Damage Detection of Building Structures Using Ambient Vibration Measuresent

자연진동을 이용한 건물의 건전도 평가

  • 김상윤 (한양대학교 건축환경공학과) ;
  • 권대홍 (한양대학교 건축환경공학과) ;
  • 유석형 (한양대학교) ;
  • 노삼영 (한양대학교 건축학부) ;
  • 신성우 (한양대학교 건축학부, 친환경건축연구센터)
  • Published : 2007.08.31

Abstract

Numerous non-destructive tests(NDT) to assess the safety of real structures have been developed. System identification(SI) techniques using dynamic responses and behaviors of structural systems become an outstanding issue of researchers. However the conventional SI techniques are identified to be non-practical to the complex and tall buildings, due to limitation of the availability of an accurate data that is magnitude or location of external loads. In most SI approaches, the information on input loading and output responses must be known. In many cases, measuring the input information may take most of the resources, and it is very difficult to accurately measure the input information during actual vibrations of practical importance, e.g., earthquakes, winds, micro seismic tremors, and mechanical vibration. However, the desirability and application potential of SI to real structures could be highly improved if an algorithm is available that can estimate structural parameters based on the response data alone without the input information. Thus a technique to estimate structural properties of building without input measurement data and using limited response is essential in structural health monitoring. In this study, shaking table tests on three-story plane frame steel structures were performed. Out-put only model analysis on the measured data was performed, and the dynamic properties were inverse analyzed using least square method in time domain. In results damage detection was performed in each member level, which was performed at story level in conventional SI techniques of frequency domain.

Acknowledgement

Supported by : 한국건설교통기술평가원, 과학기술부

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