Analysis Of Wind Resistant Of Long Span Bridges Under Construction

In this paper,wind resistant of long span bridges in cantilever state is analysed,also,the usable formula of wind loading,inconstruction is given.In this paper the author first analysed the wind effects on bridges,and wind-induced vibration is described in particular.Second,two methods for wind effects on bridges are discussed,which include the method of gust response factors and the method of buffeting response spectrum.Thirdly,from the requirement of practical engineering,the accurate analysis method is simplified according through the parametric analysis,the formula for engineering application of the second method is presented .Finally,a realengineering example illustrate the usage of the two methods.And the result of the engineering example show that the stress calculatedby buffeting response spectrum method is larger than which calculated from the gust response factor methed,also the temporary method of wind resistant ways for bridge in cantilever state is presented.