Comparison study on experimental strong wind characteristics of Runyang Suspension Bridge

When typhoon Matsa and Khanun passed through Jiangsu during August and September in 2005,they were wholly recorded by the wind and structural healthy monitoring system(WASHMS) of Runyang Suspension Bridge(RSB).The measurement data were analyzed to obtain the mean wind velocity and direction,the turbulence intensity,the integral length of turbulence and power spectrum,etc.Analysis results show that the turbulence intensity of typhoon Khanun is larger than that of typhoon Matsa,and both of them are larger than the suggestion value of bridge design code;both of the two turbulence power spectrums can not fit the Kaimal spectrum very well,they are a little smaller in low frequency domain and a little larger in high frequency domain.Finally,the method of nonlinear least-squares fitting technique was used to obtain the fitting spectrum based on the measurement data of turbulence wind speed.Results obtained in this paper can provide reference values for wind resistant study of RSB.