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Seismic intensity estimation through questionnaire survey and collapse rates of various building types in the 2003 Bam, Iran, earthquake

Tetsuo Tobita, Masakatsu Miyajima, Abdolhossein Fallahi, Reza Alaghebandian and Mohanmad Reza Ghayamghamian
Seismic intensity estimation through questionnaire survey and collapse rates of various building types in the 2003 Bam, Iran, earthquake
Earthquake Spectra (November 2007) 23 (4): 841-865

Abstract

Seismic intensity in the epicentral area of the 2003 Bam, Iran earthquake is estimated using a questionnaire survey conducted two months after the earthquake. The estimated average seismic intensity on the Japan Meteorological Agency (JMA) scale is 6.1 (VIII to IX in the MMI scale). The peak frequency of the horizontal-to-vertical spectral ratio derived from microtremor measurements conducted during reconnaissance is also compared with the seismic intensity. Collapse rates for various structure types, such as adobe, unreinforced/reinforced masonry, steel-frame, and reinforced concrete, are obtained by counting the number of demolished buildings within an area of about 50-m radius around an observation point. Results show large differences in collapse rates between unreinforced and reinforced masonry, and suggest the upper limit of seismic intensity that unreinforced masonry can sustain. This fact can be utilized for an initial damage assessment within affected areas after large earthquakes.


ISSN: 8755-2930
EISSN: 1944-8201
Serial Title: Earthquake Spectra
Serial Volume: 23
Serial Issue: 4
Title: Seismic intensity estimation through questionnaire survey and collapse rates of various building types in the 2003 Bam, Iran, earthquake
Affiliation: Kyoto University, Disaster Prevention Research Institute, Kyoto, Japan
Pages: 841-865
Published: 20071101
Text Language: English
Publisher: Earthquake Engineering Research Institute, Berkeley, CA, United States
References: 28
Accession Number: 2021-005209
Categories: SeismologyEngineering geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table
N25°00'00" - N39°30'00", E44°00'00" - E63°19'60"
Secondary Affiliation: Kanazawa University, JPN, JapanAzarbaijian University of Tarbiat Moallem, IRN, IranBu-Ali Sina University, IRN, IranInternational Institute of Earthquake Engineering and Seismology, IRN, Iran
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2021, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 202102
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