The effect of local irregular topography on seismic ground motion
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Effects of irregular topography on ground motion for incident P, SV and the propagation of Rayleigh waves are studied by combining finite element method with modified transmitting boundary. Theoretical models include isolated protruding topography and similar adjacent protruding topography. The conclusion drawn from this study is that the effects of isolated protruding topography are remarkably larger for Rayleigh wave propagation than for P and SV body waves; Considering adjacent irregular topography, ground motion is amplified, the duration of ground motion becomes longer and the spectral ratios exhibit narrowband peaks. Considering adjacent irregular topography and Rayleigh wave propagation, the theoretical results will more approach the results obtained in practice.
Key wordsground motion irregular topography seismic wave
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