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Seismic Effects of Two-Dimensional Semi-Sine Shaped Hills on Ground Motion Response
Aida Nazari Graduate Student, School of Civil Engineering, Iran University of Science and Technology, 16765-163, Narmak, Tehran, Iran
Mohammad Hassan Baziar Professor, School of Civil Engineering, Iran University of Science and Technology, 16765-163, Narmak, Tehran, Iran Habibi Shahnazari Assistant Professor, School of Civil Engineering, Iran University of Science and Technology | |
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ABSTRACT |
This paper presents the results of a numerical study on seismic behavior of two-dimensional semi-sine shaped hills subjected to vertically propagating incident in-plane shear waves, using the finite difference method. The role of some key parameters, such as shape ratio, wavelength, and presence of neighboring features are investigated in this research. It is shown that increasing the shape ratio and the wave length generally aggravates the topographic and neighboring features effects. Moreover, neighboring features significantly affect both horizontal and vertical components of motion. Its effects include higher amplification and de-amplification values for medium to very high dimensionless frequencies, and lower values for medium to very low dimensionless frequencies, compared to isolated ridges.
Keywords: Neighboring topography; Semi-Sine shaped hill; Shape ratio; Wave length; Finite difference method.
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