Modelling R. C. structures in presence of reinforcement corrosion

Author(s): G. Bertagnoli, G. Mancini, F. Tondolo
Paper category: Workshop
Book title: International RILEM Workshop on Integral Service Life Modelling of Concrete Structures
Editor(s): R.M. Ferreira, J. Gulikers, C. Andrade
Print ISBN: 978-2-35158-058-5
e-ISBN: 978-2-35158-090-5
Publisher: RILEM Publications SARL
Pages: 247 - 254
Total Pages: 8
Language: English

Abstract: 
Rebar corrosion in concrete structures is up till now one the principal causes of deterioration in reinforced concrete. The aim of this work is to deal with uniform corrosion along concrete elements caused by carbonation effect. The proposed mechanical model takes into account the reinforcement section area reduction, the effect of the degradation in compressed concrete due to cracking and spalling because of corrosion products and, last but not least, bond deterioration. Bond loss generally makes the elements more deformable and causes a brittle behaviour due to the partial loss of composite action. It gives rise to an increase in curvature and then a deformation increment in compressed concrete in order to ensure the equilibrium of forces and the compatibility of deformations. An arc tied action arises in this way in small portions of the structure subjected to a bond request not available due to corrosion. The model proposed is compared with experimental results: concrete element in bending and in combined compression-bending are analyzed. From the results it appears that, in presence of corrosion, there is the need to evaluate the residual safety of the structure taking into account all the effects of degradation.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00