The needs for consistent maintenance for highway bridge has been increased in nowadays. This study is to investigate fundamental database about in-depth inspection for publishing the repair and strengthening methodology. It is because the maintenance budget should be used effectively for optimal maintenance of infrastructures. In order to investigate the maintenance history of highway bridges, the database of in-depth inspection from 1996 to 2012 was analyzed. For the superstructure type, PSC box girder bridge which was the most common among the concrete bridges in the inspection database was investigated.

• 신상민(강원대학교 토목건설공학과 석사과정) | Shin, Sang Min
• 주민관(강원대학교 토목공학과 연구교수, 공학박사) | Ju, Min Kwan
• 박창호(한국도로공사 건설환경연구실, 수석연구원) | Park, Chang Ho
• 김지원(㈜토탈페이브시스템, 대표이사) | Kim, Ji Won
• 박철우(강원대학교 토목공학과 부교수, 공학박사) | Park, Cheol Woo