@ ŒfÚŽGŽi˜ajF “ú–{’nkHŠwƒVƒ“ƒ|ƒWƒEƒ€˜_•¶W VolF 9-3Šª ”NF 1994”N •ÅF E.85-E.90•Å ’˜ŽÒi˜ajF - ƒ^ƒCƒgƒ‹i˜ajF - ´˜^i˜ajF
- ƒL[ƒ[ƒhi˜ajF - ŒfÚŽGŽi‰pjF PROCEEDINGS OF THE JAPAN EARTHQUAKE ENGINEERING SYMPOSIUM ’˜ŽÒi‰pjF Saburoh MIDORIKAWA, Masashi MATSUOKA, Koichi SAKUGAWA ƒ^ƒCƒgƒ‹i‰pjF SITE EFFECTS ON STRONG-MOTION RECORDS OBSERVED DURING THE 1987 CHIBA-KEN-TOHO-OKI, JAPAN EARTHQUAKE ´˜^i‰pjF
Site effects on strong ground motion are discussed using records observed at 173 sites during the 1987 Chiba-ken-toho-oki, Japan earthquake. Attenuation relationships for the records are developed to eliminate the path effect and to derive the site effect on the records. Correlations of the site effect with simple site parameters are examined. The results indicate that 1) the site effect is small at periods shorter than 0.2 second and significant at periods longer than 0.5 second, 2) the geomorphological classification is a more appropriate site classification scheme than the soil classification, and 3) the average shear wave velocity could be the common site parameter for evaluating the site effect in various regions. ƒL[ƒ[ƒhi‰pjF - ‹LŽ–‹æ•ªF - ‹æ•ª @@@ˆÏˆõ‰ï˜_•¶W