Full-scale measurement of Akashi-Kaikyo Bridge during typhoon

摘要

Full-scle measurement data observed on the Akashi-Kaikyo Bridge during strong typhoons were analyzed. Power spectral density and spatial correlation of longitudinal velocity fluctuations were analyzed. PSD was well represented by Hino's formula by changing the scaling parameter. Spatial correlation at two points was well represented not by the exponential formula but by an alternative coherence function based on isotropic turbulence theory. Decay factor in the exponential formula showed a weakly increasing trend with the increase in distance and wind speed. Bridge response of deck lateral deflection was also analyzed. Static deflection at winds with normal to the bridge axis was in good agreement with the analytical value. Gust factors of deck lateral deflection were mostly less than design specification.