Abstract
A closed-loop, time-efficient technique for site effect evaluation for seismic microzonation in urban areas is developed and implemented. It includes the following successive steps: microtremor measurements using a triangular array of three-component seismometers; estimation of the Nakamura horizontal-vertical spectral ratio, calculation of Rayleigh wave dispersion using the Aki spatial correlation method; inversion of the dispersion curve to determine a shear wave velocity model of the shallow subsurface; analytical computation of Rayleigh wave spectral ellipticity and 1-D SH transfer function for this model; and a comparison of empirical and analytical ratios and correction of the model if required. The technique has been tested at several locations in a number of towns near the active Jordan Rift valley. A reasonable agreement is obtained when comparing empirical spectral ratios and analytical transfer functions.
| Original language | English |
|---|---|
| Pages (from-to) | 447-463 |
| Number of pages | 17 |
| Journal | Soil Dynamics and Earthquake Engineering |
| Volume | 15 |
| Issue number | 7 |
| DOIs | |
| State | Published - Oct 1996 |
| Externally published | Yes |
Keywords
- Microtremor measurements
- Resonant frequency
- Site-effect
- Spatial correlation
- Spectral ratio
ASJC Scopus subject areas
- Civil and Structural Engineering
- Geotechnical Engineering and Engineering Geology
- Soil Science
