Title of article :
Semi-analytical analysis of the isolation to moving-load induced ground vibrations by trenches on a poroelastic half-space
Author/Authors :
Cao، نويسنده , , Zhigang and Cai، نويسنده , , Yuanqiang and Bostrِm، نويسنده , , Anders and Zheng، نويسنده , , Jianguo، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2012
Pages :
15
From page :
947
To page :
961
Abstract :
A semi-analytical model is proposed to investigate the screening efficiency of trenches to moving-load induced ground vibrations. The ground is modeled as a fully saturated poroelastic half-space governed by Biotʹs dynamic poroelastic theory. The trenches are obtained by placing three rectangular elastic layers with appropriate width upon the poroelastic half-space. By Helmholtz decomposition, the displacement fields of the elastic layers are decomposed into three scalar potentials. Analytical solutions are obtained based on Fourier transform and Fourier series in the transformed domain. The time-domain results are obtained by the fast Fourier transform (FFT). The different performances of trenches on a saturated poroelastic half-space and a single-phase elastic half-space to the moving load-induced ground vibration are identified. It is found that the discrepancy of the screening efficiencies between the two models becomes significant when the load speed approaches the Rayleigh wave speed of the ground surface. Also, some parametric studies for the screening efficiency of the trench on the poroelastic half-space are presented.
Journal title :
Journal of Sound and Vibration
Serial Year :
2012
Journal title :
Journal of Sound and Vibration
Record number :
1400510
Link To Document :
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