Sharif University of Technology Scientia Iranica 1026-3098 25 3 2018 06 01 Non-linear seismic ground response analysis considering two-dimensional topographic irregularities 1083 1093 4257 10.24200/sci.2017.4257 EN Navid Soltani Department of Civil Engineering, Faculty of Engineering, Shahid Bahonar University of Kerman, Kerman, Iran Mohammad Hossein Bagheripour Department of Civil Engineering, Faculty of Engineering, Shahid Bahonar University of Kerman, Kerman, Iran Journal Article 2016 06 05 In the event of an earthquake, local site conditions such as soil characteristics, dimension of topographic irregularities, seismic bedrock depth, etc. and also characteristics of incident wave have important effects on seismic ground response. In this study, Finite Element Method (FEM) coupled to Viscous Boundaries is used to evaluate the effect of empty two-dimensional valleys on amplification or attenuation of seismic waves. Parametric studies carry out and the effects of dimension of the topography, frequency of the incident wave and bedrock depth on the seismic ground response are considered using non-linear method in a time domain analysis. Results are shown by means of horizontal and vertical amplification ratio in valley span and its surrounding area. It is concluded that displacement variation on ground surface due to topographical effects is a considerable factor to select a site location or design structures in the valley mount and its surrounding area. https://scientiairanica.sharif.edu/article_4257_40b0d4f9bf9a216d30e48b128b53caea.pdf