| Presented are the results of an investibation in which collected strong-motion records on the Hokkaido Toho-oki Earthquake were digitized and wave analyses including power spectram，acceleration response spectrum and so on were performed．On roads，there was little damage to bridges except.bridges with poor substructure，but much damage to earth works in cuts and embankments．We consider that from all the records of the eathquake that the Toho-oki Earthquake.did not depend on the natural period of the ground．Further analysis and investigation of records of analogue strong motion seismographs are necessary as well． |
