Behavior of a CFT Truss Girder with Precast Decks under Negative Bending Moment

摘要

For the fast construction of bridges, it is necessary to design bridges as light and modular superstructures. For this purpose, a new composite bridge constructed by segmental method is suggested, which consists of concrete filled steel tubular girders and prefabricated concrete decks (Kim 2010). This paper presents a study of the structural behavior of the proposed CFT truss girder at a continuous under negative bending moment. A numerical analysis is performed to verify the structural behaviors of CFT truss girder in continuous support. Based on the results of a numerical analysis, a model with a continuous composite member shape is fabricated and static tests are conducted.