TY - JOUR ID - 1990 TI - Ground Motion Amplification due to Underground Cavities Subjected to Incident SV and P In-Plane Waves JO - Scientia Iranica JA - SCI LA - en SN - 1026-3098 AU - Oliaei, M. AU - Alitalesh, M. AD - Department of Civil Eng., Tarbiat Modares University, Tehran, 14115-397, Iran Y1 - 2015 PY - 2015 VL - 22 IS - 5 SP - 1703 EP - 1711 KW - underground cavity KW - ground seismic motion KW - finite difference KW - SV wave KW - P wave DO - N2 - When a fault crashes, seismic body waves travel away the source to the ground surface. Seismic wave characteristics change due to source, path and site effects. Site effects consist of surface and subsurface irregularities such as cavities can affect the properties of seismic waves. Therefore, in this study the effects of underground cavities on surface ground motion amplification are investigated for circular and elliptical shapes. Underground cavities are subjected to the vertically propagating SV and P in-plane waves. The effects of dimensionless frequency, depth of cavity, geometry of cavity and also presence of the second cavity are studied in this research. Results show that increasing of dimensionless frequency, causes increase in ground motion amplification for both cases of incident SV and P waves. It is also resulted depth and geometry of cavity can cause very important effects on the ground seismic motion. Presence of second cavity can also aggravate the ground surface seismic motion in addition to the first cavity UR - https://scientiairanica.sharif.edu/article_1990.html L1 - https://scientiairanica.sharif.edu/article_1990_c6ae0f84f0d1eb40c748d1678c980bc1.pdf ER -