Amplification pattern of the ground surface including underground circular inclusion subjected to incident SH-waves

Abstract

In this paper, amplification pattern of the ground surface was presented in the presence of an underground circular inclusion by a half-plane time-domain boundary element method (BEM). Based on the mentioned method, it was required that only the interface was discretized to create the inclusion model. Avoiding from discretizing the smooth ground surface as well as enclosing boundaries were the distinguished advantages of the present study compared with traditional BEM studies. After implementing the method in a general computer algorithm, the results were verified compared to existing literature responses. Finally, with considering some intended parameters including incident wave angle, inclusion depth, horizontal location and impedance ratio, a sensitivity analysis was carried out to obtain the maximum amplification of the surface. The results showed that seismic ground response was affected from all these parameters. The results can be used about creating safe domains, passive defense topic and also validating seismic codes.

Keywords

• half-plane bem
• time-domain
• circular inclusion
• sh-wave
• surface response