多因素协同作用下混凝土坝性能退化机理研究进展

Research progress of performance degradation for in-service concrete dam under multi-factor synergism

针对混凝土坝服役期间长期受到荷载与环境多因素的协同作用,导致其筑坝材料出现不同程度的老化、结构性能退化等问题,对多因素协同作用下混凝土坝性能退化问题的研究进行归纳总结。由于环境与荷载等因素是通过驱动材料性能演化来影响大坝服役性能的,故主要从荷载效应和结构抗力角度综述了混凝土坝系统性能退化机理,着重阐述了多因素作用下大坝结构与材料退化研究的现状和不足,并指出混凝土坝结构服役性能机理研究亟待解决的几个科学问题。

Under the effect of load and environmental factors, concrete dam materials appear different degrees of aging and the performance of dam structures degrades during the service period. With regard to this problem, studies on performance degradation mechanism under the coupling effect of multiple factors were summarized in this paper. Since the performance of the in-service dam affected by the environment and load factors is mainly driven by the evolution of material properties, the performance degradation of concrete dam system was studied from the aspect of load and structural resistance, with emphasis on research status and technical challenges of the degradation mechanism of dam structures and materials under multiple factors synergy. Finally, some key scientific problems needed to be urgently solved on the performance of in-service concrete dams are pointed out.