拱的静动力稳定性研究进展

Research progress on static and dynamic stability of arches

拱是一种以受压为主的结构体系,当其所承受的荷载达到某个临界值时,整个结构随即失去平衡,通常可表现为面内或面外失稳.拱的失稳具有类似于脆性断裂的特征,往往无明显征兆、突然发生,且一旦失去稳定,即会造成灾难性的破坏,危及生命财产安全.因此,从深层次探究拱的稳定性,分析拱的失稳机理显得尤为重要.文章分别从拱的静、动力稳定性角度系统地回顾了单拱、拱桥的面内外稳定性研究进展,综述拱静动力稳定理论与实验研究概况,指出目前关于拱的稳定性分析和研究方法存在的不足,展望拱的稳定性研究发展趋势,为今后拱的稳定性研究提供指导性建议.

Arches are structures mainly subjected out-of-plane owing to the load reaching its critical to compressive loads which will be out of balance in-plane or value. The instability of arches always occurs suddenly with- out any omen, which is similar to brittle fracture. There will be disastrous consequences once these structures lose stability, which will endanger the life and property safety. Hence, it is particularly important to explore the stability of the arch from a deeper perspective. In this paper, the research progress of inplane and out-of-plane static and dynamic stability of single arch and arch bridges are systematically reviewed, the theoretical and experimental research on static and dynamic stability of single arch and arch bridge are summed up, the limitation of arch stability analytical methods are summarized, the development trend of research on stability of arch is forwarded, and the guidance for the future arch research is given.