3401 地下鉄走行時地盤振動の3次元FEM解析の一事例(SS3-3 環境,SS3 環境とエネルギ,J-Rail 2006)

概要

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Up to this time, the wave-transmissibility simulation of subway induced vibration has been treated as 2D and/or 2.5D problem because of its large dimension toward the line. As the validity of the two dimensional approach is restricted within plane stress/strain problems, the approach can not be used to examine the influence of the ambient vibration to the buildings constructed in the vicinity to the subway tunnel with finite dimensions along the line. In this paper, we try to analyze wave-transmissibility problem via 3D FEM approach in order to investigate the feasibility of 3D analysis and to check the calculation precision concerning to the effective frequency range of the wave, using multipurpose dynamic analysis code LS-DYNA and 2GB memory PC, and using moving point-excitation technique.
2006-12-13