• Sukamta Sukamta University of Diponegoro


The interaction of flexible structure and moving fluid, such as long span bridge subjected to wind loading, is a complex problem. Wind induced force can cause aeroelastic instability of long span bridge. Aeroelastic parameters  should  be  identifying  to  predict  the  response  of  long  span  bridge  to  wind  loading.  The
aeroelastic  parameter  properties  of  bridge  deck  section  are  disclosed  by  aerostatic  forces  and aerodynamic derivatives. The Reynolds number and a shape of the body are affecting the aeroelastic parameters. The components of aerostatic forces such as lift force, drag force and pitching moment are a result of integration of the pressure over body surface. The aerodynamic derivatives, also known as flutter derivatives are coefficients of the mathematical model of the aeroelastic forces. These coefficients are expressed in non dimensional form and used to determine the flutter analysis of flexible bridges. One ofthe coefficients is ∗ A2, that coefficient provides a very useful to judge and compare the aerodynamic stability. In order to determine the flutter derivatives, the wind tunnel tests using sectional model are very common. In the present work, free vibration is used to extract the flutter derivatives of Suramadu cable stayed bridge. The results obtained for the value of A 2∗ , indicating that the bridge was in stable condition at the value u/fb below 3,25. To improve the stability of the bridge deck should be modified on the shape of the bridge deck.

How to Cite
SUKAMTA, Sukamta. THE AERODYNAMIC DERIVATIVES OF SURAMADU CABLE STAYED BRIDGE. EACEF - International Conference of Civil Engineering, [S.l.], v. 1, p. 011, aug. 2011. Available at: <>. Date accessed: 19 may 2024.
Group of Structural and Construction Engineering