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Bulletin of the Seismological Society of America; April 1991; v. 81; no. 2; p. 346-357
© 1991 Seismological Society of America
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Amplification of obliquely incident seismic waves by cylindrical alluvial valley of arbitrary cross-sectional shape. Part II. Incident SH and rayleigh waves

K. R. KHAIR, S. K. DATTA and A. H. SHAH

DEPARTMENT OF MECHANICAL ENGINEERING AND CIRES UNIVERSITY OF COLORADO, BOULDER, COLORADO 80309
DEPARTMENT OF CIVIL ENGINEERING UNIVERSITY OF MANITOBA, WINNIPEG, Canada , R3T 2N2

Abstract

Amplification of ground motion in three dimensions due to cylindrical alluvial valleys of arbitrary cross section is investigated in this paper. The incident wave is either a plane SH or Rayleigh wave, propagating at an arbitrary angle to the axis of the valley. A hybrid numerical method combining boundary integral representation and finite element discretization has been employed. Numerical results show significant amplification depending on the angles of incidence and geometries of the valleys.

Footnotes

Present address: Atomic Energy of Canada Limited (AECL) Research Company, Pinawa, Manitoba, Canada R0E 1L0.




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