Computers and Concrete

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Extension of theoretical approaches for the shear strength of reinforced concrete beams with corroded stirrups

  • Pier Paolo, Rossi (Department of Civil Engineering and Architecture, University of Catania) ;
  • Nino, Spinella (Department of Civil Engineering and Architecture, University of Catania)
  • Received : 2021.06.01
  • Accepted : 2022.11.10
  • Published : 2023.01.25
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Abstract

This paper proposes and validates the extension of two models, previously formulated for the evaluation of the shear strength of reinforced concrete members with un-corroded reinforcements, to the case of beams with corroded stirrups. These extended models are based on the plasticity theory (this model has been proposed in the past by one of the authors) and on the simplified modified compression field theory. The response of these models is compared with that of the compression chord capacity model, which has recently been embedded with modifications that simulate the effects of steel corrosion. These latter modifications are first discussed and then introduced into the other two models. An existing database of slender and non-slender beams tested in laboratory by other researchers is revised and improved. Finally, all the considered models are applied to the selected specimens and a comparison is drawn between the shear strength resulting from the considered models and the shear strength resulting from the laboratory tests. The effects of corrosion on some important parameters of the ultimate shear response of the reinforced concrete beams are also discussed.

Keywords

Acknowledgement

This study was supported by: the University of Catania within the research project "DU.SO.CA.P. Durabilita e SOstenibilita delle strutture in Cemento Armato e Precompresso", the research program "PIAno di inCEntivi per la RIcerca di Ateneo 2020/2022 (PIA.CE.RI.) -Starting Grant-Linea di intervento 3", the research project "Definizione e validazione di procedure di progetto di interventi di adeguamento sismico di edifici in c.a mediante pareti oscillanti", and the research project "PIAno di inCEntivi per la RIcerca di Ateneo 2020/2022 (PIA.CE.RI.) - Linea di intervento 2". Special thanks are due to the Italian Superior Council of Public Works (CC.SS.LL.PP.), and the Network of University Laboratories of Seismic Engineering (RELUIS). The results were achieved in the national technical agreement for implementing the agreement pursuant to art. 15 law 7 Aug. 1990, No. 241 between the Superior Council of Public Works and RELUIS.

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