A STUDY ON DAMAGE DETECTION OF THE STEEL TRUSS BRIDGE BASED ON THE SPECTRAL ELEMENT METHOD USING HIGH FREQUENCY EXCITATION

Abstract

 A damage identification technique using high-frequency excitation based on the spectral element method is presented. Considering a drawback of the low-frequency-based damage identification technique, this study proposes a damage identification technique using kHz-level frequency that can detect smaller damage efficiently. It is assumed that the structure is excited with a harmonic force by a piezoelectric actuator and that the method focuses on the difference of the frequency response function by damage. Moreover, it uses the spectral element method that is suitable for analyzing structural responses at high frequency domain. The effectiveness of the proposed method was verified by numerical simulations for the steel truss bridge.