Estimation of Surface Geology Effect on Site Response Based on Nakamura's Technique-A Case Study in Eastern Ghoota, Damascus city, Syria

The dynamic soil characteristics in Eastern Ghoota, which is located on Damascus basin, was studied to estimate the predominant period and the amplification factor in all sites, using Nakamura's technique. This technique is considered as one of the important empirical techniques used in the world to study the surface geology effects on site response. About 1000 seismic noise measurements were carried out in 265 sites covering different geology deposits. The H/V spectra ratio were calculated and analyzed to determine the site predominant period and amplification factor. The results exhibit good correlation with the local geology and the modeling of geotechnical boreholes, whereas the predominant period and amplification factor values vary clearly from site to site.