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Effect of axle load spreading and support stiffness on the dynamic response of short span railway bridges
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Structural Engineering and Bridges.
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Structural Engineering and Bridges.
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Structural Engineering and Bridges.
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Structural Engineering and Bridges.ORCID iD: 0000-0003-2104-382X
2014 (English)In: Structural Engineering International, ISSN 1016-8664, E-ISSN 1683-0350, Vol. 4, 457-465 p.Article in journal (Refereed) Published
Abstract [en]

In dynamic analyses of railway bridges, the train axle loads are often modeled as moving point forces. However, one effect of the ballast is to spread these point forces. This can lead to large reductions of the bridge response, especially for short span bridges. For this reason, Eurocode prescribes to distribute the axle loads over three adjacent sleepers. In this paper, the axle load distribution is first studied using a plane finite element analysis and based on that, a triangular load distribution is proposed. Then, numerical simulations are performed to compare the effect of this load distribution with the Eurocode one. Both simply supported bridges and bridges with integrated backwalls, all with span lengths less than 10m, are studied. For the later bridges, the effect of the stiffness of the foundation has been studied by adding springs at the supports.

Place, publisher, year, edition, pages
IABSE , 2014. Vol. 4, 457-465 p.
Keyword [en]
Dynamic response, Finite element analysis, Load spread, Short span railway bridges, Support stiffness.
National Category
Infrastructure Engineering
Identifiers
URN: urn:nbn:se:kth:diva-157638DOI: 10.2749/101686614X13854694314360ISI: 000350786300002Scopus ID: 2-s2.0-84913541027OAI: oai:DiVA.org:kth-157638DiVA: diva2:770796
Note

QC 20150202

Available from: 2014-12-11 Created: 2014-12-11 Last updated: 2017-12-05Bibliographically approved

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Battini, Jean-Marc

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Axelsson, ErikSyk, AnnelieÜlker Kaustell, MahirBattini, Jean-Marc
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