Effect of Vehicle Velocity on the Dynamic Amplification of a Vehicle Crossing a Simply Supported Bridge |
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Authors: | Sean P Brady Eugene J O'Brien Ale? ?nidari? |
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Affiliation: | 1Texcel Pty Ltd, South Brisbane, Queensland, Australia; formerly, Dept. of Civil Engineering, Univ. College Dublin, Dublin 2, Ireland. 2Professor, Dept. of Civil Engineering, Univ. College Dublin, Dublin 2, Ireland (corresponding author). E-mail: eugene.obrien@ucd.ie 3Slovenian National Building and Civil Engineering Institute, Slovenia.
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Abstract: | Many writers, using both experimental tests and complex numerical models, have examined the effect of vehicle velocity on a highway bridge’s dynamic amplification. Although these tests and models give valuable quantitative information on dynamic amplification, they give little insight into how amplification is affected by individual vehicle/bridge parameters. This paper uses relatively simple numerical models to investigate the effect of vehicle velocity on a bridge’s dynamic amplification. A single vehicle crossing a simply supported bridge is modeled as a constant point force. A set of critical velocities are determined associated with peaks of dynamic amplification for all beams. The reasons for these large amplifications are discussed. A more complex finite element model, validated with field tests, is used to test the applicability of the conclusions obtained from the simple models to a realistic bridge/vehicle system. |
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Keywords: | Dynamic analysis Velocity Trucks Amplification Bridges highway Numerical models |
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