混凝土材料损伤协同演化及其热弹性不稳定性

从一种全新的角度出发,将混凝土受载破坏看成混凝土材料本身各组成部分在外界作用下的自组织行为.首先,论证了混凝土损伤演化的自组织特征;其次考虑热力学参量(温度、自由能和熵等)在混凝土损伤演化中的作用,并综合力学参量和热学参量,构造系统的动力学方程;最后从协同学观点出发,将混凝土材料的破坏过程视为非平衡相变现象,利用协同学的方法进行研究,通过线性稳定性分析,探讨从这一角度寻求混凝土材料的弹性极限的方法.通过研究得出的结论,为改善混凝土的力学性能和研制高性能混凝土材料提供理论依据.从协同学这一全新的角度对混凝土材料的损伤演化过程进行分析,具有一定的理论价值和工程实践意义.

Synergetics Effect and Thermo Elastic Instabilities of Evolution of Concrete Damage

Destroy of concrete under loads was thought as a result of outside force in traditional views,while the author looked on it as a self-organization of components of concrete.This paper demonstrates the self-organized characteristic of the evolvement of concrete damage,then constructs the dynamic equations ofthe system think of the action of thermodynamic parameter such as temperature,freedom energy and entropy etc.in the evolvement of concrete damage,at last,looks on the damage course of concrete as imbalance changes in the view of synergetics,discusses the method of finding out the elastic terminal of concrete through analysis of stability,offers academic gist for improving concrete mechanic performance and the study of high performance concrete and have certain academic value and practice meaning.