Extending the fatigue service life of a railway bridge by local approaches
2013 (English)Conference paper (Refereed)
In this paper, fatigue assessment of a steel railway bridge is presented. The bridge is located in central Stockholm, Sweden, and is one of the most vital links for the railway network. The bridge services both freight trains and commuter trains with more than 500 passages per day. The main load bearing structure is designed as a steel grillage of welded I-beams. Fatigue critical sections have been identified at locations where secondary bracing systems are welded to the flanges of the I-beams. Both numerical simulations and extensive field measurements have shown a significant exceedance of the theoretical fatigue service life. Based on analysis of local stress concentrations, improvement of fatigue critical details have been suggested. The decrease in stress concentration is demonstrated both by numerical simulations and in-situ field measurements and shows a significant improvement when estimating the remaining fatigue service life.
Place, publisher, year, edition, pages
cumulative fatigue damage; railway bridge; hotspot stress; finite element method.
IdentifiersURN: urn:nbn:se:kth:diva-103599OAI: oai:DiVA.org:kth-103599DiVA: diva2:560848
International IABSE Conference, Rotterdam May 6 - 8, 2013 Assessment, Upgrading and Refurbishment of Infrastructures
QC 201304222013-04-222012-10-162013-04-22Bibliographically approved