【摘要】 冻融循环将直接导致混凝土内部结构损伤,使混凝土材料的结构松散,力学性能退化.这种性能退化所反映的混凝土本构行为的变化特性,既是工程中关于混凝土耐久性寿命评价、在役结构稳定性判断的重要参数,也是本构理论研究中的空白.基于这种指导思想,从冻融过程中的宏、细观试验建立混凝土力学性能退化规律的基本认识,屈服破坏面改变与本构模型参数的变化规律,得到关于冻融损伤发展的有益结论.更多还原

【Abstract】 The freez-thraw cycle will directly lead to damage of inherence structure of concrete.The result of structure damage is structure loose of concrete and degradation of mechanical property.The characteristic of constitutive behavior variation,which is the reflection of performance degradation,not only is important parameter of durability evaluation of concrete and stability appreciation of concrete structure but is undetermined in the constitutive theory.So in the light of the guiding idea,the basic knowledge about degradation law of concrete mechanical property,the changing rule of the parameters of constitutive model and the modification of yield failure plane are established with the macro-and-micro test.Some valuable conclusions for the development of freez-thraw damage are obtained.更多还原