The Effect of Loading Configuration and Footprint Geometry on Flexible Pavement Response Based on Linear Elastic Theory

ABSTRACT The analysis of flexible pavements using circular footprint geometry with uniform contact pressure has been used for decades due to the lack of a powerful computational tool that is both reliable and simple to use by pavement engineers. In this paper, the effect of different footprint geometries with different loading configurations including nonuniform, uniform, and average pressures on the response of flexible pavement is investigated by varying the thickness of the AC layer. Our results indicate that the use of circular footprint areas with uniform contact pressure equal to the tire inflation pressure can produce erroneous results that tend to overestimate the predicted fatigue life and rutting life of flexible pavements. Therefore, the pavement response analysis should be carried out using the measured pressure and footprint area when possible. In addition, the results showed that elastic analysis of flexible pavement can be carried out reliably and accurately using advanced computational tools such as the multilayered elastic pavement program MultiSmart3D.

[1]  Jiwon Kim,et al.  Elastic Pavement Analysis Using Infinite Elements , 1997 .

[2]  E. Pan.  Thermoelastic deformation of a transversely isotropic and layered half-space by surface loads and internal sources , 1990 .

[3]  Feng Wang,et al.  Mechanistic-Empirical Study of Effects of Truck Tire Pressure on Pavement: Measured Tire-Pavement Contact Stress Data , 2006 .

[4]  Ernian Pan,et al.  Static response of a transversely isotropic and layered half-space to general dislocation sources , 1989 .

[5]  F Bonnaure,et al.  A NEW METHOD FOR PREDICTING THE FATIGUE LIFE OF BITUMINOUS MIXES , 1980 .

[6]  Imad L. Al-Qadi,et al.  In-situ validation of mechanistic pavement finite element modeling , 2004 .

[7]  Pan Ernian.  Static response of a transversely isotropic and layered half-space to general surface loads , 1989 .

[8]  Emmanuel G Fernando,et al.  Evaluation of Predicted Pavement Response with Measured Tire Contact Stresses , 2005 .

[9]  E. Pan,et al.  An Exploratory Study on Functionally Graded Materials with Applications to Multilayered Pavement Design , 2007 .

[10]  E. Pan.  Static Green's functions in multilayered half spaces , 1997 .

[11]  D W Potter,et al.  Revision of NAASRA interim guide to pavement thickness design , 1985 .

[12]  Eyad Masad,et al.  Effects of Nonuniform Tire Contact Stresses on Pavement Response , 2005 .

[13]  E. J. Yoder.  Principles of Pavement Design , 1959 .

[14]  Shmuel L. Weissman.  Influence of Tire-Pavement Contact Stress Distribution on Development of Distress Mechanisms in Pavements , 1999 .

[15]  David H Timm,et al.  BEST PRACTICES FOR THE DESIGN AND CONSTRUCTION OF LOW VOLUME ROADS , 2002 .

[16]  Jorge A Prozzi,et al.  EVALUATION OF THE JOINT EFFECT OF WHEEL LOAD AND TIRE PRESSURE ON PAVEMENT PERFORMANCE , 2005 .

[17]  Ronald Blab.  Introducing Improved Loading Assumptions into Analytical Pavement Models Based on Measured Contact Stresses of Tires , 1999 .

[18]  O J Svec,et al.  Effects of tire – pavement contact pressure distributions on the response of asphalt concrete pavements , 1995 .