Performance Evaluation of Prestressed Concrete Girder Bridges by External Tendon and Continuous Beams

외부긴장재와 연속화에 의한 프리스트레스트 콘크리트 거더교의 성능평가

The development of external prestressing methods has been one of the major trends in the concrete bridge constructions over the past decades. One of the promising methods to enhance the flexural strength of a externally prestressed girder is to place the tendons with large eccentricities. The test results in this study showed that the external prestressing of a composite girder increased the range of the elastic behavior, reduced deflections, increased ultimate strength, and added to the redundancy by providing the multiple stress paths. This study was conducted on the concrete bridges reinforced by the continuous girders and the external prestressing.