【摘要】 参考剪应变是土体动模量衰减曲线的归一化参数,它的确定关系到试验成果有效整理与土工建筑物地震动力分析的可靠性。传统采用定义求解参考剪应变的方法因为涉及动强度而不够简便。论文提出了另外两种求取参考剪应变的方法,即最大动剪模量折半的方法一和联立求解方程组的方法三,均不涉及动强度问题。其中方法一还具有概念清楚、求解简便等特点。三种方法计算得到的参考剪应变均能较好地归一动剪模量比衰减曲线,但阻尼比曲线的归一效果稍差。更多还原

【Abstract】 Reference shear strain is a generalized parameter of the curve of dynamic shear modulus ratio versus dynamic shear strain of soil,and traditionally it has been calculated by the definition as the ratio of maximum dynamic shear stress over maximum dynamic shear modulus.This paper proposes two new methods that use normalized dynamic shear modulus ratio curve and solution of linear equations respectively,not involving dynamic strength of the soil.Comparison shows that all the three methods produce similar modulus-strain curves,but the first new method has advantages of clearer conceptualization and simpler calculation.更多还原