Experimental Modal Analysis for Damage Identification in Foundation-Structure Interface of Caisson-type Breakwater

doi:2012.26.1.34

J. Ocean Eng. Technol. > Volume 26(1); 2012 > Article

J. Ocean Eng. Technol. 2012;26(1):34-40.
DOI: https://doi.org/10.5574/KSOE.2012.26.1.034

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

Dept. of Ocean Engineering Pukyong National University,Ocean Space Inc.,Dept. of Ocean Engineering Pukyong National University

케이슨식 방파제 지반-구조 경계부 손상식별을 위한 실험적 모드분석

이소영,이소라,김정태

부경대학교 해양공학과,(주)오션스페이스,부경대학교 해양공학과

Keywords: Caisson, Breakwater, Foundation-structure interface, Scouring, Modal analysis, Dynamic behavior

핵심용어: 케이슨, 방파제, 지반-구조 경계부, 세굴, 모드 해석, 동적 거동

Abstract

This paper presents an experimental modal analysis of a caisson-type breakwater to produce basic information for the structural health assessment of a caisson structure. To achieve the objective, the following approaches are implemented. First, modal analysis methods are selected to examine the modal characteristics of a caisson structure. Second, experimental modal analyses are performed using finite element analyses and lab-scale model tests. Third, damage scenarios that include several damage levels in a foundation-structure interface are designed. Finally, the effects of damage on the modal characteristics are analyzed for the purpose of utilizing them for damage identification.