Vibration of Simple-Span Highway Bridges

An analytical method is developed for predicting the magnitude and character of highway-bridge vibration due to the passage of heavy vehicles. The accuracy of the method of analysis and the validity of the assumptions presented are investigated by comparison with laboratory tests on model bridges. Tests of actual structures are used to prove the applicability of the method to field conditions and to indicate those conditions that should be assumed for design. Theoretical results obtained by both analog computers and digital computers show the effects of the various parameters. Finally, the problem is reduced to its simplest form, and charts are provided to predict maximum dynamic deflections. Only simple-span girder bridges and stringer bridges loaded by single two-axle vehicles are studied.