Abstract
Since railway structures wereconstructed precedently compared with other infrastructures, there are a lot ofproblems in seismic diagnosis. In particular, it is verydifficult to diagnose the substructures embedded in groundwith visual methods which need excavation. The authors, therefore, have developed a passive inspection methodtaking advantage of secondaryAE (AcousticEmission) induced bytrains in servicing. In this study, the applicabilityof the proposed method is verified byapplying the secondaryAE technique to the piers and columns of railwaystructures, which were damaged during past earthquakes. Moreover, the consistency among the secondary AE technique and other nondestructive inspection methods, e. g. the impact vibration test and the seismic tomography, is well grasped.
