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Abstract
In this paper, a new analytical solution is derived for calculating the warping stresses in concrete pavement slab. In the analysis, we consider the pavement slab as a rectangular thick plate resting on Pasternak foundation. The effects of transverse shear deformation and the interlocking action of subgrade are considered in calculating the warping stresses in concrete pavement slabs. The solutions to the fundamental equations of the problem are obtained by superposing the solutions of two elemental slabs. Each of these elemental slabs has two guided support edges and two free edges each acted upon by an unknown bending moment. Numerical examples are presented to compare the solutions of the proposed model with finite element solutions and the Bradbury-Westergaard solutions. The results suggest that for common highway slab dimensions and thickness, the thick-plate model should be used to estimate thermal warping stresses in pavement slabs with a slab width of 3.5 m. However, the conventional thin-plate model could be used for slabs with a width of 7.0 m or more without incurring significant errors.