Use of FRP Materials in Bridge Construction for St. James, Missouri - Walters Street Bridge Installation

摘要

This article outlines the configuration and installation of the last of the four FRP bridges in St. James, Missouri. The Walters Street Bridge consists of nine precast concrete bridge panels, each 1 -foot deep, which are reinforced with FRP reinforcing bars. The bridge is 24-feet long and 25-feet, 6-inches wide and was designed according to AASHTO deflection requirements for a standard HS20 truck loading.The concrete deck panels are reinforced with commercially available carbon fiber FRP (CFRP) and glass fiber FRP (GFRP) reinforcing bars with the following properties -- For the CFRP bars, a guaranteed design tensile strength of 270 ksi and a tensile elastic modulus of 15.2 Msi were given by the manufacturer. For the GFRP bars these values were about 60 percent lower, or 105 ksi and 6.0 Msi, respectively. The panels were designed according to the now available ACI Committee 440 guidelines for reinforcing concrete with FRP bars.