| The Colorado Department of Transportation (CDOT) has used a combination of carbon fiber-reinforced polymer (CFRP) bars and externally bonded CFRP fabric to strengthen the arch bridge in Castlewood Canyon State Park. The original bridge was in poor condition and required repair and strengthening to meet increased traffic loads due to widened lanes. During the summer of 2003, the bridge arches were repaired and strengthened. An innovative FRP scheme provides longitudinal reinforcement for flexural enhancement and transverse reinforcement for confinement, shear enhancement, and protection against concrete deterioration and steel corrosion.; The performance of the arch ribs in the Castlewood Canyon Bridge was evaluated by testing four quarter-scale beams in order to model the arch ribs before and after the retrofit. The test results were used to calibrate a theoretical analysis model which was then used to evaluate the strength of the arch ribs. (Abstract shortened by UMI.)... |
