A comparative study of time-based maintenance and condition-based maintenance for optimal choice of maintenance policy

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Cost-effective maintenance of infrastructure systems within an acceptable level of safety and performance is the major concern of managing agencies. Recent maintenance approaches have offered two distinct maintenance policies: time-based maintenance (TBM) and condition-based maintenance (CBM). This paper compares the two policies under different cost environments for stochastically deteriorating infrastructures. The performance of TBM and CBM is evaluated from the viewpoint of condition transition and life cycle cost. We found the optimal maintenance solutions for TBM and CBM using dynamic programming and performed a simulation study. The simulation study showed that TBM causes some unexpected deterioration that leads to high cost, while CBM maintains a certain level of condition steadily under consistent inspection, which enables steady spending at the management level. The life cycle cost under CBM is relatively symmetric and has a more concentrated distribution than TBM, which has a large number of outliers from unexpected deteriorations. Finally, we evaluated the life cycle cost with a change in the inspection-repair cost ratio to find the most appropriate cost environment for each maintenance policy. While CBM needs periodic inspections, it still has more advantages than TBM when the inspection cost is relatively low.
Publisher
TAYLOR & FRANCIS LTD
Issue Date
2016-09
Language
English
Article Type
Article
Keywords

LIFE-CYCLE MAINTENANCE; ORIENTED MULTIOBJECTIVE OPTIMIZATION; PERIODIC PREVENTIVE MAINTENANCE; DETERIORATING STRUCTURES; BRIDGE MAINTENANCE; COST; SYSTEMS

Citation

STRUCTURE AND INFRASTRUCTURE ENGINEERING, v.12, no.12, pp.1525 - 1536

ISSN
1573-2479
DOI
10.1080/15732479.2016.1149871
URI
http://hdl.handle.net/10203/213828
Appears in Collection
CE-Journal Papers(저널논문)
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