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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 (Engelska)Ingår i: Assessment, Upgrading and Refurbishment of Infrastructures, International Association for Bridge and Structural Engineering (IABSE) , 2013Konferensbidrag, Publicerat paper (Refereegranskat)
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.

Ort, förlag, år, upplaga, sidor
International Association for Bridge and Structural Engineering (IABSE) , 2013.
Nyckelord [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
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Teknik och teknologier
Identifikatorer
URN: urn:nbn:se:ri:diva-47529Scopus ID: 2-s2.0-84928804879ISBN: 9783857481239 (tryckt)OAI: oai:DiVA.org:ri-47529DiVA, id: diva2:1464911
Konferens
IABSE Workshop on Assessment, Upgrading and Refurbishment of Infrastructures, 6 May 2013 through 8 May 2013
Tillgänglig från: 2020-09-08 Skapad: 2020-09-08 Senast uppdaterad: 2020-12-01Bibliografiskt granskad

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Zandi, Kamyab

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