THE OPTIMAL SCRAPPING AND MAINTENANCE MODEL OF INFRASTRUCTURE CONSIDERING DETERIORATION PROCESS

Abstract

 In this study, the authors propose a methodology for designing optimal scrapping and maintenance policies for infrastructures that are to be demolished due to the demand decline or the deterioration progression. Infrastructures are durable, and can be used continuously as long as there are no problems in safety or economic performance. This study is focused on the three scrapping and maintenance policies: (1) to demolish infrastructures immediately, (2) to maintain them under the minimum maintenance, and (3) to repair them constantly. Then, the authors propose optimal scrapping and maintenance models for designing asset management policies considering the demand and deterioration of infrastructures. In addition, the effectiveness of the proposed optimal scrapping and maintenance models is investigated through a case study.