Göta älvbron, övervakning med optisk fiber
Ekonomisk analys
The Göta älv-bridge is a welded steelbridge which is located in Gothenburg,it connects the inner city of Gothenburgwith the island Hisingen. Cracks wasdiscovered in the steel in 1999-2000which started an investigation of thebridge to clearify the condition of thebridge. The conclusion was a monitoringsystem based on laser light sent throughan optical fiber.This report describes the bridge, thedamages, the monitoring system and thetraffic on the bridge.Stefan Pup, at Vectura Borlänge was mysupervisor during this work. In myinvestigation the costs of themonitoring system and the costs ofclosing the bridge is compared andevaluated. The biggest investigatingpart is the costs of closing the bridge.The results of my investigations is thatclosing the Göta älv-bridge would cost 1107 300 SEK / day. The monitoring systemhas a cost based on actual costs tiltoday, and forecasts until 2020 when anew bridge is expected to be in place,ending up at 41 144 086 SEK.To close the bridge would cost a lot ofmoney. The monitoring system pays backin about a month with my calculations.That is a quite short time in comparisonwith the 15 years that the bridge hasthis monitoring system.