Abstract
Analytical methods for site response analysis include many parameters that could affect earthquake ground motions and corresponding response spectra. It is important to investigate the effect of these parameters on site response analysis in order to make confident evaluations of earthquake ground motons at site. This paper presents a parametric study to investigate the effects of site parameters on earthquake ground motions. The parametric study is performed on two hypothetical soil profiles that consist of sand and clay, respectively. The site parameters investigated are the secant shear modulus, low-strain damping ratio, types of sand and clay, location of water table, and depth of bedrock. From the results of the parametric studies, it appears that the secant shear modulus, depth of bedrock, and types of sand and clay have a significant effect on the results of site response analysis. Conversely, the low-strain damping ratio and variations of water tables have only a minor influence on site response analysis.
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