Several researchers have reported on the use of full depth precast concrete bridge deck panels for the replacement and rehabilitation of deteriorated bridge decks. They presented the advantages of the system and generally recommended viable alternatives to many aspects of the system. However, a critical aspect of the system in terms of design is the consideration of the longitudinal post-tensioning. This paper presents the analysis of selected simply supported and continuous bridges using finite element modeling of the structural system. The objective of this analytical study was to determine the amount of posttensioning needed in the longitudinal direction to secure the tightness of the adjacent transverse joints and to keep them in compression. Results of the study indicate that the minimum prestress level is 200 psi (1.4 MPa) for simply supported bridges, while a prestress level of 450 psi (3. 1 MPa) is needed over the interior supports for continuous bridges.
