PCI eLearning Course T210: Introduction on Full-Depth Panel Precast Concrete Deck System and its Advantages-Analysis of Full Depth Precast Concrete Bridge Deck Panels

Analysis of Full Depth Precast Concrete Bridge Deck Panels

Pdf Summary

The study analyzed the use of full depth precast concrete bridge deck panels for the replacement and rehabilitation of deteriorated bridge decks. The researchers aimed to determine the amount of post-tensioning needed in the longitudinal direction to secure the tightness of the adjacent transverse joints and keep them in compression. The analysis was done using finite element modeling of simply supported and continuous bridges.<br /><br />The results showed that a minimum prestress level of 200 psi (1.4 MPa) was needed for simply supported bridges, while a prestress level of 450 psi (3.1 MPa) was needed over the interior supports for continuous bridges. The study also found that the use of longitudinal post-tensioning was important in keeping the transverse joints in compression and preventing debonding.<br /><br />The researchers recommended the use of full depth precast concrete bridge deck panels for bridge rehabilitation and replacement projects. The system had several advantages, including minimal traffic interference during construction and the ability to be installed on steel stringers or precast, prestressed concrete girders. The study provided design recommendations and construction procedures for the implementation of the system.<br /><br />The findings of the study were applied in several bridge deck replacement projects carried out by the Illinois Department of Transportation. Two examples of these projects were described, including a four-span bridge over I-57 in Williamson County and a four-span bridge over I-74 in Knox County.<br /><br />Overall, the study demonstrated the effectiveness of full depth precast concrete bridge deck panels for bridge rehabilitation and replacement, providing recommendations for design and construction that have been implemented in real-world projects.

Keywords

full depth precast concrete bridge deck panels

bridge deck replacement

deteriorated bridge decks

post-tensioning

longitudinal direction

transverse joints

compression

finite element modeling

simply supported bridges

continuous bridges