Carbon Fiber-Reinforced Polymer Strengthening and Monitoring of the Gröndals Bridge in Sweden
Publication: Journal of Composites for Construction
Volume 11, Issue 2
Abstract
The Gröndal Bridge is a large freivorbau bridge (prestressed concrete box bridge), approximately in length with a free span of . It was opened to tram traffic in the year 2000. Just after opening cracks were noticed in the webs, these cracks have then increased, the size of the largest cracks exceeded , and at the end of 2001 the bridge was temporarily strengthened. This was carried out with externally placed prestressed steel stays. The reason for the cracking is still debated and will be further discussed in this paper. Nevertheless, it was clear that the bridge needed to be strengthened. The strengthening methods used were CFRP plates at the serviceability limit state and prestressed dywidag stays at the ultimate limit state. The strengthening was carried out during 2002. At the same time monitoring of the bridge commenced, using LVDT crack gauges as well as optical fiber sensors.
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Acknowledgments
The research presented in this paper has been funded by several organizations. Here the Development fund of the Swedish Construction Industry, Stockholm Transport (SL) and Skanska Sverige AB should be acknowledged.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 11 • Issue 2 • April 2007
Pages: 227 - 235
Copyright
© 2007 ASCE.
History
Received: Sep 21, 2005
Accepted: Jun 7, 2006
Published online: Apr 1, 2007
Published in print: Apr 2007
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