The dynamic shear modulus ratio and damping ratio of soil are indispensability for seismic safety evaluation and soil layer seismic response analysis of engineering sites.

土的动剪切模量比和阻尼比是工程场地地震安全性评价工作和土层地震反应分析中不可缺少的重要参数。

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The effect of dynamic shear modulus ratio and damping ratio of soil on the earthquake responses of soil layers is presented in the paper by some examples, especially for the strong earthquake.

本文通过关便指出了不同的土动力特性经验关系对土层地震反应的分析结果将产生不同的影响，特别是对大震作用下的土层反应。

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Dynamic triaxial test is mainly used to determine the dynamic shear modulus & dynamic damping ratio of soil, which are the important parameters for seismic response analysis.

动三轴试验主要确定土的动剪切模量和土的动阻尼比，而这些参数又是地震动反应分析中的重要参数，该参数的取值小直接影响了桥梁的勘察设计。

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