混凝土随机损伤力学研究进展

基于对混凝土构成性质的随机性与受力行为非线性的认识，对混凝土本构关系与结构非线性分析方法进行了系统的研究，形成了混凝土随机损伤力学的理论体系。研究发现：混凝土的非线性、随机性及二者的耦合对材料和结构的力学行为有深刻的影响；在细观-宏观以及本构-结构等不同尺度上，随机要素的传递、演化以及在演化过程中的涨落，均需要合理而细致地加以考虑；混凝土在细观层次的随机性直接影响结构的动力灾变行为。混凝土随机损伤力学的发展和完善，为实现基于可靠性的混凝土结构设计与控制提供了基础。

Recent developments on stochastic damage mechanics for concrete

Starting from the material randomness and nonlinear performance of concrete, the stochastic damage mechanics of concrete was systematically investigated. It is found that the mechanical behavior of concrete relies on the coupling between randomness and nonlinearity. And the fluctuation of randomness in different scales should be carefully considered to handle the failure of structures. Moreover, the randomness of concrete in the material level changes the nonlinear behaviors of structures subjected to disastrous excitations. The stochastic damage mechanics of concrete lays a solid foundation for the reliability based design and control of concrete structures.