The Göta älv-bridge is a welded steel
bridge which is located in Gothenburg,
it connects the inner city of Gothenburg
with the island Hisingen. Cracks was
discovered in the steel in 1999-2000
which started an investigation of the
bridge to clearify the condition of the
bridge. The conclusion was a monitoring
system based on laser light sent through
an optical fiber.
This report describes the bridge, the
damages, the monitoring system and the
traffic on the bridge.
Stefan Pup, at Vectura Borlänge was my
supervisor during this work. In my
investigation the costs of the
monitoring system and the costs of
closing the bridge is compared and
evaluated. The biggest investigating
part is the costs of closing the bridge.
The results of my investigations is that
closing the Göta älv-bridge would cost 1
107 300 SEK / day. The monitoring system
has a cost based on actual costs til
today, and forecasts until 2020 when a
new bridge is expected to be in place,
ending up at 41 144 086 SEK.
To close the bridge would cost a lot of
money. The monitoring system pays back
in about a month with my calculations.
That is a quite short time in comparison
with the 15 years that the bridge has
this monitoring system.