Vibration-based Structural Health Monitoring of Caisson-type Breakwaters Damaged on Rubble Mound

J. Ocean Eng. Technol. 2010;24(1):90-98.

Lee So-Young,Kim Jeong-Tae,Kim Heon-Tae

Department of Ocean Engineering Pukyong National University,Department of Ocean Engineering Pukyong National University,Department of Ocean Engineering Pukyong National University

사석마운드가 손상된 케이슨식 방파제의 진동기반 구조건전성 모니터링

이소영,김정태,김헌태

부경대학교 해양공학과,부경대학교 해양공학과,부경대학교 해양공학과

Keywords: Caisson, Caisson-type breakwater, Structural health monitoring, Vibration-based, Rubble mound, Wave induced excitation

핵심용어: 케이슨, 케이슨식 방파제, 구조건전성 모니터링, 진동기반, 사석 마운드, 파랑가진

Abstract

In this paper, vibration-based structural health monitoring methods that are suitable for caisson-type structures are examined by an experimental evaluation. To achieve the objective, four approaches are implemented. First, vibration-based structural health monitoring methods are selected to monitor the structural condition of caisson-type breakwaters. Second, a lab-scaled caisson structure is constructed to verify the selected monitoring methods. Third, the vibration characteristics are numerically analyzed using an FE model due to the change in the rubble mound condition. Finally, experimental vibration tests of the lab-scaled caisson structure are performed to monitor the vibration responses due to changes in rubble mound conditions and the performances of the selected methods are examined from the monitoring results.