大跨径悬索桥颤振稳定性的参数研究

颤振稳定性已成为影响和控制大跨径悬索桥设计的一个重要问题。运用大跨径桥梁三维非线性颤振分析方法，以润扬长江大桥为背景，对一些设计参数，如桥跨布置、矢跨比、边主跨比、加劲梁的高度和恒载集度等，进行了颤振的参数分析，并指出了影响大跨径悬索桥颤振稳定性的主要设计参数。

Parametric Study on Flutter Stability of Long Span Suspension Bridges

Flutter stability is one of major factors governing the design of long span suspension bridges. Using the method of three-dimensional nonlinear flutter analysis, numerical flutter analyses for the Runyang Bridge over the Yangtze River are carried out including the arrangement of bridge spans, the cable sag to main span ratio, and the side span to main span ratio, and the height and dead load of the stiffening girder. Main design parameters that affect the flutter stability of long span suspension bridges are point out.