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http://dx.doi.org/10.7734/COSEIK.2022.35.1.23

Identification of System Frequency Variations in Vehicle-Bridge Interaction Systems  

Lee, Jaehun (Deprartment of Civil & Environmental Engineering, Hanynag University)
Lee, Young Jae (Deprartment of Civil & Environmental Engineering, Hanynag University)
Kim, Robin Eunju (Deprartment of Civil & Environmental Engineering, Hanynag University)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.35, no.1, 2022 , pp. 23-28 More about this Journal
Abstract
Natural frequency variations in a vehicle-bridge interaction system is examined. The interaction system is designed for a simple beam subject to a moving vehicle. The equation of motion for the system is derived under the quarter-car condition, and numerical simulation is performed. Frequency amplification ratio (FAR) is defined as a ratio between the initial and the varying natural frequency of the system; a discontinuity in the FAR implies a resonance condition. Analysis is mainly focused on patterns, frequency variation characteristics, and discontinuity points of the FAR under the vehicle mass and tire stiffness variations. The result reveals that the interactions between the system affects the natural frequency of both the vehicle and the bridge in similar frequency regions that can be visually identified at the middle of the span using the FAR.
Keywords
FAR; simple beam; moving vehicle; vehicle-bridge interaction; natural frequency;
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