Location
Chicago, Illinois
Date
04 May 2013, 10:30 am - 11:30 am
Abstract
The characteristics of strong ground motion at a given site depend upon the source mechanism, the transmission path together with the geological characteristics of source to the site, and the local soil conditions at the site, mostly known in the engineering and seismological literature as site effects. In the context of the stochastic simulation methods (e.g. Boore 1983), site effects play a significant rule in ground-motion studies. The objective of this paper is the assessment of site effects (both crustal amplification and near surface attenuation) in the Iran plateau. The effects in different parts of Iran were estimated based on the average shear wave velocity of upper 30 m that is presented in site classification system of NEHPR. For deeper depths the global data of CRUST 2.0 model were used and shear wave velocity profiles in different depths were assessed accordingly. Afterwards, using the quarter-wave length method the crustal amplification have been determined for a grid of 1° by 1° over the whole country. In addition the near surface attenuation effect was estimated using the empirical correlation between kappa and shear wave parameters proposed by chandler et al. (2006). The final results are presented as site effects contours in the frequency range of most interest to engineers for the Iranian plateau.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
7th Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
Missouri University of Science and Technology
Document Version
Final Version
Rights
© 2013 Missouri University of Science and Technology, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Fakhimnia, Mohammad Ebrahim; Zafarani, Hamid; and Rad, Shima Shams, "Estimation of Site Effects in the Iranian Plateau Using the Quarter-Wavelength Method" (2013). International Conference on Case Histories in Geotechnical Engineering. 10.
https://scholarsmine.mst.edu/icchge/7icchge/session04/10
Estimation of Site Effects in the Iranian Plateau Using the Quarter-Wavelength Method
Chicago, Illinois
The characteristics of strong ground motion at a given site depend upon the source mechanism, the transmission path together with the geological characteristics of source to the site, and the local soil conditions at the site, mostly known in the engineering and seismological literature as site effects. In the context of the stochastic simulation methods (e.g. Boore 1983), site effects play a significant rule in ground-motion studies. The objective of this paper is the assessment of site effects (both crustal amplification and near surface attenuation) in the Iran plateau. The effects in different parts of Iran were estimated based on the average shear wave velocity of upper 30 m that is presented in site classification system of NEHPR. For deeper depths the global data of CRUST 2.0 model were used and shear wave velocity profiles in different depths were assessed accordingly. Afterwards, using the quarter-wave length method the crustal amplification have been determined for a grid of 1° by 1° over the whole country. In addition the near surface attenuation effect was estimated using the empirical correlation between kappa and shear wave parameters proposed by chandler et al. (2006). The final results are presented as site effects contours in the frequency range of most interest to engineers for the Iranian plateau.
