SEISMIC RESPONSE ANALYSIS OF STRUCTURES EMBEDDED IN LAYERED SOIL WITH IMPEDANCE TRANSFORM TO TIME DOMAIN : Part2 Modification of transfer method and response analysis based on discrete soil analysis model

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  • 地盤インピーダンスの時間領域変換による成層地盤に埋込まれた構造物の地震応答解析 : その2 変換法の改良及び離散的地盤解析モデルに基づく応答解析
  • ジバン インピーダンス ノ ジカン リョウイキ ヘンカン ニ ヨル セイソウ ジバン ニ ウメコマレタ コウゾウブツ ノ ジシン オウトウ カイセキ ソノ 2 ヘンカンホウ ノ カイリョウ オヨビ リサンテキ ジバン カイセキ モデル ニ モトヅク オウトウ カイセキ

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The author has studied the time domain evaluation of soil impedance and has proposed a transform method. In a previous paper, structures deeply embedded in layered soil were investigated based on the embedded SR model. However, actual soil often has inhomogeous conditions that can not be expressed by theoretical impedance like that used in the paper. For estimating such soil conditions, discrete soil analysis models like FEM are employed. In this paper, a modified transform method was proposed to improve the convergence characteristics, first. Then, full-matrix soil impedance of structures embedded in inhomogeous soil was calculated by axi-symmetric FEM models. The full-matrix impulse response was evaluated by the modified method, and earthquake response analyses were carried out. The efficacy of the proposed method was confirmed through these studies.

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