Modelling of Flexible Pavements with Thin Bituminous Surfacing – Using Linear Elastic Theory and Finite Element Method

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Title Modelling of Flexible Pavements with Thin Bituminous Surfacing – Using Linear Elastic Theory and Finite Element Method
Author Chai, Gary; Guan, Hong; Van Staden, Rudi Cobus; Whittaker, Kaleb Matthew; Loo, Yew-Chaye
Publication Title The 7th International Conference on Road and Airfield Pavement Technology: new horizon of pavement technology
Editor Yongyuth Taesiri and Direk Lavansiri
Year Published 2011
Place of publication Bangkok, Thailand
Publisher International Committee on Road and Airfield Pavement Technology
Abstract Flexible road pavements are important transport infrastructure in Australia for providing an all weather road network for a population of 22 million people with land size of about 7 million square kilometres. Between the surfacing types, sprayed seal and thin asphalt are most commonly used by State and Local Governments for rural road construction. Asphalt fatigue and subgrade deformation from repeated loading over time are the most common failure mechanisms and these in turn are the major attributors to the pavement maintenance and rehabilitation cost. Thin surfacing pavements with a weak road base and foundation often exhibit plastic deformation in the base and subgrade layers. Linear Elastic Theory (LET) and Finite Element Method (FEM) based numerical analyses have been widely used in research to develop pavement models and replicate realistic vehicular loadings. The thin surfacing pavement is modelled using LET and FEM with three-dimensional (3D) ideal elastic layered system and two-dimensional (2D) axisymmetrical elements, respectively. The vertical displacements at the top of the asphalt layer are determined using both LET and FEM and the findings compared to the measured field data. Results show that the deflections generated by the FEM are in closer agreement with the field data. At a horizontal distance of 700 to 1500mm from the loading significant displacement variances from the field data are found for both LET and FEM.
Peer Reviewed Yes
Published Yes
Publisher URI
Conference name International Conference on Road & Airfield Pavement Technology (ICPT)
Location Bangkok, Thailand
Date From 2011-08-03
Date To 2011-08-05
Date Accessioned 2011-10-18; 2012-02-17T05:11:58Z
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Numerical Analysis
Publication Type Conference Publications (Full Written Paper - Refereed)
Publication Type Code e1

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