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A theoretical framework for risk–cost-optimized maintenance strategy for structures

journal contribution
posted on 19.03.2020, 00:00 by W Yang, Hassan Baji, C-Q Li
This paper presents a theoretical framework for developing a risk–cost optimised maintenance strategy for structures during their whole service life. A time-dependent reliability method is employed to determine the probability of structural failure and a generic form of stochastic model is developed for structural responses. To facilitate practical application of the proposed framework, a general algorithm is developed and programmed in a user-friendly manner. The merit of the proposed framework is that, in predicting when, where and what maintenance is required for the structure, all structural components and multi-failure modes are considered. It is found in the paper that, to ensure the safe and serviceable operation of the structure as a whole, some components need maintenance multiple times for different failure modes, whilst other components need “do nothing”. It is also found that ignorance of correlation amongst structural components and failure modes would underestimate the risk of structural failures in longer term and that the components with higher cost of structural failures require more maintenance actions. The paper concludes that the proposed framework can equip structural engineers, operators and asset managers with a tool for developing a risk–cost optimal maintenance strategy for structures under their management. © 2019, Iran University of Science and Technology.

Funding

Category 1 - Australian Competitive Grants (this includes ARC, NHMRC)

History

Volume

18

Issue

3

Start Page

261

End Page

278

Number of Pages

18

eISSN

2383-3874

ISSN

1735-0522

Publisher

Iran University of Science and Technology

Peer Reviewed

Yes

Open Access

No

Acceptance Date

23/09/2019

External Author Affiliations

The University of Melbourne; RMIT University

Era Eligible

Yes

Journal

International Journal of Civil Engineering