Abstract
In this paper, the static behavior of long-span prestressed concrete (PSC) deck slabs under wheel load, including the effects of transverse prestressing and long span length between girders, is studied experimentally. The long-span PSC deck slabs are designed to have the minimum level of slab thickness based on the recent study and long span length between girders for a two-girder composite bridge. The test specimens are scaled to be one third of the actual size to secure enough longitudinal length in the laboratory, which guarantees realistic behavior of the long-span deck slab. Test results show transverse prestressing makes the failure mode of the long-span PSC deck slab changed from flexure-punching mixed to punching shear, but the ultimate strength of the long-span PSC deck slab is more sensitive to concrete strength rather than the amount of prestressing. Test results also indicate the long-span PSC deck slab has enough safety against punching failure in spite of its thickness thinner than the minimum required for RC deck slabs.