%0 Journal Article %T Optimizing the life cycle cost of bridges by considering the reliability of bridges (Case study of bridges from Sari to Mahmudabad) %J Amirkabir Journal of Civil Engineering %I Amirkabir University of Technology %Z 2588-297X %A Taheri Amiri, Mohammad Javad %A Hematian, Milad %A Roshanghalb, Shervin %D 2022 %\ 12/22/2022 %V 54 %N 10 %P 3723-3742 %! Optimizing the life cycle cost of bridges by considering the reliability of bridges (Case study of bridges from Sari to Mahmudabad) %K Bridge %K Repair and maintenance %K Life Cycle Cost %K Reliability %K Multi objective particle swarm optimization %R 10.22060/ceej.2022.17603.6622 %X Maintenances are necessary to ensure the safety and serviceability of existing bridges. With the increasing number of existing bridges, maintenance cost a large proportion of financial fund and have a significant impact on the environment. Bridges like any other structure and perhaps more than most of them are affected by the environment. Because they belong to sensitive and high costly structures, failure to maintain them will have devastating effects. Bridges are needed continuous maintenance in order to service properly during their life cycle. Therefore, in this study, the issue of maintenance and repair of urban bridges in Mazandaran province has been studied with regard to the life cycle cost and reliability of bridges. To do this end, a mathematical programming model which includes minimizing maintenance and user costs as well as maximizing system reliability. In order to solve the proposed model, a multi-objective particle swarm optimization algorithm is developed. Also, a sensitive analysis is done on the failure rate. Results show that increases in this parameter cause increasing cost and decreasing reliability. This indicates that the proposed algorithm is working properly and the results of this research can be trusted. %U https://ceej.aut.ac.ir/article_4789_a81fe567eedcb11893ddbb89d2d79b80.pdf