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Analytical Solutions for Scattering of Rayleigh Waves by Alluvial Valleys

Author: ZhangQiuHong
Tutor: LiangJianWen
School: Tianjin University
Course: Structural Engineering
Keywords: Rayleigh waves Alluvial valley Scattering Large arc assumes Analytical solutions Wave function expansion method
CLC: TU435
Type: Master's thesis
Year: 2004
Downloads: 31
Quote: 0
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Abstract


Deposition site of seismic wave scattering will affect the surface field ground motion , as well as on the ground near the building , so the solution of such problems , are of great significance in the theory and engineering applications . In this paper, the wave function expansion method gives the analytical solutions from simple to complex three cases : a single deposition Valley , layered alluvial valleys and depressions alluvial valley for incident plane Rayleigh wave scattering , and solution accuracy and convergence verification. On the wave function expansion method is : the first free-field incident potential function derivation , and then the use of the Fourier-Bessel series commenced practice in the corresponding boundary . The results show that : the deposition layer thickness , aspect ratio , sedimentary sequence and relative stiffness are varying degrees of impact on the surface displacement reaction . The presence of sediments will significantly increase the incident Rayleigh wave amplification , the amplification of up to no more than 2 times the corresponding terrain deposition ; sedimentary sequence and relative stiffness change will significantly change the dynamic characteristics of the site .

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CLC: > Industrial Technology > Building Science > Soil mechanics,foundation engineering > Soil Mechanics > Soil Dynamics and Vibration foundation
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