竖扭耦合的大跨度桥梁颤抖风振响应分析

Flutter and Buffeting Analysis for long-span Bridge in Respect of the Case That the Vertical and Torsional Vibrations Are Coupled Each Other

以 Scanlan的颤抖振分析理论为基础 ,推导了桥梁截面偏心时大跨度桥梁竖弯、扭转相互耦合的颤抖风振基本方程及响应均方值表达式 ,以金门大桥为算例 ,证明了求解方法的正确性 .

Based upon Scanlan's flutter and buffeting theory, this paper establishes the fundamental dynamic equations under wind in respect of the case that the mass center and form center are not coincided and the vertical and torsional vibrations are coupled each other. It also obtains the formula of the response of displacement, velocity and acceleration. Taking the Golden Gate Bridge as an example, we find that the method is correct.