胶凝堆石料动本构关系及动模量衰减模型  

Dynamic Constitutive Relation and Dynamic Modulus Attenuation Model of CSG Materials

作　　者：蔡新[1,2] 宋小波[1] 明宇[2] 杨杰[2] 傅华[3] 

机构地区：[1]河海大学力学与材料学院,江苏南京210098 [2]河海大学水利水电学院,江苏南京210098 [3]南京水利科学研究院,江苏南京210029

出　　处：《水电能源科学》2013年第12期94-97,共4页Water Resources and Power

基　　金：国家自然科学基金资助项目(51179061);高等学校博士学科点专项科研基金资助项目(20100094110014);"十二五"国家科技支撑计划基金资助项目(2012BAD10B02)

摘　　要：基于动三轴试验,研究了不同围压、不同胶凝含量下胶凝堆石料的动本构关系及动模量衰减规律。结果表明,胶凝堆石料动本构关系仍可用Kondner R L双曲线模型进行描述,围压、胶凝含量对动本构关系均有影响,但围压对其影响较大;胶凝堆石料动模量随动应变的增大而非线性减小,且具有明显的应变软化特征,同等条件下动模量随围压和胶凝含量的增大而增大。根据动模量衰减曲线,提出了动模量衰减模型,通过线性回归分析,得到了胶凝堆石料动模量衰减模型参数表达式,为胶凝堆石坝的动力分析提供了参考。Based on the dynamic triaxial test, the dynamic constitutive relation and dynamic modulus attenuation rule with different cementitious content and different ambient pressure was studied. The results showed that the dynamic con- stitutive relationship of CSG materials was still available for Kondner R L hyperbola model~ the cementitious content and ambient pressure had impact on the dynamic constitutive relation; along with the increase of dynamic strain, the dynamic modulus nonlinear decreased, and it had obvious characteristics of strain softening under the same conditions, the dy- namic modulus increased with the increase of ambient pressure and cementitious content. According to the dynamic mod- ulus attenuation curve, the dynamic modulus attenuation model was proposed. Based on the linear regression analysis, the dynamic modulus attenuation model parameters of CSG materials was obtained, which provided reference for dynamic analysis of CSG materials.

关 键 词：动三轴试验 胶凝堆石料 本构关系 动模量 衰减模型 

分 类 号：TV21[水利工程—水文学及水资源]