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A risk-cost optimized maintenance strategy for corrosion-affected concrete structures

A risk-cost optimized maintenance strategy for corrosion-affected concrete structures

Li, Chun-Qing, Mackie, Robert Ian and Lawanwisut, Wimon (2007) A risk-cost optimized maintenance strategy for corrosion-affected concrete structures. Computer-Aided Civil and Infrastructure Engineering, 22 (5). pp. 335-346. ISSN 1093-9687 (doi:

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Corrosion of reinforcing steel in concrete is
the dominant cause for premature failures of reinforced
concrete structures located in chloride-laden environments.
It is also observed that some severely deteriorated
concrete structures survive for many years without maintenance.This raises the question of why and how to maintain corrosion-affected concrete structures, in particular in the climate of an increasing scarcity of resources. The present article attempts to formulate a maintenance strategy based on risk-cost optimization of a structure during its whole service life. A time-dependent reliability method is employed to determine the probability of exceeding a limit state at each phase of the service life. To facilitate practical application of the formulated maintenance strategy,an algorithm is developed and programmed in a userfriendly manner with a worked example. A merit of the proposed maintenance strategy is that models used in risk assessment for corrosion-affected concrete structures are related to some of the design criteria used by practitioners.
It is found in the article that there exists an optimal
number of maintenances for cracking and delamination
that returns the minimum total cost for the structure in
its whole life. The maintenance strategy presented in the
article can help structural engineers, operators, and asset
managers develop a cost-effective management scheme
for corrosion-affected concrete structures

Item Type: Article
Uncontrolled Keywords: maintenance strategy, reinforced concrete structures, reinforcing steel, risk-cost optimization
Subjects: T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
Pre-2014 Departments: School of Engineering
School of Engineering > Department of Civil Engineering
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Last Modified: 29 Jan 2020 10:13

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