Dynamic Response Analysis of Caisson Structure by Acceleration Measurement

J. Ocean Eng. Technol. 2009;23(1):114-121.

Lee So-Young,Kim Jeong-Tae,Kim Heon-Tae,Park Woo-Sun

Department of Ocean Engineering Pukyong National University,Department of Ocean Engineering Pukyong National University,Department of Ocean Engineering Pukyong National University,Coastal Engineering and Ocean Energy Research Dept. KORDI

가속도 계측을 통한 항만시설용 케이슨 구조체의 동적응답 분석

이소영,김정태,김헌태,박우선

부경대학교 해양공학과,부경대학교 해양공학과,부경대학교 해양공학과,한국해양연구원 연안개발.에너지연구부

Keywords: Dynamic response, Caisson, Harbor structure, Acceleration, Correlation coefficient, Frequency response function, Modal analysis

핵심용어: 동적응답, 케이슨, 항만구조물, 가속도, 상관계수, 주파수응답함수, 모드해석

Abstract

In this study, acceleration responses of caisson structures under various environmental conditions are experimentally examined as a basic study to develop the health assessment technique for harbor structures. To achieve the objective, three approaches are implemented. Firstly, a target caisson structure is selected and its small-scaled caisson is constructed in the laboratory. Secondly, a finite element model of the caisson is generated to identify dynamic responses of the baseline structure. Thirdly, experimental tests are performed on the caisson model to examine dynamic responses under various boundary conditions and impact locations. Four different boundary conditions, 'standing on concrete floor', 'standing on styrofoam block', 'standing on sand-mat' and 'hanging by crane', are considered and correlation coefficients of frequency response functions between four states are analyzed.