Earthquake Science

, Volume 23, Issue 2, pp 149–155 | Cite as

Simulation of the seismic response of sedimentary basins with constant-gradient velocity along arbitrary direction using boundary element method: SH case

  • Zengxi GeEmail author


We presented a boundary element method using the approximate analytical Green’s function given by Sánchez-Sesma et al. Coordinate transform is introduced to extend the method to deal with the model with constant-gradient velocity along oblique direction. The method is validated by comparing the numerical results with other independent methods. This method provides a useful tool for analyzing local site effects. We computed seismic response for two series of models. The results in both frequency and time domains are analyzed and show complex amplification patterns. The fundamental mode of resonance is dependent not only on the velocity at the free surface but also on the velocity distribution of the whole basin. For the higher modes of vibration the heterogeneous basin also has its own characteristic.

Key words

boundary element SH wave seismic response constant-gradient velocity 

CLC number



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Copyright information

© The Seismological Society of China and Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  1. 1.Department of Geophysics, School of Earth and Space SciencesPeking UniversityBeijingChina

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