CURLING STRESS IN CONCRETE SLAB OF ULTRA-THIN WHITETOPPING STRUCTURE

The basic concept of the design of the white topping is fatigue analysis of concrete slab. The analysis requires not only load stress but also curling stress due to temprerature gradients in the concrete slab. In this tudy, based on the results of temperature measurements and FWD tests conducted on a test pavement, effects of thickness of the concrete slab, stiffness of the asphalt layer, joint spacing and joint stiffness on the curling stress in the concrete slab were investigated with three dimensional finite element method.