弧形钢闸门主框架的动力稳定分析

分析国内外某些低水头弧形钢闸门的失事破坏情况,指出在振动荷载作用下弧形钢闸门的支臂丧失稳定性是引起大多数闸门破坏的主要原因,据此利用B-R准则对弧形钢闸门主框架的动力稳定性进行研究,得出了几种简单荷载作用下主框架的动力稳定承载力,由此可知外荷载的类型及频率对结构的动力稳定承栽力有显著影响。此研究思路和方法可为弧形钢闸门动力稳定性的深入研究和工程应用提供参考。

Dynamic stability analysis of main frame of radial steel gates

From an analysis of failure conditions of some low head radial steel gates at home and aboard, it is found that the instability of the bracing arm of the radial steel gate under vibrating loads is the main cause for their failures in most cases. The dynamic stability of the main frame of radial steel gates was studied by use of the B-R criterion, and the carrying capacities for dynamic stability of the main frame under different simple loads were obtained. It is concluded that the types and frequencies of dynamic loads have significant effects on the critical loads of dynamic stability of the structures. The thought and method of the study provide some references for further research on dynamic stability of radial steel gates.