【摘要】 动剪切模量比和阻尼比是土体重要的动力特性参数,这两种参数取值的合理性对场地地震响应分析的结果有重要影响。为进一步完善黏性土的动剪切模量比和阻尼比随剪应变的变化关系的研究,给出了新的计算模型和推荐曲线。新曲线的计算模型基于Davidenkov模型和新的阻尼比计算模型,通过对搜集的大量黏性土数据进行非线性回归分析后得到。将分析结果与已有国内外学者的成果进行对比,验证了新计算模型具有较好的可靠性和工程实用性。更多还原

【Abstract】 Shear modulus and damping ratio are two important dynamic parameters of soil.Their rationality has great influence on the analysis results of seismic response.With the purpose of improving the relationship research of shear modulus ratio and damping ratio to shear strain for cohesive soil,a new model was proposed,which was based on Davidenkov model and a new model of damping ratio was obtained by nonlinear regression analysis of a mass of data.By comparing the results from the new model with those from domestic and overseas scholars,it is proved that the new model is of high reliability and qualified for engineering application.更多还原