Abstract
Bridge pier joints occasionally become unstable due to deterioration and after the great earthquake disaster. The purpose of this paper is to report on a measurement of vibration characteristics for the bridge using piezoelectric cable. The cable winds up the piezoelectric film in the surrounding electric wire. It also generate high voltage for amplifiers when the cyclic loading is applied, which does not require instruments because it has a piezoelectric. The output voltage was generated in proportion to the fluctuation of the vibration.
