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1993 Fiscal Year Final Research Report Summary

A study on th rigidity and strenght of traditional cotter-pin joints

Research Project

Project/Area Number 04650532
Research Category

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

Allocation TypeSingle-year Grants
Research Field Building structures/materials
Research InstitutionKUMAMOTO INSTITUTE OF TECHNOLOGY

Principal Investigator

MURAHASHI Hisaaki  KUMAMOTO INSTITUTE OF TECHNOLOGY, DEPARTMENT OF ARCHITECTURE, PROFESSOR, 工学部, 教授 (70040376)

Project Period (FY) 1992 – 1993
KeywordsCOTTER-PIN JOINTS / SIDE-MEMBER / SIDE-RATE(t / s) / INITIAL STIFFNESS FACTOR(tau / delta) / SHEARING STRENGTH(tau)
Research Abstract

This report is stated about the rigidity and shearing strength in tension test with COTTER-PIN JOINTS(joint or connection).
It is necessary to precede the major damage in COTTER-PIN(kashi : evergreen oak) more than that a few damage in SIDE-MEMBER(sugi : japanese cedar) occur in tension test for specimens with cotter-pin in side-member. In this case, the SIZE-RATE(t/s) between side-member thickness(t) and cotter-pin depth(s) conform to the region of 1.2-2.3, and the end distance(L) of side-member is L(〕SY.gtoreq.〔)5・s, and the cotter-pin depth(s) is s(〕SY.ltoreq.〔)B/5 (B : principal member or side-member depth).
The INITIAL STIFFNESS FACTOR(tau/delta) obtaine from the average of rising gradient on elastic region in the SHEARING STRENGTH-DISPLACEMENT CURVE, moreover the relation between initial stiffness factor(tau/delta) and size-rate(t/s) is formularized as follws : (tau/delta) = 270.0(t/s + 1.0) [kgf/cm^3]. With the size-rate(t/s), we can to predict the SHEARING STRENGTH(tau) of cotter-pin(kashi) as follows : tau = 110.1(t/s) + 98.3 [kgf/cm^2]
Therefore, it is possible to analyze results based on experiment for the traditional COTTER-PIN JOINTS in beam-column frame through this paper.

  • Research Products

    (1 results)

All Other

All Publications (1 results)

  • [Publications] 村橋久昭・他: "木造伝統工法にみられる継手・仕口の強度・変形性状に関する研究 その1.込栓と側材に関する剛性と強度確認" 日本建築学会研究報告 九州支部. 第・34号・1. 225-228 (1994)

    • Description
      「研究成果報告書概要(和文)」より

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Published: 1995-03-27  

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