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Proposal of an evaluation method of splitting strength in drift pinned joint with steel inserted plate.

Research Project

Project/Area Number 19K15883
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 40020:Wood science-related
Research InstitutionTokyo City University (2021)
The University of Tokyo (2019-2020)

Principal Investigator

OCHIAI YO  東京都市大学, 建築都市デザイン学部, 講師 (90822346)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords割裂 / 製材 / 木材 / ドリフトピン / 鋼板挿入 / 耐力推定法 / 設計法 / 鋼板挿入ドリフトピン接合部 / 繊維方向 / 複数本
Outline of Research at the Start

近年、学校校舎や体育館などの中大規模木造建築が増加している。これらの建築を設計する際、これまでの住宅等の規模が小さい建物よりも厳密に構造計算を行う必要がある。木造建築の構造において接合部は重要な役割を果たしており、それらは概して割裂破壊が弱点となるため、割裂破壊の理論的な解明し、破壊を未然に防ぐような計算手法が求められている。
本研究は、木造建築において一般的なドリフトピン接合部が地震時に引き起こす割裂破壊の理論的な解明を行い、設計手法の提案を行うことを目的としている。

Outline of Final Research Achievements

There are many unexplained fracture phenomena in wood and wood based materials, and splitting fracture is one of them. In recent years, wooden buildings have become larger than conventional residential buildings, such as offices and school buildings, and more rigorous structural design is required when designing such buildings. This study analyzes the splitting failure of drift pinned joints with steel inserted plate and steel sided plates, which is a common type of joint in large-scale wooden buildings, and proposes a method for estimating the splitting strength. The results of this research are: (1) a splitting strength estimation formula for a drift pinned joint with steel inserted plate was proposed and experimentally verified, and (2) the effects of wood size and joint arrangement on the splitting strength of a joint with multiple drift pins were analyzed.

Academic Significance and Societal Importance of the Research Achievements

本研究は木造建築物において一般的である鋼板挿入ドリフトピン接合や鋼板添板ドリフトピン接合の割裂耐力推定法を提案するというものである。これにより、昨今増加している中大規模木造建築物についてより厳密な構造設計を可能にし、大地震のような災害時の木造建築の倒壊を未然に防ぐことにつながる。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (3 results)

All 2021

All Presentation (3 results) (of which Int'l Joint Research: 1 results)

  • [Presentation] VERIFICATION OF SPLITTING STREGNTH ON DRIFT PINNED JOINT WITH A STEEL INSERTED PLATE TO THE EVALUATION METHOD2021

    • Author(s)
      Yo Ochiai, Kenji Aoki, Masahiro Inayama
    • Organizer
      World Conference on Timber Engineering 2021
    • Related Report
      2021 Annual Research Report 2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 繊維方向に複数本配置したドリフトピン接合部の割裂耐力に関する研究2021

    • Author(s)
      落合陽、青木謙治、稲山正弘
    • Organizer
      日本建築学会大会2021(東海)
    • Related Report
      2021 Annual Research Report
  • [Presentation] 繊維方向に複数本配置したドリフトピン接合部の割裂耐力に関する研究2021

    • Author(s)
      落合 陽, 青木謙治, 稲山正弘
    • Organizer
      2021年度日本建築学会大会
    • Related Report
      2020 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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