In structures with large dimensions, wind action may cause important dynamic effects, rendering inadequate the static approaches. In large structures, the simple application of gust factors tends to oversimplify the problem and it becomes necessary to use spectral methods, which describe better the random nature of the wind.
Principia has applied this type of analysis to various kinds of bridges. The example shown here is a reinforced concrete viaduct, with large spans and very tall piers, that we studied during the phases of both construction and operation.
