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調和振動荷重による地盤構造と各層の弾性定数の推定法 A Method of Estimation of Thicknes and Elastic Moduli of Soils by Harmonic Loads on Ground Surface 齊藤, 将司 サイトウ, ショウジ Saitoh, Shouji Saitou, Shouji 齊藤 サイトウ Saitoh Saitou 将司 ショウジ Shouji Shouji Harada, Takanori 原田, 隆典 ハラダ, タカノリ Harada 原田 ハラダ Takanori 隆典 タカノリ 森, 源次 モリ, ゲンジ Mori, Genji 森 モリ Mori 源次 ゲンジ Genji Wang, Hongze 王, 宏沢 オウ, コウタク Wang 王 オウ Hongze 宏沢 コウタク Nakamura, Masaki 中村, 真貴 ナカムラ, マサキ Nakamura 中村 ナカムラ Masaki 真貴 マサキ 齊藤, 将司 サイトウ, ショウジ Saitoh, Shouji Saitou, Shouji 齊藤 サイトウ Saitoh Saitou 将司 ショウジ Shouji Shouji 森, 源次 モリ, ゲンジ Mori, Genji 森 モリ Mori 源次 ゲンジ Genji estimation of lleredsoil deposit, vertical harmonic loading, Wave propagation, phase velocity, dynamic response of soil deposit, non destructive tasting This paper presents numerical examples demonstrate a capability of method of estimating the elastic properties of the soils and their variation with depth using the characteristics of P-SV wave fields caused in the surface of an elastic multi-layered half space by the vertical harmonic point load applied also on the soil surface. In this numerical examples, the three cases of ground model are used the models of typical shallow surface ground: case 1 is a nomal soil deposit where soil properties increase with their depth from the ground surface while case 2 and 3 are the irregular soil deposits. In case2, the second layer is a low velocity layer and in case3 it is a high velocity layer. In this paper, the unknown parameters that estimate by the proposed method are the thicknesses of the soil layers and their S and P wave velocities. In the numerical examples, the stiffness matrix method is used for an accurate simulation of all P-SV wave fields. 2009-08 eng journal article VoR http://hdl.handle.net/10458/6386 https://miyazaki-u.repo.nii.ac.jp/records/5466 応用力学論文集 12 571 578 https://miyazaki-u.repo.nii.ac.jp/record/5466/files/methodofestimationofthicknes_2009_harada.pdf application/pdf 891.6 kB 2020-06-21