ABSTRACT
When a structure is immersed in an air stream, aerodynamic forces are induced in the structures by the
air stream and the aerodynamic forces apply on the structure as wind load generating deflection and
vibration. Flexible structures like high-rise buildings and long-span bridges are susceptible to deflection
and vibration under wind action. In order to reduce the deflection or to control the vibration of
the structure, the effect of aerodynamic/aeroelastic forces should be reduced. The best method for the
reduction of the aerodynamic force effect is to adapt a structural configuration that can reduce the
aerodynamic/aeroelastic force effect. For this purpose, when designing a flexible structure susceptible to
vibration under wind action, it is necessary and useful for structural engineers to understand the
mechanism of the process generating aerodynamic forces and the relationship between structural
configuration and aerodynamic forces.
