Rose Fitzgerald Kennedy Bridge by Marcos Sanchez, Arup, and Lucia Blanco Martin, CFCSL скачать в хорошем качестве

Rose Fitzgerald Kennedy Bridge by Marcos Sanchez, Arup, and Lucia Blanco Martin, CFCSL

Date: Tuesday 26th January 2021 Time: 18.30 Venue: Online through Microsoft Teams Lecture By: Marcos Sanchez, Arup, and Lucia Blanco Martin, CFCSL The Rose Fitzgerald Kennedy Bridge is a nine-span, three-tower, 887m-long extradosed bridge with a single central plane of cables supporting four traffic lanes. Its two main spans of 230m each are the longest post-tensioned extradosed concrete spans in the world. While there are longer spans in extradosed bridges, they all take advantage of a lighter steel composite section in the central part of the main span. Rising 36m above the River Barrow to provide navigational clearance for access to the Port of New Ross, the structure is impressive in both scale and slenderness. The river’s eastern bank is lower than the west, with a sharp rock slope on the west and a significant flood plain on the east. For most of the deck, and particularly the main spans which are on a 5% slope, this topography was an important consideration during the design. Resilience and robustness were the main goals when designing the structure, including state-of-the-art analysis of extreme event scenarios such as ship impact, fire and wind. Extensive hydrodynamic modelling was carried out to determine riverbed scour and sedimentation patterns, ensuring minimal impacts on the environment and navigational channel. Design and construction commenced in early 2016, with substantial completion in late 2019. The bridge opened to traffic on 29 January 2020. It holds multiple records, including the longest bridge in Ireland, the longest concrete extradosed spans in the world and, during construction, the longest balanced cantilever for concrete deck extradosed bridges in the world. In this lecture, the design team will outline how the design and construction of this world-class 21st century structure re-defined expectations for bridge engineering, both nationally and internationally.