Mekonen, Freweyni (2016) The Role of Soil Amplification Studies in Seismic Hazard Assessment in Some Selected Parts of Adama Town, Central Ethiopia. Masters thesis, Addis Ababa University.
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PDF (The Role of Soil Amplification Studies in Seismic Hazard Assessment in Some Selected Parts of Adama Town, Central Ethiopia)
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Abstract
Seismic hazard is one of the most destructive natural phenomena in the world as well as in our country. Subsurface conditions play a major role in the damage potential due to earthquake and seismic soil amplification of a site. The average shear wave velocity of the soil in the top 30 m layer is an essential parameter controlling the amplification behavior of a site. The present study was conducted in some selected parts of Adama town mostly in the northeastern and eastern part. The work was conducted to estimate soil Amplification and its role in seismic hazard assessment as well as the determination of the relevant parameters of site period and the average shear wave velocity to 30m depth(Vs30). Controlled source Seismic data was collected at 19 sites and analyses of seismic refraction and multi-channel surface waves data were conducted to examine the P- and S-wave characteristics of the subsurface. Depths to the bedrock and geological structures, average shear wave velocity to a depth of 30m, site periods and amplification factor values were calculated. Maps and graphs were produced to show spatial distribution of the various parameters. The research results suggest that the study area is under considerable danger of soil amplification.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Soil amplification, amplification factor, site period, shear wave velocity(Vs30) and site classification |
| Subjects: | Q Science > Q Science (General) Q Science > QE Geology |
| Divisions: | Africana |
| Depositing User: | Selom Ghislain |
| Date Deposited: | 26 Sep 2018 07:31 |
| Last Modified: | 26 Sep 2018 07:31 |
| URI: | http://thesisbank.jhia.ac.ke/id/eprint/5620 |
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