Truck fleet model for design and assessment of flexible pavements

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Title: Truck fleet model for design and assessment of flexible pavements
Authors: Belay, AbrahamO'Brien, Eugene J.Kroese, Dirk P.
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Date: Apr-2008
Online since: 2010-08-10T15:25:33Z
Abstract: The mechanistic empirical method of flexible pavement design/assessment uses a large number of numerical truck model runs to predict a history of dynamic load. The pattern of dynamic load distribution along the pavement is a key factor in the design/ assessment of flexible pavement. While this can be measured in particular cases, there are no reliable methods of predicting the mean pattern for typical traffic conditions. A simple linear quarter car model is developed here which aims to reproduce the mean and variance of dynamic loading of the truck fleet at a given site. This probabilistic model reflects the range and frequency of the different heavy trucks on the road and their dynamic properties. Multiple Sensor Weigh-in-Motion data can be used to calibrate the model. Truck properties such as suspension stiffness, suspension damping, sprung mass, unsprung mass and tyre stiffness are represented as randomly varying parameters in the fleet model. It is used to predict the statistical distribution of dynamic load at each measurement point. The concept is demonstrated by using a pre-defined truck fleet to calculate a pattern of statistical spatial repeatability and is tested by using that pattern to find the truck statistical properties that generated it.
Funding Details: European Research Council
Type of material: Journal Article
Publisher: Elsevier
Journal: Journal of Sound and Vibration
Volume: 311
Issue: 3-5
Start page: 1161
End page: 1174
Copyright (published version): 2007 Elsevier Ltd
Keywords: Multiple SensorWeigh in MotionWIMSpatial repeatabilityDynamic loadFleet modelProbabilisticStatisticalMechanistic empirical
Subject LCSH: Pavements, Flexible--Live loads--Statistical methods
Motor vehicle scales
Spatial analysis (Statistics)
DOI: 10.1016/j.jsv.2007.10.019
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Language: en
Status of Item: Peer reviewed
Appears in Collections:Critical Infrastructure Group Research Collection
Civil Engineering Research Collection

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