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Journal of Applied Sciences
  Year: 2007 | Volume: 7 | Issue: 22 | Page No.: 3368-3380
DOI: 10.3923/jas.2007.3368.3380
 
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Uniform Hazard Spectra for Different Northern Part of Tehran, Iran

Gholamreza Ghodrati Amiri, Seyed Ali Razavian Amrei, Ramin Motamed and Behnoud Ganjavi

Abstract:
In this study, probabilistic evaluation of seismic hazard in metropolitan Tehran, capital of Iran, is presented. The present study has been done in north part of Tehran due to the existence of high-rise buildings, important structures and the flourishing of high-rise building constructions in this zone. The objective of this study was the preparation of spectral acceleration maps with different seismic hazard levels for some specific periods. A set of historical and instrumentally recorded seismic data have been employed covering the timeline from 4 centuries BC up to 2003 and the seismic sources were modeled in a radius of 200 km around Tehran. The calculations for horizontal motion were carried out using two weighted horizontal attenuation relationships; using Logic Tree method. The calculations for vertical motion were carried out. Probabilistic seismic hazard evaluation was performed on a grid of 16x9 points in north part of Tehran using SEISRISK III. The corresponding results have been depicted by horizontal spectral acceleration maps with 2 and 10% PE (Probability of Exceedence) in 50 years and by vertical spectral acceleration maps with 10% PE in 50 years. The results show that whenever soil type changes from rocky to stiff, there is an increase in the spectral acceleration in that region. However in eastern north parts of Tehran, due to approaching to the north Tehran faults and also being situated over small or large faults of the region, there will be higher spectral accelerations than other points.
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How to cite this article:

Gholamreza Ghodrati Amiri, Seyed Ali Razavian Amrei, Ramin Motamed and Behnoud Ganjavi, 2007. Uniform Hazard Spectra for Different Northern Part of Tehran, Iran. Journal of Applied Sciences, 7: 3368-3380.

DOI: 10.3923/jas.2007.3368.3380

URL: https://scialert.net/abstract/?doi=jas.2007.3368.3380

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