作　　者： ; ; ;

机构地区： 东南大学交通学院

出　　处： 《岩土工程学报》 2005年第3期294-298,共5页

摘　　要： 根据堆石料大型三轴试验成果,提出了非线性强度包线在q—p 坐标面上的幂函数表达式。将此非线性强度准则模式应用于剪切屈服面与体积屈服面表达方程的推导,从而建立了一个可反映堆石料实际工程特性的新型弹塑性本构模型。应用自编计算程序将该模型与殷氏模型用于不同应力路径条件下堆石料试验的数值模拟研究,对比分析表明:本文模型计算结果与试验实测结果更为一致,能较好地描述各种加载路径下堆石料的强度与变形性状。 Based on the results of large-scale triaxial test of rockfills, an exponential formulation of the nonlinear strength envelope is presented. When the nonlinear strength criterion is introduced to determine the shear and volume yield surfaces, a new elasto-plastic constitutive model is herein developed for reproducing practical engineering behaviors of the rockfills. The numerical simulations for the various stress-path tests are performed in a developed program with the proposed model and Yin's model. It is shown that the proposed model can realistically describe the strength and deformation characteristics of rockfills subjected to some complex loading conditions.

关 键 词： 堆石料 大型三轴试验 非线性强度模式 双屈服面本构模型 数值模拟

领　　域： [建筑科学]