Validation of 3DFE Analysis of Rigid Pavement Dynamic Response to Moving Traffic and Nonlinear Temperature Gradient Effects
Publication: International Journal of Geomechanics
Volume 7, Issue 1
Abstract
The response of dowel jointed concrete pavements to the combined effect of nonlinear thermal gradient and moving axle load is examined using three-dimensional finite-element (3DFE) modeling. The 3DFE-computed response to moving axle load was field validated versus measured concrete slab response to a fully loaded moving dump truck. The 3DFE-predicted slab curling due to nonlinear thermal gradient through the slab thickness was validated versus: (1) corner-dowel bar bending as measured using instrumented dowel embedded in an instrumented rigid pavement section in West Virginia; and (2) Westergaard’s closed-form solution. The effects of slab thickness, slab length, axle loading position, and axle type on slab stresses are examined. It is shown that while a negative temperature gradient reduces the intensity of traffic-induced stresses, positive temperature gradient increases it several fold. Formulas are developed for the computation of the peak principal stresses due to the combined effect of tandem axle load and nonlinear thermal gradient.
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Acknowledgments
This study was sponsored by West Virginia Division of Highways and The Federal Highway Administration. The first writer wishes to express his gratitude to Mr. William Kennis for his fruitful discussion.
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Information
Published In
International Journal of Geomechanics
Volume 7 • Issue 1 • January 2007
Pages: 16 - 24
Copyright
© 2007 ASCE.
History
Received: Sep 27, 2005
Accepted: Sep 27, 2005
Published online: Jan 1, 2007
Published in print: Jan 2007
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