Study on the mechanism and evolution law of structural damage in concrete gravity dams
The research on the mechanism and evolution law of structural damage in the concrete gravi-ty dam,as the main dam type in water conservancy engineering,is of great significance to ensure the dam safety and stability. Aiming at the problems such as temperature stress damage,shrinkage and creep damage and fatigue damage that the concrete gravity dam may face under load,the structural dam-age mechanism of the concrete gravity dam is deeply studied by theoretical analysis,experimental re-search and numerical simulation. Based on the damage mechanics theory,the damage state variables are defined,the constitutive model of anisotropic elastic damaged materials is put forward,the micro-dam-age mechanism and performance characteristics of concrete materials are analyzed,and the stress-strain changing rules of the concrete gravity dam at different damage stages are revealed.
concrete gravity damdamage mechanismevolution lawdamage variableconstitutive model
万方数据
维普
