Ground Response in Alluvial Basins Due to Seismic Disturbances.
Final rept. Mar 81-Sep 84,
COLUMBIA UNIV NEW YORK
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This report summarizes the scientific accomplishments of this contract. These include 1 Five preliminary basin models for SH-waves and three for elastic P and SV waves were studied using the finite element method. The results of these problems are presented either by synthetic seismograms or by snapshots 2 Modification and improvement of the two dimensional finite element computer codes with particular attention being paid to save computer in-core storage and computing time 3 Development of a new finite element technique to simulate different types of seismic sources. An example of demonstrating the difference in waveforms due to different types of source is appended 4 A detailed description and users guide for the two-dimensional elastodynamic finite element computer program developed at Aldridge and adapted to the VAX 11 computer at AFGL is provided. Keywords Geologic models BasinsGeographic Finite element modeling Wave propagation Seismic source simulation.