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Elastoplastic Modelling of an In Situ Concrete Spalling Experiment Using the Ottosen Failure Criterion
Joint Authors
Uotinen, Lauri Kalle Tapio
Siren, Topias Kalle Aleksi
Source
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-16, 16 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-01-31
Country of Publication
Egypt
No. of Pages
16
Main Subjects
Abstract EN
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 week 9 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.
American Psychological Association (APA)
Uotinen, Lauri Kalle Tapio& Siren, Topias Kalle Aleksi. 2017. Elastoplastic Modelling of an In Situ Concrete Spalling Experiment Using the Ottosen Failure Criterion. Journal of Engineering،Vol. 2017, no. 2017, pp.1-16.
https://search.emarefa.net/detail/BIM-1175152
Modern Language Association (MLA)
Uotinen, Lauri Kalle Tapio& Siren, Topias Kalle Aleksi. Elastoplastic Modelling of an In Situ Concrete Spalling Experiment Using the Ottosen Failure Criterion. Journal of Engineering No. 2017 (2017), pp.1-16.
https://search.emarefa.net/detail/BIM-1175152
American Medical Association (AMA)
Uotinen, Lauri Kalle Tapio& Siren, Topias Kalle Aleksi. Elastoplastic Modelling of an In Situ Concrete Spalling Experiment Using the Ottosen Failure Criterion. Journal of Engineering. 2017. Vol. 2017, no. 2017, pp.1-16.
https://search.emarefa.net/detail/BIM-1175152
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1175152