悬索桥施工过程的颤振分析

悬索桥在施工阶段的结构刚度比成桥时要低很多,使得颤振稳定性成为控制桥梁设计与施工非常重要的因素。运用大跨度桥梁多模态颤振分析方法,对某大跨度悬索桥进行了各施工阶段的颤振分析,并探讨了施工阶段参数不同设置时悬索桥颤振临界风速的变化规律,据此以评价该桥施工阶段颤振稳定性。

Flutter Analysis of Suspension Bridges During Erection

During the construction period, the stiffness of suspension bridges is often less than that of the final state, which makes flutter stability becomes a very important factor in designing and constructing suspension bridges. Using the method of multi-mode flutter, the flutter stability of a large span suspension bridge during erection was analyzed. The variation regularity of the flutter critical wind speeds was discussed when parameters setting were different. Thus, the flutter stability of the bridge during erection can be evaluated.