- Service limit states for railway bridges in new design codes IAPF and Eurocodes
- J. Goicolea-Ruigómez
- Book Title / Journal: Track-Bridge Interaction on High-Speed Railways, FEUP, Porto, Portugal
- Year: 2007 , Volume: , Series:
- Bridge management ; Bridges
- Description
- The new and enhanced performance needs of bridges for high-speed railway lines have
prompted new requirements for design of structur
es. These have been studied at national and
international level within Europe (ERRI, UIC,
Eurocode project teams) and have originated
new engineering codes for actions and design re
quirements. Between these we may cite the
Eurocodes EN1991-2 (2003) and EN1990-A1 (2005) and the new Spanish code IAPF (2007).
An important feature in these codes is the consideration of service limit states. These limit
states are unique to railway bridges and are often the critical features conditioning the design.
Among these limits are the maximum of displacemen
ts and stresses in the rail related to track-
bridge interaction, and the limit of accelerations at
the track. It must be stressed that some of
these service limit states are indeed ultimate limit states related to safety of rail traffic, and
hence of the utmost importance. In this work we shall review these limitations, the methods
proposed for calculation, and their relevance for design.
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