Lrfd Flexural Provisions For Prestressed Concrete Bridge Girders Strengthened With Carbon Fiber-Reinforced Polymer Laminates
Polymer; Prestressed concrete; Rehabilitation
The behavior and design of prestressed concrete (PSC) bridge girders flexurally strengthened with carbon fiber-reinforced polymer (CFRP) laminates are discussed. A fiber section model that accounts for inelastic material behavior as well as the construction sequence including transfer, composite action between the cast-in-place deck and girder, and bonding of CFRP laminates, is developed. The model is verified and is then used to conduct thousands of Monte Carlo simulations of a number of bridges designed according to the 1998 AASHTO LRFD. The bridge designs address a broad range of design parameters including span length, ratio of dead load to live load, and amount of CFRP strengthening. The numerical simulations are used to develop cross-sectional resistance models from which the flexural reliability of the designed bridges is calculated using the first-order reliability method. An equation for the flexural strength reduction factor for PSC bridge girders strengthened with CFRP laminates is proposed.
ACI Structural Journal
Number of Pages
Source API URL
El-Tawil, Sherif and Okeil, Ayman M., "Lrfd Flexural Provisions For Prestressed Concrete Bridge Girders Strengthened With Carbon Fiber-Reinforced Polymer Laminates" (2002). Scopus Export 2000s. 2613.