A Review of Aerodynamic Admittance Functions of Bridge Structures

Buffeting responses of structures are excited by buffeting forces, which are determined by the aerodynamic admittance function (AAF) of structures and power spectrumdensity of turbulence., the Sear’ s function, which is based on the strip assumption, fails to accountforthe coherence ofthe turbulence along the span. It is shown by the analysis that 3-dimensional AAF (3DAAF) is affected by the dimensions of the structure, the characteristic of the turbulent field and the reduced frequencies. The taut-strip test also shows that 3DAFF accords betterwith the facts met in civil engineering.