Impact of Pavement Roughness and Deflection on Fuel Consumption Using Energy Dissipation
Publication: Journal of Engineering Mechanics
Volume 145, Issue 10
Abstract
The transportation sector contributes up to 27% of the total greenhouse gas (GHG) emissions in the United States; on-road transportation is responsible for 84% of the entire sector, implying that vehicles are a major cause of global warming. To understand the fuel energy dissipated through a vehicle’s suspension and tires, researchers have recently examined stochastic pavement models combined with mechanics-based vehicle models. These approaches assume the pavement is nondeformable with a certain random roughness level. In this paper, a pavement–vehicle interaction model is developed that can accommodate both road roughness and the deflection of rigid pavement. A quarter-car model is considered to represent the vehicle, a filtered white noise model is used to characterize the road roughness, and a two-elastic layered foundation (Euler–Bernoulli beam for the top pavement and Winkler foundation for the subgrade) is employed to simulate the rigid pavement. Subsequently, an augmented state-space representation is formulated for the entire pavement–vehicle system. The Lyapunov equation governing the covariance of the response is solved to obtain the energy dissipation of the vehicle’s suspension and tires. Finally, examples are presented and compared with the nondeformable pavement model to understand the impact of rigid pavement deformation on vehicle fuel energy dissipation.
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Acknowledgments
This study was partially funded by a grant (19DRMS-B146826-02) from the Development of Customized Contents Provision Technology for Realistic Disaster Management Based on Spatial Information program funded by the Ministry of the Interior and Safety of the Korean government and the Illinois State Toll Highway Authority (ISTHA). The authors are representatives of the Illinois Center for Transportation (ICT). The contents of this report reflect the views of the authors, who are solely responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official view of the Tollway or ICT. This paper does not constitute a standard, specification, or regulation.
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Published In
Journal of Engineering Mechanics
Volume 145 • Issue 10 • October 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Sep 25, 2018
Accepted: Feb 11, 2019
Published online: Aug 5, 2019
Published in print: Oct 1, 2019
Discussion open until: Jan 5, 2020
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