Location
San Diego, California
Presentation Date
29 May 2010, 8:00 am - 9:30 am
Abstract
This paper aims to investigate the site response of the sediment characteristics and to perform seismic hazard studies in Ankara, Turkey through conducting short-period noise recordings of microtremor measurements at 352 project site locations on the Upper Pliocene to Pleistocene fluvial and particularly Quaternary alluvial and terrace sediments in the Ankara basin. The spectral ratios relative to a firm site reference station (SSR) and the spectral ratio between the horizontal and vertical components (HVSR) of the microtremor measurements at the ground surface have been used to estimate the fundamental periods and the amplification factors of the site. The results of this study identified three main factors that influence site response, namely, the age of the near-surface deposits, the sediment thickness and the non-linear soil behavior. In particular, the HVSR results showed that the variation of the fundamental period map agreed well with the maximum value of the amplification as well as with the seismic sediment characteristics that provided satisfactory estimates of the site response of soft deposits.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
5th International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Publisher
Missouri University of Science and Technology
Document Version
Final Version
Rights
© 2010 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
Koçkar, M. K. and Akgün, H., "Evaluation of Local Site Conditions Using Ambient Seismic Noise Recordings: A Case Study from Ankara, Turkey" (2010). International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. 6.
https://scholarsmine.mst.edu/icrageesd/05icrageesd/session03b/6
Included in
Evaluation of Local Site Conditions Using Ambient Seismic Noise Recordings: A Case Study from Ankara, Turkey
San Diego, California
This paper aims to investigate the site response of the sediment characteristics and to perform seismic hazard studies in Ankara, Turkey through conducting short-period noise recordings of microtremor measurements at 352 project site locations on the Upper Pliocene to Pleistocene fluvial and particularly Quaternary alluvial and terrace sediments in the Ankara basin. The spectral ratios relative to a firm site reference station (SSR) and the spectral ratio between the horizontal and vertical components (HVSR) of the microtremor measurements at the ground surface have been used to estimate the fundamental periods and the amplification factors of the site. The results of this study identified three main factors that influence site response, namely, the age of the near-surface deposits, the sediment thickness and the non-linear soil behavior. In particular, the HVSR results showed that the variation of the fundamental period map agreed well with the maximum value of the amplification as well as with the seismic sediment characteristics that provided satisfactory estimates of the site response of soft deposits.
