热力学方法在土体动力Ramberg—Osgood模型中的应用研究

从Ramberg—Osgood模型的骨架曲线和滞回曲线出发，假定塑性中心的移动为直线，构造土体动力耗散函数，从热力学基本定律出发研究了土体动力耗散特性及动力变形机理．提出了反映筑坝堆石料动力特性的第1阌值应变和第2阈值应变，两个阈值应变主要受最大动剪切模量系数、指数及无黏性土的内摩擦角的影响．第1和第2阈值应变间屈服面...

Study of Application of Thermodynamic Methods to Dynamic Ramberg-Osgood of Soils

Starting from the skeleton curves and hysteresis loop of Ramberg-Osgood model,dynamic dissipation function is constructed,based on the assumption that the movement of plastic center follows a straight line.The yield surface and energy dissipation mechanisms of dam materials at different dynamic strain amplitudes are discussed.Two types of cyclic threshold shear strain,i.e.,the first threshold shear strain and the second threshold shear strain,are proposed to describe the dynamic characteristics of rockfill ...