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首页> 外文期刊>International journal of geotechnical engineering >A correction to damping ratio for hyperbolic-hysteretic model for clayey soil
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A correction to damping ratio for hyperbolic-hysteretic model for clayey soil

机译：黏性土双曲滞回模型阻尼比的修正

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摘要

For clayey soils, the shear modulus and damping ratio are perhaps the two most common parameters considered in dynamic soil behavior characterization. It is well known that under cyclic loading, soil behaves hysteretically in the stress-strain plane. Several mathematical models were proposed to simulate the soil behavior under the cyclic loading conditions. For most of such models, Masing rule is often used to define the unloading-reloading behavior of stress-strain loops. However, it was also noted by many researchers that the framework of Masing rule tends to overpredict the damping ratio at moderate to high strain range. The present paper deals with a hyperbolic-hysteretic undrained soil model based on Masing rule. First, the efficacy of the model to predict the variation of shear modulus and damping ratio for a wide strain range was examined. Second, a simple correction for the calculation of damping ratio was introduced. Finally, the corrected damping ratios for various types of soils with varying plasticity index were compared with published experimental results. Good agreement was obtained between the computed and experimental results for a wide range of strains and plasticity index.
机译：对于黏土，剪切模量和阻尼比也许是动态土壤特性表征中考虑的两个最常见的参数。众所周知，在循环荷载作用下，土壤在应力应变平面上表现出滞后性。提出了几种数学模型来模拟循环荷载条件下的土壤行为。对于大多数此类模型，Masing规则通常用于定义应力-应变环的卸载-再加载行为。但是，许多研究人员还指出，Masing规则的框架倾向于高估中高应变范围的阻尼比。本文研究了基于Masing法则的双曲滞回不排水土模型。首先，检验了该模型在较大应变范围内预测剪切模量和阻尼比变化的功效。其次，对阻尼比的计算进行了简单的校正。最后，将具有不同可塑性指数的各种类型土壤的校正阻尼比与已发表的实验结果进行了比较。计算结果和实验结果在各种应变和可塑性指数之间均取得了良好的一致性。

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