基于桥梁抖振分析的自激力计算方法

Self-excited force calculating method based on bridge buffeting analysis

抖振是桥梁在风荷载作用下的一种经常性的限幅振动。对于长大跨度桥梁在计算其抖振响应时不得不考虑自激力的影响 ,而自激力的计算方法不一 ,且其计算过程复杂、繁琐。本文根据抖振计算理论 ,研究一种自激力的实用计算方法 ,并对军山斜拉桥进行自激力计算。

Buffeting is the usual random vibration with the amplitude limited under natural wind. Self-excited force must be considered when calculating response of long-span bridge buffeting. The authors worked out a practical calculating method of self-excited force according to buffeting calculating theory and calculated self-excited force of Junshan cable-stayed bridge.