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Extend the life of existing railway bridges: Results from EU FP7 project MAINLINE
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.ORCID iD: 0000-0002-1398-6118
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.ORCID iD: 0000-0002-5154-7044
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.ORCID iD: 0000-0001-7799-5809
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2015 (English)In: IABSE Conference Geneva 2015: Structural Engineering: Providing Solutions to Global Challenges, Geneva: International Association for Bridge and Structural Engineering, 2015, p. 1219-1226Conference paper, Published paper (Other academic)
Abstract [en]

There is a need to extend the life and capacity of many existing bridges. One of the objects of the EU FP7 Project MAINLINE, 2011-2014, was to facilitate this. Guidelines for assessment and strengthening methods are presented as well as case studies in which existing bridges are studied in order to extend their life length. One example is the prestressing of the slab in a one-span concrete trough bridge in order to increase its load-carrying capacity. Horizontal holes were drilled trough the slab and in them steel bars were placed and post-tensioned. In this way a compressive stress was introduced into the concrete section so that it’s bending and shear capacity was increased.In another study a metal truss bridge was monitored in order to check strain and stress ranges in critical connections to enable an enhanced evaluation of the remaining fatigue resistance. The studied bridge was then replaced and loaded to failure to study its robustness and the reliability of applied assessment methods. The results could then be applied to prolong the life of an identical twin bridge located in the northern part of Sweden. A Life Cycle Assessment Tool (LCAT) has been developed to enable Infrastructure Managers to choose optimal maintenance strategies.

Place, publisher, year, edition, pages
Geneva: International Association for Bridge and Structural Engineering, 2015. p. 1219-1226
National Category
Infrastructure Engineering
Research subject
Structural Engineering; Attractive built environment (AERI)
Identifiers
URN: urn:nbn:se:ltu:diva-31658Scopus ID: 84971229053Local ID: 5e814bc4-21a1-4935-99b6-6d8bde81836aISBN: 9783857481406 (print)OAI: oai:DiVA.org:ltu-31658DiVA, id: diva2:1004892
Conference
IABSE Conference : Structural Engineering: Providing Solutions to Global Challenges 23/09/2015 - 25/09/2015
Projects
Mainline-MAINtenance, renewaL and Improvement of rail transport iNfrastructure to reduce Economic and environmental impacts
Note
Godkänd; 2015; 20150923 (andbra)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-03-26Bibliographically approved

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Scopushttp://www.iabse.org/Geneva2015Report

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Nilimaa, JonnyHäggström, JensBlanksvärd, ThomasTäljsten, BjörnElfgren, LennartTu, Yongming

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