An Energy-Dissipation-Ratio Based Structural Health Monitoring System

에너지소산률을 이용한 구조물의 건전도 모니터링에 관한 연구

  • 허광희 (건양대학교, 토목공학과) ;
  • 신형철 (충남대학교, 토목공학과) ;
  • 신재철 (충남대학교, 토목공학과)
  • Received : 2003.08.01
  • Published : 2004.01.31

Abstract

This research develops a technique which uses energy dissipation ratio in order to monitor the structural health on real time basis. For real-time monitoring, we employ the NExT and the ERA which enable us to obtain real-time data. Energy dissipation ratio is calculated from those data only with the damping and natural frequency of the structure, and from the calculated values we develop an algorithm (Energy dissipation method) which decides the damage degree of structure. The Energy dissipation method developed in this research is proved to be valid by comparison with other methods like the eigenparameter method and the MAC. Especially this method enables us to save measuring time and data which are the most important in real-time monitoring, and its use of the ambient vibration also makes it easy to monitor the whole structure and its damage points.

Acknowledgement

Supported by : 한국학술진흥재단