- 著者
-
藤堂 正喜
羽鳥 敏明
千葉 脩
高橋 克也
武村 雅之
田中 英朗
- 出版者
- 日本建築学会
- 雑誌
- 日本建築学会構造系論文集 (ISSN:13404202)
- 巻号頁・発行日
- vol.60, no.475, pp.45-54, 1995
- 被引用文献数
-
6
4
Using seismic records observed in 4 borehole arrays, characteristics of vertical seismic motions in sedimentary layers are investigated. The results are as follows. 1) P-waves having intensive effect to vertical component are propagating within sedimentary layers even after the S-wave onset time (S-wave part). 2) Frequency dependent Q-values for P-waves (Qp) in Tertiary sediment layers obtained from the optimal analyses to spectral ratios have the tendency to be identical with Q-values for S-waves (Qs) with the same wavelength. 3) Observed vertical motions in upper ground can be simulated by the multiple reflection theory of P-waves based on the optimized velocities and Q-values.