Influence of geological factors on seismic ground-motions (seismic microzoning of Prague) |
| |
| Authors: | Ji?í Zahradník Vlastislav ?ervený Vladimír Barták Reviewer V Kárník |
| |
| Institution: | (1) Institute of Geophysics, The Charles University, Prague |
| |
| Abstract: | Summary Seismic microzoning of Prague was performed using geological data and seismic response (ground shaking) computations. The Prague territory was covered by a square grid, each square 250 m×250 m being characterized by a simplified geological cross-section from the Earth's surface to the bedrock boundary. The data were obtained from detailed engineering-geological maps 1:5000. The geological cross-sections were transformed into a set of layered models, specified by the thicknesses of individual layers and corresponding compressional and shear-wave velocities, densities and parameters of the causal absorption. The seismic responses were computed by the matrix method. The main amplitude and frequency characteristics of the responses are demonstrated in the form of microzoning maps. The maps do not depend on the specific type of seismic excitation. They make it possible to predict the relative amplification of P and S waves, with respect to the bedrock outcrop, all over the city. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
