ABSTRACT
This paper presents an analytical investigation of the structural behaviour of a reinforced concrete (RC) void slab bridge of which top 10 cm surface concrete is replaced with Ultra-High Performance Fibre Reinforced cement-based Composites (UHPFRC) where nonlinear three-dimensional finite element method is employed. UHPFRC layer on top of the bridge deck modifies the bending moment distribution behaviour of the bridge and contributes to strengthening the bridge for both hogging and sagging bending. In addition, the UHPFRC layer changes the shear stress state of the bridge deck and improves the safety for shear. Replacement of top surface concrete with UHPFRC is understood to be a effective method for improving RC void slab bridges.
