INFLUENCE OF UNDERGROUND CAVITY ON THE SEISMICRESPONSE OF U-SHAPED CANYON USING BEM

A 2D scattering and diffraction of plane P and SV waves induced by a U-shaped canyon above underground cavities is proposed herein to account for the topographic effect of such a canyon. Time domain boundary element method(BEM),w ere performed to study the behaviour of this problem. To show the interaction between U-shaped cany ons and underground cavities and their effects on the surface ground motion, a parametric analysis is carried out in very long periodic bands.Influence of various parameters hasbeen investigated. It is shown that site geometry, wave characteristics, and cavi ty location are the key parameters governing the canyon’s response. In this regard, the important param eters considered in this study are: the width of the underground cavities; the cavity depth; radios of cavity and shape of canyon.

کلیدواژه ها:

Amplification Pattern ، Underground Cavity ، U-Shaped Canyon ، Boundary Element Method (BEM) ، Parametric Study