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Probabilistic model for time to cover cracking due to corrosion

journal contribution
posted on 07.02.2022, 05:08 authored by Hassan BajiHassan Baji, Wei Yang, Chun-Qing Li, Wenhai Shi
The time to cover cracking is widely used as a service life indicator in the assessment of deterioration of corrosion-affected reinforced concrete structures. This paper presents a general probabilistic procedure for prediction of time to cover cracking. Within this procedure, the response surface method (RSM) is employed to calibrate a new model for calculating of radial displacement required for cover cracking based on the results obtained from the finite element (FE) analysis. By taking advantage of the central limit theorem (CLT), simple but accurate probabilistic models for prediction of time to cover cracking that only rely on the knowledge of first and second moments of basic random variables are derived. Rigorous simulation analysis has proved the accuracy of these models. It is shown in the paper that using this probabilistic procedure, factors affecting randomness of time to cover cracking can be easily identified. It is also shown that the time to cover cracking is highly variable with the concrete cover, tensile strength of concrete, corrosion current density, and the model error as the most influential factors on its randomness.

Funding

Category 3 - Industry and Other Research Income

History

Volume

21

Issue

4

Start Page

1408

End Page

1424

Number of Pages

17

eISSN

1751-7648

ISSN

1464-4177

Publisher

Wiley

Language

en

Peer Reviewed

Yes

Open Access

No

Acceptance Date

16/12/2019

External Author Affiliations

The University of Melbourne; RMIT University

Era Eligible

Yes

Journal

Structural Concrete