| 摘要 |
PURPOSE: A truss composite bridge structure of an arch type lower route bridge using tapered I-girders is provided to improve the appearance of a bridge by using a composite structure and to improve the ability to construct and the structural efficiency of a bridge by applying a structural type suitable for the kind and size of stress. CONSTITUTION: A truss composite bridge structure of an arch type lower route bridge using tapered I-type girders comprises a plurality of I-girders, a truss structure, a crossbeam, and a bottom plate structure. An I-girder comprises an upper flange, a lower flange widened than the upper flange, and a web. The truss structure is positioned on the upper side of the I-girder and comprises an upper chord member, a lower chord member, and a diagonal bracing. The upper chord member is fixed to a gap between the upper flanges of the I-girder in an end section. The lower chord member is made of the lower flange of the I-girder in a central section. The diagonal bracing connects the upper and lower chord members. The crossbeam is arranged on the upper surface of the lower flange of the I-girder and comprises an upper flange, a lower flange, and a web. The bottom plate structure is installed on the upper side of the crossbeam and comprises a square pipe and a deck (42). |
