ABSTRACT

Aerodynamic performance of long span bridges is accentuated by the trends to span still wider straits and busy shipping lanes, safely and economically. The present paper outlines the salient aerodynamic features in present and future bridge design. The theoretical and experimental tools available to the designer are addressed. Research and development needs are identified in order to meet the aerodynamic challenges where costs, construction and maintenance will introduce new structural materials with improved strength/weight ratios. Such very light structures will be aerodynamically sensitive if special precautions are not taken. A computer controlled active stabilization system is outlined inspired by active control surface systems in advanced aircraft.