The Effect Analysis of Topography on the Spectrum Properties of Anti-Plane Movement |
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Authors: | Rong Mianshui and Li Xiaojun |
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Institution: | [1]Institute of Crustal Dynamics, China Earthquake Administration, Beijing 100085, China [2]Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China |
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Abstract: | An explicit finite difference method is performed to evaluate the significance of topography effects on the seismic response of viscoelastic sites. The real accelerograms and hell-shape impulse wavelets, slope angle of cliff and angle of incidence on the spectrum property of the incoming waves are all discussed in detail. The conclusions show that the presence of topographic factors and the direction of the incident waves not only significantly affect the peak ground acceleration of a site, but also affect the spectrum properties of the incoming waves,and the effect on the direction of the incident waves is especially remarkable. The study also finds that it is reasonable to analyse spectrum properties with the input of impulse wavelets in the finite element simulation of wave motion. |
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Keywords: | Explicit finite difference method Viscoelastic site Finite element simulation of wave motion Topography effect |
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