ABSTRACT
This chapter introduces the principles and analysis of dynamic response to wind. The effective load distribution due to the resonant part of the loading is given to a good approximation by the distribution of inertial forces along the structure. In some important papers in the 1960s, Davenport outlined an approach to the wind-induced vibration of structures based on random vibration theory. The main advantage of the effective static load distribution approach is that the distributions can be applied to static structural analysis computer programs for use in detail structural design. For very flexible, dynamically wind-sensitive structures, the motion of the structure may itself generate aerodynamic forces. Galloping is a form of single-degree-of-freedom aerodynamic instability, which can occur for long bodies with certain cross sections. An example of combined equivalent static load distributions, when more than one resonant mode contributes significantly, is discussed in this chapter.
