Dual vibration observation system for structural health monitoring

Kenji Kanazawa, Nobuki Morikiyo, Haruyuki Kitamura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A dual vibration observation system (DVOSYS) is proposed for structural health monitoring study, which can amass both strong earthquake response and continual long-term ambient vibration. The advantage of the DVOSYS is to obtain complete sets of an earthquake record and the ambient vibration records before and after the earthquake, and these records are useful to establish vibration-based damage detection. The authors have been monitoring a baseisolated building since August 16, 2004. Recent results show that the natural frequencies have diurnal fluctuations where the first and second natural frequencies are varying mutually independent, and that a far field earthquake induces rigid-body mode of the base-isolated building with the surrounding ground, which are caused by long period ground motion owing to the deep underground structure of Kanto Basin. These results can be introduced only by the long-term vibration monitoring function of the DVOSYS.

Original languageEnglish
Title of host publication8th US National Conference on Earthquake Engineering 2006
Pages4955-4964
Number of pages10
Publication statusPublished - 1 Dec 2006
Event8th US National Conference on Earthquake Engineering 2006 - San Francisco, CA, United States
Duration: 18 Apr 200622 Apr 2006

Publication series

Name8th US National Conference on Earthquake Engineering 2006
Volume9

Conference

Conference8th US National Conference on Earthquake Engineering 2006
CountryUnited States
CitySan Francisco, CA
Period18/04/0622/04/06

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Kanazawa, K., Morikiyo, N., & Kitamura, H. (2006). Dual vibration observation system for structural health monitoring. In 8th US National Conference on Earthquake Engineering 2006 (pp. 4955-4964). (8th US National Conference on Earthquake Engineering 2006; Vol. 9).