عنوان مقاله [English]
Previous studies indicate that modeling is one of the main parameters influencing the site seismic response. In fact, it is expected that more reasonable response will be obtained as the modeling becomes more realistic. This paper applies a novel boundary element algorithm based on the time-convoluted traction kernels to evaluate the spatially varying earthquake ground motions of the Pacoima dam subjected to SH, SV incident waves. An accurate 3D model of the dam canyon is implemented into the computer code BEMSA to investigate the seismic response of the dam. The analyses are performed in time domain with a linear elastic constitutive behavior for the medium. This modeling procedure has been validated by comparison of the results with the existing literature. According to the results of this study, the response of the dam to earthquake waves is generally influenced by predominant frequency of the incident motion, surface topography, relative distance of observation points, and type of the incident seismic wave. For the cases considered in this study, the incident SV wave has led to the maximum amplification of incident motions, especially at the left side of the dam.