Stochastic evaluation of the damage length in RC beams submitted to corrosion of reinforcing steel

Authors: Sudret, B.¹; Defaux, G.¹; Pendola, M.²

Source: Civil Engineering and Environmental Systems, Volume 24, Number 2, June 2007 , pp. 165-178(14)

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Abstract:

The influence of spatial variability of parameters appearing in a model of concrete carbonation (and resulting rebars corrosion) is studied. For this purpose, random fields are introduced in order to represent the input parameters of the model. The concept of damage length is defined as the portion of a beam structure for which a durability failure criterion is attained. Analytical derivations inspired from time-variant reliability methods lead to tractable formulae for the mean and standard deviation of the damage length. Results are validated using Monte Carlo simulation (MLS) of both the input random fields (after proper discretization) and the resulting damage length. The histogram of the damage length, which is obtained as a byproduct of the MCS, is finally commented.

Keywords: Extent of damage; Ageing indicator; Rebars corrosion; Time-variant reliability; PHI2 method; Space-variant reliability

Document Type: Research article

DOI: http://dx.doi.org/10.1080/10286600601159305

Affiliations: 1: Electricité de France, R&D Division, France 2: Phimeca Engineering S.A., France

Publication date: 2007-06-01

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