为，并将其与常见的内华达和渥太华石英砂进行比较，以便在这些类型的材料之间进行对比，并开发用于准非线性地面响应分析的刚度和模量退化曲线。在 0.05% 至 1% 的应变水平下，钙质砂的移动摩擦阻力和循环强度通常较高，而石英砂的剪切模量和阻尼较大。降解特性似乎对初始循环应力比不太敏感。钙质砂和石英砂之间的行为差异可能是由于颗粒几何形状、硬度、级配和颗粒内空隙量的差异造成的。
The monotonic and cyclic simple shear behavior of several loose skeletal calcareous sands is investigated and compared to that of common Nevada and Ottawa quartz sands in order to draw contrasts between these types of materials and to develop stiffness and modulus degradation curves for quasi-nonlinear ground response analysis. Mobilized frictional resistance and cyclic strength are generally higher for the calcareous sands, whereas shear modulus and damping are larger for quartz sand at strain levels between 0.05 and 1%. Degradation properties do not appear to be very sensitive to the initial cyclic stress ratio. Differences in behavior between the calcareous and quartz sands are presumably due to contrasts in grain geometry, hardness, gradation and the amount of intraparticle voids.