Abstract
As far as the aerodynamic behavior of recent super long span bridge concerns, three dimensional motions, including the lateral motion of the deck, are very important to describe the flutter occurrence. To make detailed discussion on it, 3 dimensional precise aerodynamic farce information is also very important. In the measurement of unsteady aerodynamic farce there have been applied the free vibration method and the forced vibration method. However they can be hardly extended to the measurement of more complex motion. In this paper newly developed flexible method in extension to multiple dimensional measurement was introduced and its effectiveness was examined by a wind tunnel test.
