| 摘要 |
A composite girder of a bridge is provided to prevent the distortion caused by dynamic load transferred from a bridge slab, to make maintenance easy, and to promote stability and reduce installation quantity by increasing the strength of a girder and decreasing the height to the utmost. A composite girder of a bridge is placed between a bridge slab and a pier to support a bridge slab, and composed of a girder main body, and many steel wires(300) prestressing the girder main body, wherein the girder main body comprises a bottom portion(210) put on the top of the pier, a pair of vertical portions erected on the upper part of the bottom portion, a slab support portion extended to the top of the vertical portion to support the bridge slab, a finishing portion(240) formed on two longitudinal ends of the girder main body together with the bottom portion and the vertical portion to connect the bottom portion and the vertical portion to reinforce the structure, stiffening ribs formed on the end of the finishing portion and the outside of the vertical portion to be inclined to reinforce the joint of the finishing portion and the vertical portion, a partition wall unified with the vertical portion to connect vertical portions to reinforce the strength of the vertical portion, and a central partition portion(243) projected to the outside of the vertical portion to be connected to the slab support portion and the bottom portion, and the steel wires are tightened to a steel wire fastening groove(241) using a fastener(310) via the finishing portion and arranged to the girder main body in a longitudinal direction to support the girder main body. |
