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A STUDY ON DYNAMIC CHARACTERISTICS OF TRADITIONAL WOODEN BUILDING BY MICRO TREMOR MEASUREMENT

Research Project

Project/Area Number 06452290
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Building structures/materials
Research InstitutionNARA NATIONAL CULTURAL PROPERTIES RESEARCH INSTITUTE

Principal Investigator

UCHIDA Akito  NARA NATIONAL CULTURAL PROPERTIES RESEARCH INSTITUTE CENIRE FOR ARCHAEOLOGICAL OPERATIONS,DIVISION OF RESEARCH,SENIOR RESEARCH OFFICER, 埋蔵文化財センター・研究指導部, 主任研究官 (90142017)

Co-Investigator(Kenkyū-buntansha) KAWAI Naohito  BUILDING RESEARCH INSTITUTE,MINISTRY OF CONSTRUCTION,RESEARCH DIVISION 3, SENIOR, 第3研究部, 主任研究員 (70186047)
Project Period (FY) 1994 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥7,500,000 (Direct Cost: ¥7,500,000)
Fiscal Year 1996: ¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1995: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1994: ¥3,900,000 (Direct Cost: ¥3,900,000)
KeywordsTRADITIONAL WOODEN BUILDING / MICRO TREMOR / FFT ANALYSIS / NATURAL FREQUE / VIBRATION MODE / DAMPING FACTOR / 柱傾斜 / 常時微動測定 / 古建築 / 構造安定性 / 固有周期 / 振動解析 / 耐震性 / 耐風性 / 非破壊計測
Research Abstract

To understand dynamic characteristics of traditional wooden buildings, micro tremor measurements were performed on rebuilt buildings of Heijo palace site and Horyuji buildings. By the FFT analysis we obtained the knowledges as the following.
1. Rebuilt buildings : Four spectrum peaks from 4Hz to 10Hz, and three vibration modes which were parallel mode in the ridge direction, parallel mode in the beam direction and torsional mode in order from lower frequency. Analytic natural frequencies and vibration modes agreed well with those of measurement in lower frequencies.
2. Horyuji pagoda : Three natural frequencies under 10Hz, which were 0.9Hz, 2.5Hz, and 4.2Hz. Vibration mode at 0.9Hz was parallel mode in the diagonal direction and at 2.5Hz it was virtical second mode with phases reversed at the height of 5th story culumn botom. Locus of 5th story shows sometimes parallel vibration and sometimes circular vibration. Values of stiffness which decrease as the story number increase.
3. Kondo and … More Chumon : Two natural frequencies for each building under 10Hz, which were 1.80Hz and 2.07Hz for kondo and 1.56Hz and 1.80Hz for Chumon. For both buildings, primary vibration mode was parallel mode in the beam direction and second mode was parallel mode in the ridge direction. Damping factors were 1.7-4.4%. Values of stiffness of Kondo first story calculated from natural frequencies were 2.79-3.69*10^4kg/cm and the percentage of stiffness due to column rocking resistance is considered to be 75-81%.
4. Dai-kodo : Four natural frequencies under 10Hz, which were 1.7Hz, 2.1Hz, 2.5Hz and 4.1Hz. Primary vibration mode was parallel mode in the beam direction and second mode was parallel mode in the ridge direction. The Third mode was twist mode in the beam direction. Damping factors were 1.9-2.5%. Values of stiffness of Dai-kodo calculated from natural frequencies were 1.9-2.5%. Values of stiffness of Dai-kodo calculated from natural frequencies were 1.62*10^4 -2.50*10^4 kg/cm and the percentage of stiffness due to column rocking resistance is considered to be 88-95%. Less

Report

(4 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • 1994 Annual Research Report
  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 河合 直人, 内田 昭人, 前川 秀幸: "伝統的木造建築物の振動特性その1.平城宮跡復元建物の常時微動測定" 日本建築学会大会学術講演梗概集 C-1. 55-56 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 内田 昭人, 河合 直人, 前川 秀幸: "伝統的木造建築物の振動特性その2.法隆寺五重塔の常時微動測定" 日本建築学会大会学術講演梗概集 C-1. 171-172 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 河合 直人, 内田 昭人, 前川 秀幸: "伝統的木造建築物の振動特性その3.法隆寺金堂および中門の常時微動測定" 日本建築学会大会学術講演梗概集 C-1. 173-174 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 前川 秀幸, 内田 昭人, 河合 直人: "伝統的木造建築物の振動特性その4.法隆寺大講堂の常時微動測定" 日本建築学会大会学術講演梗概集 C-1. 175-176 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] KAWAI Naohito, UCHIDA Akito and MAEKAWA Hideyuki: "Dynamic Characteristics of Traditional Wooden Building Part 1 : Micro Tremor Measurement on Rebuilt Buildings of Heijo Palace site" Report of the Annual Meeting of the Architectural Institute of Japan. C-1. 55-56 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] UCHIDA Akito, KAWAI Naohito and MAEKAWA Hideyuki: "Dynamic Characteristics of Traditional Wooden Building Part 2 : Micro Tremor Measurement on Horyuji Pagoda" Report of the Annual Meeting of the Architectural Institute of Japan. C-1. 171-172 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] KAWAI Naohito, UCHIDA Akito and MAEKAWA Hideyuki: "Dynamic Characteristics of Traditional Wooden Building Part 3 : Micro Tremor Measurement on Horyuji Kondo and Chumon" Report of the Annual Meeting of the Architectural Institute of Japan. C-1. 173-174 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] MAEKAWA Hideyuki, UCHIDA Akito and KAWAI Naohito: "Dynamic Characteristics of Traditional Wooden Building Part 3 : Micro Tremor Measurement on Horyuji Dai-Kodo" Report of the Annual Meeting of the Architectural Institute of Japan. C-1. 175-176 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 内田昭人,河合直人,前川秀幸: "伝統的木造建築物の振動特性その2.法隆寺五重塔の常時微動測定" 日本建築学会大会学術講演梗概集 C-1. 171-172 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 河合直人,内田昭人,前川秀幸: "伝統的木造建築物の振動特性その3.法隆寺金堂および中門の常時微動測定" 日本建築学会大会学術講演梗概集 C-1. 173-174 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 前川秀幸,内田昭人,河合直人: "伝統的木造建築物の振動特性その4.法隆寺大講堂の常時微動測定" 日本建築学会大会学術講演梗概集 C-1. 175-176 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 内田昭人,河合直人,前川秀幸: "伝統的木造建築物の振動特性 その1.平城宮跡復元建物の常時微動特性" 日本建築学会大会学術講演梗概集 C-1. 55-56 (1995)

    • Related Report
      1995 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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