@ ŒfÚŽGŽi˜ajF “ú–{’nkHŠwƒVƒ“ƒ|ƒWƒEƒ€˜_•¶W VolF 9-1Šª ”NF 1994”N •ÅF 625-630•Å ’˜ŽÒi˜ajF ‘å–ì@WC@‚‹´@Ž–ç ƒ^ƒCƒgƒ‹i˜ajF •Ä‘ƒJƒŠƒtƒHƒ‹ƒjƒAB‹­kŠÏ‘ª‹L˜^‚ð—p‚¢‚½’nk“®ƒXƒyƒNƒgƒ‹•]‰¿ ´˜^i˜ajF
- ƒL[ƒ[ƒhi˜ajF - ŒfÚŽGŽi‰pjF PROCEEDINGS OF THE JAPAN EARTHQUAKE ENGINEERING SYMPOSIUM ’˜ŽÒi‰pjF Susumu OHONO, Katsuya TAKAHASHI ƒ^ƒCƒgƒ‹i‰pjF EVALUATION OF STRONG-MOTION ATTENUATION RELATION USING NEAR-SOURCE DATA IN CALIFORNIA ´˜^i‰pjF
For 496 horizontal components of 17 major earthquakes occurred in California, from 1940 to 1992, magnitudes from 5.0 to 7.5, a new attenuation relation of 5%-damping response spectrum is estimated by Joyner and Boore (1993) maximum likelihood 2-step regression analysis. the estimated attenuation relation for maximum acceleration (A¡) is: logA¡ = 0.318Mw -logXeq- 0.00164Xeq+1.597, where Mw is moment magnitude. Xeq is Equivalent Hypocentral Distance: a distance between site and virtual point source that radiates the same energy as does a finite-sized fault (Ohno et al., 1993). ƒL[ƒ[ƒhi‰pjF - ‹LŽ–‹æ•ªF - ‹æ•ª @@@ˆÏˆõ‰ï˜_•¶W