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

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K15883
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 40020:Wood science-related
• Research Institution: Tokyo 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
• 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

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.

Free Research Field

木質構造

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。