Flügge’s Conjecture: Dissipation- versus Deflection-Induced Pavement–Vehicle Interactions
Publication: Journal of Engineering Mechanics
Volume 140, Issue 8
Abstract
The dissipation occurring below a moving tire in steady-state conditions in contact with a viscoelastic pavement is expressed using two different reference frames: a fixed observer attached to the pavement and a moving observer attached to the pavement–tire contact surface. The first approach is commonly referred to as dissipation-induced pavement–vehicle interaction (PVI), the second as deflection-induced PVI. Based on the principle of frame independence, it is shown that both approaches are strictly equal, from a thermodynamic point of view, and thus predict the same amount of dissipated energy. This equivalence is illustrated through application to two pavement systems: a viscoelastic beam and a viscoelastic plate both resting on an elastic foundation. The amount of dissipated energy in the pavement structure needs to be supplied by the vehicle to maintain constant speed, thus contributing to the rolling resistance, associated excess fuel consumption, and greenhouse gas emissions. The model here proposed can be used to quantify the dissipated energy and contribute to the development of engineering methods for the sustainable design of pavements.
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Acknowledgments
This research was carried out by the Concrete Sustainability Hub at Massachusetts Institute of Technology (CSHub@MIT) with sponsorship provided by the Portland Cement Association (PCA) and the Ready Mixed Concrete (RMC) Research and Education Foundation. The CSHub@MIT is solely responsible for the content.
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Published In
Journal of Engineering Mechanics
Volume 140 • Issue 8 • August 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Jul 6, 2013
Accepted: Nov 23, 2013
Published online: Nov 26, 2013
Discussion open until: Jul 7, 2014
Published in print: Aug 1, 2014
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