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The safety as well as serviceability of over-sea bridges can be threatened by excessive vibration, because the bridge should endure harsh condition such as high-speed wind during the expected life time. The buffeting, which is typical wind induced vibration, is hard to be estimated without verifying the exact wind properties. This study investigates a method for improving an accuracy of the buffeting analysis of a cable stayed bridge by considering in-site turbulence property. The two-year, 100 Hz, wind and acceleration data measured by integrated measurement system is used to analyze the properties of the wind and the structure more accurately. The buffeting analysis considering an effect of in-site wind turbulence is performed by using measurement-based model. The method calculating limit speed of serviceability is considered to be reliable, because the result from the analysis has enough similarity with the measured one. It is expected that the serviceability evaluation criteria of each bridge can be more reasonably determined considering wind properties, if enough data is stored on the system.

Wind Stability Analysis of an Over-Sea Cable Stayed Bridge Considering In-site Turbulence Properties