土的动剪切模量比和阻尼比的经验模型研究

A Study on Empirical Models of Dynamic Shear Modulus Ratio and Damping Ratio of Soil

收集了大量近年来国内外公开发表的关于动剪切模量比和阻尼比的文章,提取了文中关于动剪切模量比和阻尼比随剪应变变化的试验数据,选择了统一的经验模型对粘土、淤泥质土、砂土及岩石的试验数据进行回归分析,得到了针对不同土及岩石的回归方程。将拟合结果同国内外学者给出的实测值平均曲线进行对比,验证了所选择经验模型和拟合曲线的可靠性。本文所选用的试验数据包含了新近发表文章中的试验数据,因此,本文的拟合结果可为岩土及地下工程的抗震分析提供更有意义的帮助。

By collecting a lot of data from published papers about dynamic shear modulus ratio and damping rati- o, a database of experimental data was established. Then, regression analysis on experimental data of clay, silt soil, sand and rock were carried out by applying a unified empirical model. Based on the analysis results, the fitting pa- rameters of empirical model were obtained. Evaluating these results with the average curves of the measured data giv- en by different scholars, the comparison verifies the rationality of the selected model and fitting curves. Because the database has contained measured data from the recently published papers, it is believed that the fitting results would provide a more useful guide for engineering application in geoteehnical and underground projects.