トルコ・コジャエリ地震における強震観測点および被災地の地下構造と強震動特性

概要

論文の詳細を見る
Array observations of microtremors and aftershocks were carried out near permanent strong motion observation sites and damaged areas after the Kocaeli, Turkey earthquake of August 17, 1999 for determining S-wave velocity structures and understanding the relative site effects. Most strong motion sites near the fault are classified to stiff and/or very hard soil. A large and long duration of strong motion records at ATS, near Avcilar, west of Istanbul are closely related to the low velocity of surface layers. The strong ground motion as well as the S-wave velocity structure at severely damaged area in Avcilar during the mainshock is estimated to be similar to that at ATS. The strong motion site, SKR is located on very hard soil, while thick and soft sediments covers downtown Adapazari including the microtremors observation site ADC. It is plausible that strong ground motions during the mainshock in the damaged area including ADC were significantly different from those of SKR. A large difference of strong motions between a hillside and Izmit Bay area in and around Golcuk is also found from the comparison of aftershock records.
一般社団法人日本建築学会の論文
2001-03-20