大跨度桥梁全耦合颤抖风振响应分析

本文基于Ｓｃａｎｌａｎ的颤抖风振分析理论，建立了桥梁断面质心与形心不重合时大跨度桥梁横弯、竖弯、扭转全耦合的颤抖风振基本方法，采用复合高斯－拉盖尔方法进行数值积分求得响应值，并以金门大桥为算例，探讨了横向风振响应值的大小及偏心距对响应的影响，得出了一些有益的结论和建议．

Fully coupled analysis of flutter and buffeting for large span bridge

The fundamental dynamic equations in respect of the general case,in which the mass center and form center are not coincided and the horizonal,vertical,torsional vibration are coupled each other,are established based upon Scanlan's flutter and buffeting theory. The method of composite Gauss-Laguerre is adopted to solve the numerical integration.Taking Golden Gate Bridge as an example,it discusses not only the rate of horizontal vibration in the whole response,but also the influence of eccentric distance to the dynamic response.Finally,some valuable conclusions and suggestions are given.