COUPLING LIMIT STATES OF CORROSION INITIATION AND CORROSION INDUCED CRACK OPENING – SENSITIVITY ANALYSIS OF MODEL PARAMETERS

Author(s):Miguel Ferreira, Edgar Bohner, Olli Saarela
Paper category: Proceedings
Book title: proceedings of the International RILEM Conference on Materials, Systems and Structures in Civil Engineering Conference segment on Service Life of Cement-Based Materials and Structures
Editor(s): Miguel Azenha, Ivan Gabrijel, Dirk Schlicke, Terje Kanstad and Ole Mejlhede Jensen
ISBN:978-2-35158-170-4
e-ISBN: 978-2-35158-173-5
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 182-193
Total Pages: 10
Language : English

Abstract: A normal approach to the Service Life Design of reinforced concrete will typically consider
the limit state of corrosion initiation as the defining durability limit state. Rarely are other
limit state considered such as corrosion propagation or corrosion induced cracking and
spalling due to the greater uncertainties in the models that describe the deterioration
mechanisms. Most models capture the process of the initial phase of degradation. These
models disregard the actual damage, i.e. the corrosion of the reinforcing steel. As a result, the
Service Life Design established to date only considers the end of the initiation phase of the
degradation process, or, in other words, the onset of damage (time of depassivation or onset of
corrosion) as a critical limit state. Corrosion and its consequences are not considered, which
may lead to a substantially shorter estimated service life of the structures. Comprehensive
investigations were recently undertaken on the depassivation of steel reinforcement and on
crack formation in concrete which have resulted in an analytical prediction model for
corrosion-induced cracking occurring in the surface zones of structural components. This
paper presents a sensitivity study of the main model parameters for the corrosion induced
cracking when coupled to the chloride induced corrosion initiation model.

Online publication : 2016
Publication type : full_text
Public price (Euros) : 0.00