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Characteristics of Earthquake Motious in the Boundary Zone between the Plain and the Mountains

Research Project

Project/Area Number 62550420
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Building structures/materials
Research InstitutionOsaka Institute of Technology

Principal Investigator

OHBA Shintaro  Osaka Institute of Technology, 工学部, 助教授 (50079521)

Project Period (FY) 1987 – 1988
Project Status Completed (Fiscal Year 1988)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1988: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1987: ¥1,400,000 (Direct Cost: ¥1,400,000)
KeywordsEarthquake observation / Mountain / Plain / Boundary zone / Acceleration / Predominant period / duration time / 表面波 / 山地と平野 / 山地と平野の境界領域 / 地震動特性 / 大阪平野 / 微動測定 / 微動特性 / 振幅 / 地盤構造
Research Abstract

The Osaka Plain is surrounded by mountainous regions and is located in the northeast of a submerged oval-shaped basin with a 40 Km mior axis and 80 Km major axis. Earthquake motions in the Osaka Plain, surrounded by mountains on all sides, are affected not only by ground conditions but also largely by the topography around the observation station, which demonstrates the following intersting characteristics.
(1) Earthquake duration in the central part of the plain is remarkably longer than in the surrounding mountains. This is due to the fact that the main motion is compounded by surface waves propagated from the surrounding mountains.
(2) Predominant periods in the plain can be classified into three band: a 0.2 to 0.6 second band, an approx, 1 second band and a 1.5 to 4 seconds band. The short period band of the 0.2 to 0.6 second band is affected by local ground conditions of the surface layer of the observation station. The period band of approx. 1 second is due to the surface wave propagated through sedimentary layer of the plain.
(3) The maximum acceleration is caused by the main wave whose short period component of less than 1 second is predominant. The acceleration in the plain is usually larger than that in surrounding mountains. The acceleration amplitude in the boundary between the plain and the mountains is especially large. Amplification of an acceleration amplitude in the plain is remarkable in the long period zone of more than 1 second when compared with that in the mountain regions.

Report

(3 results)
  • 1988 Annual Research Report   Final Research Report Summary
  • 1987 Annual Research Report
  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] 大場新太郎: 日本建築学会近畿支部研究報告集. 28. 405-408 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 大場新太郎: 中研所報. 21. 294-313 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] OHBA,SHINTARO: 日中地震学会合同大会講演集. (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 大場新太郎: 土質工学研究発表講演集. 24. (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 大場新太郎: 日本建築学会近畿支部研究報告集. 29. (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] OHBA, SHINTARO: "Characteristics of Micro-tremors in Osaka Plain" Report on Research by A,I.J., Kinki Brauch.28. 405-408 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] OHBA, SHINTARO: "Characteristics of Earthquake Motious in the Boundary Zone between the Plain and the Mountaius" Memoirs of central Research Laboratory. 21. 294-313 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] OHBA, SHINTARO: "Comparison of Characteristics of Earthquake Motious in the Osaka Plain and Surrounding Mountainous Regious." Proceedings of Sino-Japan Conference on Seismological Research.(1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] OHBA, SHINTARO: "Characteristics of Micro-tremors in the Bouudary Zone between the Osaka Plain and Surrounding Mountainous Regions." Proceedings of the 24th Japan National Couference on Soil Mechauics and Foundation Engineering. (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] OHBA, SHINTARO: "Characteristics of Earthquake Motious in the Boundary Zone between the Osaka Plain and Surrounding Mountainous Regious." Report on Research by A.I.J., Kinki Branch.(1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 大場 新太郎: 日本建築学会近畿支部研究報告集. 28. 405-408 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] 大場 新太郎: 中研所報(大阪工大摂南大学中央研究所発行). 21. 294-313 (1989)

    • Related Report
      1988 Annual Research Report
  • [Publications] OHBA.SHINTARO: 日中地震学会合同大会講演集. (1989)

    • Related Report
      1988 Annual Research Report
  • [Publications] 大場 新太郎: 土質工学研究発表講演集. 24. (1989)

    • Related Report
      1988 Annual Research Report
  • [Publications] 大場 新太郎: 日本建築学会近畿支部研究報告集. 29. (1989)

    • Related Report
      1988 Annual Research Report
  • [Publications] 大場 新太郎: 日本建築学会近畿支部研究報告集. 28. (1988)

    • Related Report
      1987 Annual Research Report

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Published: 1987-04-01   Modified: 2016-04-21  

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