Vertical Pavement Strain as Means of Weighing Vehicles
Publication: Journal of Transportation Engineering
Volume 120, Issue 4
Abstract
The concept of estimating vehicle loads by weigh‐in‐motion systems that monitor deflections in strain‐gaged bridges and culverts is well established. In this project, the possibility of estimating loads by monitoring subgrade deflections in flexible pavements was investigated. A line of vertical strain transducers was installed at a depth of 500 mm in a dense sand subgrade across one wheel path of the outside lane of a busy highway (this research was conducted in Australia, where the outside lane is on the left). The installation was calibrated with a truck of known weight, enabling the weights of other vehicles to be calculated and compared with weights determined by other means. Four test runs were conducted at six month intervals. Repeatability, sources of error, and accuracy of weight prediction are discussed. Successful results were obtained with the system, but further work would be required before it could be used as an operational system.
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References
1.
Brown, J. I., and Peters, R. J. (1988), “Development and performance of CULWAY: a culvert based weigh‐in‐motion system.” Proc., Australian Road Res. Board Conf., Vol. 14(Part 6), Australian Roads Research Board, Vermont South, Victoria Australia.
2.
Marsh, J. G. (1986). “PAVWEIGH—feasibility study.” Rep., School of Civil Engineering, University of Western Australia, Nedlands, Australia.
3.
Marsh, J. G. (1992). “Possibility of weighing vehicles in motion by vertical pavement strains.” Rep. Geo 92116, Department of Civil and Environmental Engineering, University of Western Australia, Nedlands, Australia.
4.
Sharp, K. G., Hannay, R. A. K., and Potter, D. W. (1988). “A device to measure transverse position of vehicles in a traffic stream.” 14th ARRB Conf., Australian Road Research Board, Vermont South, Victoria, Australia, 14(8), 196–206.
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Copyright
Copyright © 1994 American Society of Civil Engineers.
History
Received: Jan 7, 1993
Published online: Jul 1, 1994
Published in print: Jul 1994
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