Analysis of Critical Locations in Double-layered Cement Concrete Pavement Structure

Abstract:

Since the rigid and semi-rigid materials being commonly employed to be as base in cement concrete highways construction in China, based upon a model of double-layered structure with unequal planar dimensions resting on an elastic foundation, by using the finite element method, the maximum loading stress locations and magnitudes, corresponding axle load positions and the effect of multi-axle loads are thoroughly discussed, the influence lines of the maximum stresses under moving axle loads are also analyzed; while axle loads acting on different pavement positions (including offset of axle loads) the loading stresses in pavement structure with/without base extension are discussed; furthermore, the coupling effect of temperature curling and axle loads action jointly is also studied, However, the results can provide a sound basis for determining the critical locations in cement concrete pavement structure.