Ultra-High-Performance Concrete Bridge Deck Reinforced with High-Strength Steel

摘要

The authors report an interesting development of ultra-high-performance concrete (UHPC) bridge deck elements with strict self-weight requirements. Looking at the geometry of the single-unit deck panel shown in Fig. 1, the following remarks arise: the concrete covers on both sides of the reinforcing bars in the longitudinal and transverse ribs are quite small, which might allow longitudinal cracks to occur due to bond along the reinforcing bars, resulting in the loss of stiffness and widening of the shear crack, which reduces the load-bearing capacity of the deck panel. These horizontal cracks can be seen in each photograph showing the shear cracks (Fig. 7(b), 8(b), and 9(b)).