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1997 Fiscal Year Final Research Report Summary

Study on The Damage due to the Qayen Earthquake of May 10, 1997 in Northeast Iran

Research Project

Project/Area Number 09400004
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research InstitutionToyo University

Principal Investigator

HAKUNO Motohiko  Faculty of Engineering, Toyo University, Professor, 工学部, 教授 (10016321)

Co-Investigator(Kenkyū-buntansha) TOWHATA Ikuo  School of Engineering, University of Tokyo, Professor, 工学系大学院, 教授 (20155500)
IMAIZUMI Toshifumi  Faculty of Education, Yamanashi University, Professor, 教育学部, 教授 (50117694)
KAGAMI Hiroshi  School of Engineering, Hokkaido University, Professor, 工学系大学院, 教授 (70016476)
SATO Hiroshi  Earthquake Research Institute, University of Tokyo, Associate Professor, 地震研究所, 助教授 (00183385)
IKEDA Yasutaka  School of Science, University of Tokyo, Associate Professor, 理学系大学院, 助教授 (70134442)
Project Period (FY) 1997
KeywordsEarthquake damage / Earthquake fault / Adobe / Site effect / Topological effect on damage
Research Abstract

At 12:27(local time) on 10 May 1997, a large earthquake (Ms=7.1) took place in northeastern Iran several tens of kilometers west of the border with Afghanistan, killing 1,568 people. The elevation of the epicentral area is about 1,500m high and the area is located between mountains and hills. There is almost no greenery near the site because of the dry climate, and being very hot in summer and very cold in winter. Because of the lack of timber, people use adobe (unburned, dried mud bricks) as the main construction material ; An adobe house is one of the weakest type of structures subjected to an earthquake. The number of casualties are much lower than that expected from the similar event was because the earthquake occurred at noon (local time). Most of the people were working outside in the fields and were not killed or injured by the collapse of house.
We surveyed the surface ruptures and other geologic effects associated with the earthquake. The rupture zone extends 110km, striking NNW-SSE, with a dominant strike slip (1.0-2.1 m right lateral).
Heavy damage occurred along the surface fault, but in the northern part where the 1979 earthquake struck, damage was not as severe as elsewhere. The area affected has many improved buildings of brick masonry or RC-frame construction. These new buildings showed better performance and suffered less damage than traditional types. Site conditions and topology where the buildings are located played an important role for their damage.

  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] Motohiko HAKUNO,et al:: "Preliminary report of the damage due to the Qayen Earthquake of 1997,Northeast Iran,"Jurnal of Natural Disaster Science,. Vol.19,No.1,. 67-81 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 水谷 俊夫、堀 宗朗:: "雁行状断層のモデル実験と応力場逆解析による構成則推定法"応用力学論文集、. Vol.2,. 7-13 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Motohiko HAKUNO, et al.: "Preliminary report of the damage due to the Qayen Earthquake of 1997, Northeast Iran"Journal of Natural Disaster Science. Vol.19,No.1. 67-81 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ikeda, Y., Imaizumi, T., Sato, H., Hessami, K., and Khatib, M.M.: "Surface faults associated with the Qayen, northeast Iran, earthquake of May 10, 1997"Active Fault Research. vol.18. 1-13 (1999)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2001-10-23  

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