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Elastoplastic Modelling of an In Situ Concrete Spalling Experiment using the Ottosen Failure Criterion

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Uotinen, Lauri
dc.contributor.author Siren, Topias
dc.date.accessioned 2017-01-19T11:10:43Z
dc.date.issued 2017-01-31
dc.identifier.citation Uotinen , L & Siren , T 2017 , ' Elastoplastic Modelling of an In Situ Concrete Spalling Experiment using the Ottosen Failure Criterion ' , Journal of Engineering , vol. 2017 , 4723017 . https://doi.org/10.1155/2017/4723017 en
dc.identifier.issn 2314-4904
dc.identifier.other PURE UUID: a4589661-86e2-43cb-9e63-13c505b603cd
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/elastoplastic-modelling-of-an-in-situ-concrete-spalling-experiment-using-the-ottosen-failure-criterion(a4589661-86e2-43cb-9e63-13c505b603cd).html
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/11427405/uotinenetal_journ_engineering_hindawi.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/24292
dc.description.abstract An in situ concrete spalling experiment will be carried out in the ONKALO rock characterization facility. The purpose is to establish the failure strength of a thin concrete liner on prestressed rock surface, when the stress states in both rock and concrete are increased by heating. A cylindrical hole 1.5 m in diameter and 7.2 m in depth is reinforced with a 40 mm thin concrete liner from level -3 m down. Eight 6 m long 4 kW electrical heaters are installed around the hole 1 m away. The experiment setup is described and results from predictive numerical modelling are shown. Elastoplastic modelling using the Ottosen failure criterion predicts damage initiation on week 5 and the concrete ultimate strain limit of 0.0035 is exceeded on week 10. The support pressure generated by the liner is 3.2 MPa and the tangential stress of rock is reduced by -33 %. In 2D fracture mechanical simulations, the support pressure is 3 MPa and small localized damage occurs after week 3 and damage process slowly continues during week9 of the heating period. In conclusion, external heating is a potent way of inducing damage and thin concrete liner significantly reduces the amount of damage. en
dc.format.extent 33
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries Journal of Engineering en
dc.rights openAccess en
dc.title Elastoplastic Modelling of an In Situ Concrete Spalling Experiment using the Ottosen Failure Criterion en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Civil Engineering
dc.subject.keyword Concrete
dc.subject.keyword Thin liner
dc.subject.keyword Spalling
dc.subject.keyword Numerical modelling
dc.subject.keyword Ottosen
dc.subject.keyword Plasticity
dc.identifier.urn URN:NBN:fi:aalto-201701191237
dc.identifier.doi 10.1155/2017/4723017

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