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Loading to failure and 3D nonlinear FE modelling of a strengthened RC bridge.
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.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.ORCID iD: 0000-0002-8682-876X
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.ORCID iD: 0000-0002-5154-7044
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2014 (English)In: Structure and Infrastructure Engineering, ISSN 1573-2479, E-ISSN 1744-8980, Vol. 10, no 12, p. 1606-1619Article in journal (Refereed) Published
Abstract [en]

A reinforced concrete railway trough bridge in Örnsköldsvik, Sweden, was strengthened in bending with rods of carbon-fibre-reinforced polymer and loaded to failure. The aim was to test and calibrate methods developed in the European Research Project ‘Sustainable Bridges’ regarding assessment and strengthening of existing bridges. A steel beam was placed in the middle of one of the two spans and was pulled downwards. Failure was reached at an applied load of 11.7 MN. It was initiated by a bond failure caused by a combined action of shear, torsion as well as bending after yielding in the longitudinal steel reinforcement and the stirrups. The bond failure led to a redistribution of the internal forces from the tensile reinforcement to the stirrups, causing the final failure. The computer models developed to simulate the loading process were improved step by step from linear shell models to more detailed models. The most developed model, a three-dimensional nonlinear finite element model with discrete reinforcement, gave accurate accounts of the response of the bridge.

Abstract [en]

A reinforced concrete railway trough bridge in Örnsköldsvik, Sweden, was strengthened in bending with rods of Carbon Fiber Reinforced Polymer (CFRP) and loaded to failure. The aim was to test and calibrate methods developed in the European Research Project "Sustainable Bridges" regarding assessment and strengthening of existing bridges. A steel beam was placed in the middle of one of the two spans and was pulled downwards. An interesting failure was reached, which included bond, shear and torsion as well as bending, for an applied load of 11,7 MN. Three dimensional nonlinear finite element calculations with discrete reinforcement were used to simulate the loading process. The developed models – after several trials and errors - gave accurate accounts of the response of the bridge during increasing loading.

Place, publisher, year, edition, pages
2014. Vol. 10, no 12, p. 1606-1619
Keywords [en]
Civil engineering and architecture - Building engineering
Keywords [sv]
Samhällsbyggnadsteknik och arkitektur - Byggnadsteknik
National Category
Infrastructure Engineering
Research subject
Structural Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-14810DOI: 10.1080/15732479.2013.836546ISI: 000348944400001Scopus ID: 2-s2.0-84908043589Local ID: e3ae0583-b31d-4593-bf2d-f796601dcca4OAI: oai:DiVA.org:ltu-14810DiVA, id: diva2:987783
Projects
Sustainable Bridges
Note
Validerad; 2014; 20130606 (elfgren)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Puurula, ArtoEnochsson, OlaSas, GabrielBlanksvärd, ThomasOhlsson, UlfBernspång, LarsTäljsten, BjörnElfgren, Lennart

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