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Lifetime oriented multi-objective cost optimization of structural maintenance considering the safety of the system

Piryonesi, S. M ; Sharif University of Technology | 2015

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  1. Type of Document: Article
  2. Publisher: Canadian Society for Civil Engineering , 2015
  3. Abstract:
  4. Nowadays the maintenance of the deteriorating structures is an important subject in industry and research. Due to the limitations of the budget and time, the optimization algorithms have been used widely to determine the best maintenance strategies to provide the more economical structures. On the other side, the Less life-cycle cost will result in less safe structures. As safety is a vital criterion for the users of a structural system, there is a severe need to make a suitable trade-off between cost and safety. So, the optimal maintenance strategies are those that fulfill both the safety and the economical requirements. In this paper, the reliability of the structural system is selected to represent the safety. Also life-cycle cost (1CC) of the structure is used to represent the economical aspect of the maintenance strategy. A weighted non-linear programming is applied to extract the optimal Pareto-front solutions. The objective is to find the optimal time of intervention. Finally to show the effectiveness of the model an example is presented. A sensitivity analysis of the discount rate is also presented to emphasize the importance of the time value of money
  5. Keywords:
  6. Life-cycle cost (LCC) ; Safety ; Weighted non-linear programming ; Accident prevention ; Algorithms ; Budget control ; Costs ; Economic and social effects ; Life cycle ; Maintenance ; Multiobjective optimization ; Nonlinear programming ; Optimization ; Safety engineering ; Sensitivity analysis ; Deteriorating structures ; Discount rates ; Life cycle costs (LCC) ; Maintenance strategies ; Optimal maintenance ; Optimization algorithms ; Structural maintenance ; Time value of money ; Structural optimization
  7. Source: Proceedings, Annual Conference - Canadian Society for Civil Engineering, 28 May 2014 through 31 May 2014 ; Volume 1 , May , 2015 , Pages 656-663 ; 9781510818781 (ISBN)