抄録
A damage identification method for a structural health monitoring of concrete structures based on the anti-resonance frequency was investigated. The static loading tests of the two RC beam specimens were conducted to measure the resonance and anti-resonance frequency changes by the flexural cracks. The forced vibration tests by using a white noise wave were carried out when the vertical loads were subjected at the 1/2 or 1/4 of the span, respectively. As the experimental results, the distribution of the anti-resonance frequency of the beam specimen was changed to asymmetric when the vertical load was subjected at the 1/4 of the span. It was indicated that the damage location of a concrete beam could be identified based on the anti-resonance frequency change.
