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A Fundamental Study about the Design of Impact Fatigue Strength for Metal-fastener Joints of Wood-based Board Construction

Research Project

Project/Area Number 07456082
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 林産学
Research InstitutionKYUSHU UNIVERSITY

Principal Investigator

MATAKI Yoshihiro  Kyushu University, Agriculture, Professor, 農学部, 教授 (50038212)

Co-Investigator(Kenkyū-buntansha) FUJIMOTO Yoshiyasu  Kyushu University, Agriculture, Assistant Professor, 農学部, 助手 (40165428)
Project Period (FY) 1995 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥5,200,000 (Direct Cost: ¥5,200,000)
Fiscal Year 1997: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1996: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1995: ¥3,200,000 (Direct Cost: ¥3,200,000)
Keywordswood-based board construction / wood screw joint / impact bending test / behavior of impact response / shear-wall / nailed joint / shear test / impact fatigue strength / 二面せん断試験 / 衝撃力 / 金具接合 / AE発生挙動
Research Abstract

In this research, first, the fundamental response behavior of the acceleration pulse and strain developed by impact loading were investigated, and secondly the transition of the response behavior and the decrease process of joint stiffness with the repetition of impact loading were examined. For the experiment, some simplified models of typical joint (nail and wood screw) between various wood-based boards such as plywood, oriented strand board, particleboard, and medium density fiberboard or between wood-based boards and frame materials (wood) were prepared under various joint conditions.
First, static bending test with AE (Acoustic emission) measurement was carried out for H-figured joint specimen of particleboard jointed with wood screw as a simple model of a typical wood-based board construction.
As a result, itwas evident that the minute destruction progress in the joint, the decrease of joint stiffness and the distribution of stress in the beam were closely related each other. In im … More pact bending test, both the influences of joint stiffness on strain distribution over the beam and of the impact load level on the joint stiffness were elucidated. It was suggested that the amount of the strain in the joint point and the quarter point of the beam was available for the evaluation of the joint stiffness, as a result of analyzing the strain distribution (moment distribution) in the mechanical model of the beam elastically supported at both ends.
Secondarily, the static and repetitive impact tests were carried out for the compression type shearing specimen, in which various wood-based boards were connected with nail to both sides of the main member (frame), as a simple model of nailed joint in shear wall. The following results were obtained ; it was evident that the optimum thickness of side member were existed, when the length of nail was constant as used in this experiment. The rate of increase in amount of slipping displacement tended to decrease largely, depending on the combination of the kind of side member and the magnitude of impact load, because of the densification of wood due to the irreversible compressive deformation of members around shank of nail. It was also confirmed that the fatigue process, such as loosening between both members and decreasing of stiffness of joints subjected to repetitive impact loading, depended to a great extent upon the kind and thickness of side member and the magnitude of impact load. Less

Report

(4 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • 1995 Annual Research Report
  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] 藤元 嘉安: "木ねじによるパーティクルボード接合体の静的曲げにおけるAE発生挙動" 第46回日本木材学会大会研究発表要旨集. 194 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 藤元 嘉安: "金具接合による木質ボード構造体の衝撃応答特性" 第3回日本木材学会九州支部大会講演集. 49-50 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 藤元 嘉安: "せん断耐力壁釘接合部の繰返し衝撃せん断試験-面材種類及び厚さの影響-" 第47回日本木材学会大会研究発表要旨集. 219 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 長尾 吉伸: "木質ボード耐力壁の釘接合部における衝撃疲労挙動" 第48回日本木材学会大会研究発表要旨集. 239 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yoshiyasu Fujimoto, Rie Momoki and Yoshihiro Mataki: "AE generation behavior in static bend test of particleboard construction jointed with wood screw" Abstracts of the 46th Annual Meeting of the Japan Wood Research Society. 194 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yoshiyasu Fujimoto, Takahiro Hayashi and Yoshihiro Mataki: "Impact response of wood-based board construction jointed by metal fastener" Abstracts of the 3rd Annual Meeting of the Japan Wood Research Society Kyushu branch. 49-50 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yoshiyasu Fujimoto, Takahiro Hayashi and Yoshihiro Mataki: "Repetitive impact shearing test of nailed joint in shear wall - Influence of kind and thickness of side members -" Abstracts of the 47th Annual Meeting of the Japan Wood Research Society. 219 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yoshinobu Nagao, Yoshiyasu Fujimoto and Yoshihiro Mataki: "Impact fatigue behavior of nailed joints in shear wall of wood-based board" Abstracts of the 48th Annual Meeting of the Japan Wood Research Society. 239 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 藤元嘉安: "木質ボード耐力壁の釘接合部における衝撃疲労挙動" 第48回日本木材学会大会研究発表要旨集. (印刷中). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 藤元嘉安: "パーティクルボードのはく離試験におけるAE発生挙動" 材料. 46・4. 79-84 (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] 藤元嘉安: "繰返し負荷を受ける木質部材ボルト接合部のすべり挙動" 九州大学農学部演習林報告. 76. 1-13 (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] 藤元嘉安: "せん断耐力壁釘接合部の繰返し衝撃せん断試験" 第47回日本木材学会大会研究発表要旨集. (印刷中). (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] 藤元嘉安: "金具接合による木質ボード構造体の衝撃応答特性" 第3回日本木材学会九州支部大会講演集. 49-50 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 又木義博、藤本嘉安: "木質ボード構造体接合部の破壊発現と衝撃応答挙動" 日本木材学会誌. (発表予定).

    • Related Report
      1995 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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