PSI - Issue 22

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ScienceDirect Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000 – 000

www.elsevier.com/locate/procedia

Procedia Structural Integrity 22 (2019) 64–69

First International Symposium on Risk and Safety of Complex Structures and Components Evolution of the design of iron and steel railway bridges in France at First International Symposium on Risk and Safety of Complex Structures and Components Evolution of the design of iron and steel railwa bridges in France at

the end of the 19th century Stéphane Sire a *, Muriel Ragueneau b a University of Brest, IRDL, CNRS UMR 6027, 29200 Brest, France b SNCF Réseau, DGII-OA, 93210 La Plaine Saint-Denis, France the end of the 19th century Stéphane Sire a *, Muriel Ragueneau b a University of Brest, IRDL, CNRS UMR 6027, 29200 Brest, France b SNCF Réseau, DGII-OA, 93210 La Plaine Saint-Denis, France

© 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the First International Symposium on Risk and Safety of Complex Structures and Components organizers © 2019 The Authors. Published by Elsevier B.V.This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the First International Symposium on Risk and Safety of Complex Structures and Components organizers Abstract Th French railway netw rk includes over 30 000 km of railway tracks and m r than 5000 metallic bridges. Some of them have been in service for over a century and th y n ed adapted measures for their maintenance. Due to th cre se of rol ing speed nd axle load, fatigu is one of the main phenomena to take into account in ord to extend the safe s rvice life o metall c b dges. In order to bet er understand how old bridges behav , a specific Ag ssiveness Index (AI) has been defined and e ables to com re the eff ct of different rolling stocks on the mechanical behaviour of stringers. This index was tested f t diff rent histo ical typ tr ins. F r these calculation , a set of eal str ngers was considered, includi g different periods of constructi n, di f rent pans and inertias. The SIA fatigue curve with  c =80MPa has been chosen taking into account historical allowable fatigue stress. The calculation model of stresses in stringers of this study shows a good agreement with t e SNCF historical inv tory of repairs. © 2019 The Autho s. Publ shed by Elsev er B.V.This is an open access article u er th CC BY-NC-ND li ens (http://cr a ivecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the First International Symposium on Risk and Safety of Complex Structures and Components organizer Abstract The French railway network includes over 30 000 km of railway tracks and more than 5000 metallic bridges. Some of them have been in service for over a century and they need adapted measures for their maintenance. Due to the increase of rolling speed and axle load, fatigue is one of the main phenomena to take into account in order to extend the safe service life of metallic bridges. In order to better understand how old bridges behave, a specific Agressiveness Index (AI) has been defined and enables to compare the effect of different rolling stocks on the mechanical behaviour of stringers. This index was tested fot different historical type trains. For these calculations, a set of real stringers was considered, including different periods of construction, different spans and inertias. The SIA fatigue curve with  c =80MPa has been chosen taking into account historical allowable fatigue stress. The calculation model of stresses in stringers of this study shows a good agreement with the SNCF historical inventory of repairs. Keywords: railway bridges; fatigue; stringers; regulations; historical inventory

Keywords: railway bridges; fatigue; stringers; regulations; historical inventory

* Corresponding author. Tel.: +33 298 478 034. E-mail address: stephane.sire@univ-brest.fr * Corresponding author. Tel.: +33 298 478 034. E mail address: st phane.sire@un v-brest.fr

2452-3216 © 2019 The Authors. Published by Elsevier B.V.This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review statement: Peer-review under responsibility of the First International Symposium on Risk and Safety of Complex Structures and Components organizers 2452-3216 © 2019 The Authors. Published by Elsevier B.V.This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review statement: Peer-review under responsibility of the First International Symposium on Risk and Safety of Complex Structures and Components organizers

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