Abstract
A gust response analysis is vital for the design of long-span-suspended bridges. To obtain the precise results, new methods have been developed for the evaluation of aerodynamic admittances. This paper shows two methods using direct and indirect measurements. The former is to evaluate the ratio of wind fluctuations and the wind induced forces of a static rigid section model in a wind tunnel. The flow is turbulent and is made by a active gust generator. The latter is to evaluate flutter derivatives which have close relationship with aerodynamic admittance.Their algorisms are introduced and their results were confirmed by the experiments by the deck section of Kurushima 2nd Bridge.
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