Stiffness and Damping of Clean Quartz Sand with Various Grain-Size Distribution Curves
Stiffness and Damping of Clean Quartz Sand with Various Grain-Size Distribution Curves
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DOI：
10.1061/(asce)gt.1943-5606.0000977
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发表时间：
2014-03
影响因子：
3.9
通讯作者：
T. Wichtmann;T. Triantafyllidis
中科院分区：
文献类型：
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作者：
T. Wichtmann;T. Triantafyllidis
摘要对26种石英砂进行了约240次共振柱（RC）试验，其粒度分布曲线为分段线性、间隙级配、S形和其他光滑形状。对于每种材料，在不同的压力和密度下测量小应变剪切模量Gmax、剪切模量退化曲线G（γ）/Gmax和阻尼比曲线D（γ）。作者在前两篇文章中提出的扩展经验公式，考虑了粒度分布曲线的均匀系数Cu= d 60/d10的影响，对各种试验材料进行了适用性检验。这些方程最初是根据线性级配的RC试验数据开发的。它表明，扩展的经验方程也适用于大多数更复杂的粒度分布曲线在目前的研究中测试。
AbstractApproximately 240 resonant column (RC) tests have been performed on 26 clean quartz sands with piecewise linear, gap-graded, S-shaped, and other smoothly shaped grain-size distribution curves. For each material, the small-strain shear modulus, Gmax, the shear modulus degradation curves, G(γ)/Gmax, and the damping ratio curves, D(γ), were measured at different pressures and densities. The applicability of the extended empirical equations proposed by the authors in two previous publications, considering the influence of the uniformity coefficient, Cu=d60/d10, of the grain-size distribution curve, has been inspected for the various tested materials. These equations were developed originally based on RC test data for linear gradations. It is demonstrated that the extended empirical equations work well also for most of the more complicated grain-size distribution curves tested in the current study.