Risk-based optimum repair planning of corroded reinforced concrete structures

Article


Nepal, J. and Chen, Hua-Peng 2015. Risk-based optimum repair planning of corroded reinforced concrete structures. Structural Monitoring and Maintenance: An International Journal. 2 (2), pp. 133-143.
AuthorsNepal, J. and Chen, Hua-Peng
Abstract

Civil engineering infrastructure is aging and requires cost-effective maintenance strategies to enable infrastructure systems operate reliably and sustainably. This paper presents an approach for determining risk-cost balanced repair strategy of corrosion damaged reinforced concrete structures with consideration of uncertainty in structural resistance deterioration. On the basis of analytical models of cover concrete cracking evolution and bond strength degradation due to reinforcement corrosion, the effect of reinforcement corrosion on residual load carrying capacity of corroded reinforced concrete structures is investigated. A stochastic deterioration model based on gamma process is adopted to evaluate the probability of failure of structural bearing capacity over the lifetime. Optimal repair planning and maintenance strategies during the service life are determined by balancing the cost for maintenance and the risk of structural failure. The method proposed in this study is then demonstrated by numerical investigations for a concrete structure subjected to reinforcement corrosion. The obtained results show that the proposed method can provide a risk cost optimised repair schedule during the service life of corroded concrete structures.

JournalStructural Monitoring and Maintenance: An International Journal
Journal citation2 (2), pp. 133-143
ISSN2288-6605
Year2015
PublisherTechno-Press
Digital Object Identifier (DOI)doi:10.12989/smm.2015.2.2.133
Web address (URL)https://doi.org/10.12989/smm.2015.2.2.133
Publication dates
PrintJun 2015
Publication process dates
Deposited08 Oct 2018
Accepted07 Mar 2015
Accepted07 Mar 2015
Copyright information© 2015 Techno-Press
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https://repository.uel.ac.uk/item/855xq

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