Identification of flutter derivatives applying forced vibration method in bridge wind-resistant safety assessment

The identification of flutter derivatives for bridge sectional model has long been a key issue in long-span bridge wind-resistant safety assessment. Based on the present methods used in obtaining the unsteady aerodynamic forces and flutter derivatives, as the first successful. experiment which has been conducted in China to test the unsteady aerodynamic forces in wind tunnel, the feasibility of the method is proved through numerous tests and abundant practice. Based on an identification device of forced vibration method for 2-DOF flutter derivatives of bridges sectional model, the researcher, cooperated with some others from the National University of Defense Technology and Tongji University, has developed a set of identification device for a 3-DOF flutter derivatives of bridges sectional model, and further research is being conducted.