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首页> 外文期刊>Soil Dynamics and Earthquake Engineering >Investigation of ground vibrations induced by trains moving on saturated transversely isotropic ground
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Investigation of ground vibrations induced by trains moving on saturated transversely isotropic ground

机译：列车在饱和横观各向同性地面上行驶引起的地面振动的研究

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摘要

A 2.5D FEM (finite element method) is used to investigate the effects of soil parameters of transversely isotropic (cross anisotropic) saturated soil on ground vibrations and excess pore water pressures induced by moving train loads. The governing equations of transversely isotropic saturated soil are derived from the Boit's theory in frequency domain by applying the Fourier transform with respect to time, and 2.5D FE model is then established using Galerkin method. Correctness of the proposed model is validated with published data. Numerical results illustrate that the decrement of vibration amplitude and excess pore water pressure caused by the increment of vertical elastic modulus is more significant than that of the horizontal direction. Poisson ratios in both directions have little effect on ground vibrations, while an increase in horizontal Poisson ratio results in a significant increment in excess pore water pressure.
机译：2.5D FEM（有限元法）用于研究横向各向同性（正交各向异性）饱和土壤的土壤参数对列车振动引起的地面振动和过大孔隙水压力的影响。通过对时间进行傅立叶变换，从波伊特理论在频域上导出横观各向同性饱和土的控制方程，然后用Galerkin方法建立2.5D有限元模型。所提出模型的正确性已通过公开数据验证。数值结果表明，竖向弹性模量的增加引起的振动幅度的减小和孔隙水压力的增大比水平方向的减小更为显着。两个方向上的泊松比对地面振动几乎没有影响，而水平泊松比的增加会导致多余的孔隙水压力显着增加。

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