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Assessment of anchorage capacity of naturally corroded reinforcement
Chalmers University of Technology, Sweden.
RISE, SP – Sveriges Tekniska Forskningsinstitut, CBI Betonginstitutet AB.ORCID iD: 0000-0003-4565-5345
Chalmers University of Technology, Sweden.
Chalmers University of Technology, Sweden.
2013 (English)In: Assessment, Upgrading and Refurbishment of Infrastructures, International Association for Bridge and Structural Engineering (IABSE) , 2013Conference paper, Published paper (Refereed)
Abstract [en]

Corrosion of reinforcement is a significant cause of deterioration in existing structures. While this topic has been extensively studied using artificially corroded test specimens, little is known about the actual response of naturally corroded structures. Overall, the literature suggests that drastic reduction of the corrosion time, i.e. from years to days, in accelerated corrosion process, might markedly influence the bond and the anchorage capacity of a reinforced concrete member. Consequently, the anchorage capacity of specimens with naturally corroded reinforcement was investigated. Since a large scatter was observed in the tests of the first series, see [1, 2], fourteen more specimens were tested in a second round using samples from the other side of the same bridge. The specimens were carefully documented regarding crack patterns, crack widths, and spalled regions before testing. In all cases, diagonal shear cracks preceded a splitting-induced pullout failure; i.e. anchorage failure was achieved as expected. Subsequent work will combine results from both test series, such as load versus deflection, free end-slip and crack patterns; and compare these with the predictions from detailed nonlinear finite element modelling, using the available bond and corrosion models. These will result in a better understanding of the structural behaviour of corroded reinforced concrete structures to field conditions.

Place, publisher, year, edition, pages
International Association for Bridge and Structural Engineering (IABSE) , 2013.
Keywords [en]
Anchorage, Bond, Natural corrosion, Reinforced concrete beam test, Structural behaviour, Anchorages (foundations), Bonding, Concrete beams and girders, Concretes, Corrosion, Cracks, Finite element method, Accelerated corrosion process, Corroded reinforcement, Corroded structures, Corrosion of reinforcement, Nonlinear finite element modelling, Reinforced concrete beams, Reinforced concrete member, Reinforced concrete
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:ri:diva-47529Scopus ID: 2-s2.0-84928804879ISBN: 9783857481239 (print)OAI: oai:DiVA.org:ri-47529DiVA, id: diva2:1464911
Conference
IABSE Workshop on Assessment, Upgrading and Refurbishment of Infrastructures, 6 May 2013 through 8 May 2013
Available from: 2020-09-08 Created: 2020-09-08 Last updated: 2020-12-01Bibliographically approved

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