日本地震工学会論文集｜Vol.12 (2012) No. 4｜経験的サイト増幅・位相特性を考慮した2011年東北地方太平洋沖地震における那珂川水管橋での地震動の評価 [PDF]

frequency | Once | scope | Page | email | language | Japanese| | translation | During the 2011 off the Pacific coast of Tohoku Earthquake, Naka-River Aqueduct, Ibaraki Prefecture, Japan,suffered significant damage including pipe dropout in expansion joints. In this study, to estimate strong groundmotions at the damage site with high accuracy, aftershock observations with a dense array were conducted at thesite. Based on the observation records, difference of site effects between the landside area and the riverside areawas indicated. The estimated seismic waveforms at permanent strong motion stations with the site-effectsubstitution method are very consistent with the observed ones, indicating the validity of the method. Finally, themethod was used to estimate strong ground motions at the damage site.