PCI eLearning Course T225: Case Studies and Emerging Developments of Full-Depth Precast Concrete Deck Panels-Analysis of Full Depth Precast Concrete Bridge Deck Panels

Analysis of Full Depth Precast Concrete Bridge Deck Panels

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This document discusses the analysis of full-depth precast concrete bridge deck panels in terms of their design and the amount of longitudinal post-tensioning required to keep the transverse joints in compression. The study concludes that a minimum prestress level of 200 psi is needed for simply supported bridges, while a prestress level of 450 psi is required over the interior supports for continuous bridges. The durability, performance, and cost effectiveness of these precast concrete bridge decks are evaluated to formulate an optimum bridge deck system. The study also highlights the advantages of using a precast system, including minimal traffic interference during construction. Two example bridges, one simply supported and one continuous, are analyzed using finite element modeling to determine the stresses in the transverse joints and the ideal post-tensioning levels. The analysis reveals that a minimum post-tensioning stress level of 200 psi is needed for simply supported bridges and approximately 450 psi is required for continuous bridges. The Illinois Department of Transportation has already implemented the design recommendations and construction procedures from this study in several bridge rehabilitation projects. Overall, the study provides valuable insights into the use of full-depth precast concrete bridge deck panels and their application in bridge rehabilitation and construction.

Keywords

analysis

full-depth precast concrete bridge deck panels

design

longitudinal post-tensioning

transverse joints

compression

prestress level

simply supported bridges

interior supports

continuous bridges