- 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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- Design Issues for Dynamics of High Speed Railway Bridges
- J. Goicolea ; F. Gabaldón ; F Riquelme
- Book Title / Journal: International Assoc for Bridge Maintenance and Safety, Porto, Portugal
- Year: 2006 , Volume: , Series:
- Bridge management ; Bridges
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- Dynamic analysis of structures under high speed train loads: case Studies in Spain
- F. Gabaldón ; F Riquelme ; J. Goicolea ; J Arribas
- Book Title / Journal: Dynamics of High-Speed Railway Bridges
- Year: 2005 , Volume: , Series:
- Bridge management ; Bridges
- Description
- A relevant aspect in the design of structures under high speed train loads is the dynamical effects associated to the moving loads of the train. In this paper some calculation methods that are usual in the design of high speed train structures are considered. These methods are based on the integration of the motion equations, with or without considering the vehicle–structure interaction. Some applications of the vehicle–structure interaction models are shown in order to analyse the dynamical response of short span bridges, with emphasis in the possible reduction of the
dynamical effects associated to these models. To this end the results obtained using both interaction models and point moving loads are compared. Finally some dynamic analyses of singular bridges in the Spanish high speed lines are presented, showing results of interest for the design of these viaducts. The methodology followed in these calculations corresponds to the Spanish IAPF 2003 code and the Eurocode 1 (EN1991–2).
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