| 摘要 |
The present invention provides a method for manufacturing a prestressed steel girder, including a component manufacture step for manufacturing an upper flange, a lower flange, and a web shaped into an arch convex upward; a press step for gradually mounting the lower flange, the web, and the upper flange on a press device in order and pressurizing the web to make the web be bent downward; a steel girder integration step for welding the lower flange, the web, and the upper flange to each other while the lower flange, the web, and the upper flange are prestressed; and a prestressing step for tensionally prestressing the upper flange and for compressively prestressing the lower flange by removing the press device. |
