| 摘要 |
Disclosed is a main girder of a temporary bridge using a prestressing technology, comprising an upper flange and a lower flange horizontally extended in a longitudinal direction, and a web vertically connecting the flanges to each other. The main girder includes: a pair of tendon fixating members installed on an upper surface of the upper flange to be spaced in a longitudinal direction; and a tendon having both ends fixated to the pair of tendon fixation members to be tense, wherein the both ends of the tendon are extracted upwards from the upper flange and the tendon has a middle portion bent in a longitudinal direction to be positioned at the lowest location. The present invention extracts the both ends of the tendon upwards from the upper flange and increases a deviation distance to position the middle portion of the tendon at the lowest location, thereby enhancing an upward force against a load from an upper part. |
