APPLICATION OF STRUCTURAL HEALTH MONITORING TECHNIQUE TO AN AGED ARCH DAM BY MEANS OF LONG-TERM CONTINUOUS OBSERVATION OF AMBIENT VIBRATION/SEISMIC MOTION - DETECTION OF PREDOMINANT FREQUENCY VARIATION ALONG TIME: VARIATION DURING AMBIENT VIBRATION/ SEISMIC MOTION

Abstract

Structural health monitoring technique was applied to an aged arch dam, where long-term continuous observation of ambient vibration/seismic motion was performed over a span of three years and a half and where the predominant frequency variation along time was detected. As the result, the following was made clear, that is, the structural health of an aged arch dam can be evaluated through the monitoring of the predominant frequency variation which is detected as the result of the long-term continuous observation of ambient vibration/seismic motion.