J Earthq Eng 8(1):1–43Īssimaki D, Jeong S (2011) Coupled topography-stratigraphy effects during the m 7.0 Haiti earthquake: the case of hotel Montana. Soil Dyn Earthq Eng 24:167–180Īssimaki D, Gazetas G (2004) Soil and topographic amplification on canyon banks and the 1999 Athens earthquake. Finally, the results of this research show the important effect of the motion intensity on the 2D behavior of the valley specially on the increase of the resonance period at higher period.Īlvarez S, Sanchez-Sesma FJ, Benito J, Alarcon E (2004) The direct boundary element method: 2D site effects assessment on laterally varying layered media (methodology). Also, the use of the 1D analyes for the estimation of the 2D behavior remains insufficient. Based on results the 2D behavior not only is dominant at the latreal parts of the valley, but also affects the behavior of the inner parts. While the lateral parts are sensitive to lower periods, the maximum amplification of the inner parts takes place at higher periods. Also, the frequency domain results show that different parts of the valleys are sensitive to different periods. It was seen that variation of the bedrock inclination not only affects the peaks of the spectral amplification curves, but also the position of the maximums of the curves on the valley surface are changed. Also, by conducting 1D analyses along the valley the aggravation curve for every case are evaluated and discussed. The analyses results are presented in the form of the acceleration and spectral acceleration amplification curves. Using several different real earthquake motions provide opportunity for the assessment of the site response to the variation of the motion intensity.
#Flac3d rayleigh damping ratio mohr coulomb code#
A numerical study using nonlinear code which utilizes appropriate static and dynamic boundary conditions, and includes hysteresis damping formulation based on user defined degradation curves is conducted utilizing two sandy and clayey materials. For this purpose a range of bedrock inclinations at the valley sides from slighter \(10^\) are selected. In this paper a numerical study on the effects of the basin edge on the dynamic behavior of the model basins are investigated.
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