Method for pretensioning steel structure e.g. iron bridge, involves vertically driving lifting element to polymer tapes in region between end anchorages for causing traction force tensioning between end regions of polymer tapes

摘要

The method involves connecting carbon fiber-reinforced polymer tapes (4) with steel girders (3) of a steel structure i.e. iron bridge (1), at end regions in a traction-force fit manner. A lifting element (7) is arranged between the polymer tapes and the steel girders. The lifting element is vertically driven to the polymer tapes in a region between end anchorages (5) for causing traction force tensioning between the end regions of the polymer tapes. The polymer tapes are installed at the steel girders over a length of the steel girders. The lifting element is a hydraulic, pneumatic, electrical or mechanical actuatable lifting element. An independent claim is also included for a steel structure.