ABSTRACT
Due to Norway’s topography with fjords and islands the demand for bridges is high. The age of these bridges, specifically those constructed between 1960 and 1990, coupled with harsh climate and exposure to seaborn chloride, indicates an anticipated increase in the need for maintenance in the near future. This paper give insight in challenges the asset managers of Møre and Romsdal county is facing. This is illustrated by the case studies of Remøy bridge from 1967 and Runde bridge from 1982. The result of a special inspection by COWI demonstrates how different maintenance strategies is needed based a detailed investigation of the deterioration state. The Remøy bridge will rely on a strategy of Controlled Detoriation to maintain an acceptable Safety level. For the Runde Bridge the rehabilitation strategy is to extend service life by investment in new and modern cathodic protection systems. To be able to inspect and perform maintenance to the bridges in a sustainable way, new technologies must be taken into use and further developed. In this paper drone inspections with thermal images, NDT inspection of post-tensioned strands and rehabilitation with cathodic protection will be discussed.
