Rose Fitzgerald Kennedy Bridge – Prestressing Technologies
摘要
The Rose Fitzgerald Kennedy Bridge over the river Barrow is the most iconic element of the N25 - New Ross Bypass project, which is aimed to optimize the traffic across south-eastern Ireland. It extends for almost 900 m, with two 230 m long main spans, and is the world’s longest prestressed concrete extradosed bridge. Several prestressing technologies are installed in the structure, namely bonded post-tensioning tendons and parallel strand stay cables with multi-tubes saddles. After introducing the structural features of an extradosed bridge, the focus is on prestressing systems qualification and installation within the different construction methods adopted.