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1994 Fiscal Year Final Research Report Summary

Study on Stiffness and Ultimate Behavior of Multi-Planar Joints for Tubular Space Trusses

Research Project

Project/Area Number 05452256
Research Category

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

Allocation TypeSingle-year Grants
Research Field Building structures/materials
Research InstitutionKumamoto University

Principal Investigator

KUROBANE Yoshiaki  Kumamoto Univ. Faculty of Engineering Prof, 工学部, 教授 (30040372)

Co-Investigator(Kenkyū-buntansha) OCHI Kenshi  Kumamoto Univ. Faculty of Engineering Assoc. Prof., 工学部, 助教授 (20145288)
OGAWA Koji  Kumamoto Univ. Faculty of Engineering Assoc. Prof., 工学部, 助教授 (80112390)
YAMANARI Minoru  Kumamoto Univ. Guraduate School of Assistant Science and Technology, 自然科学研究科, 助手 (90166760)
MAKINO Yuji  Kumamoto Univ. Faculty of Engineering Prof, 工学部, 教授 (70040433)
Project Period (FY) 1993 – 1994
KeywordsSteel Tube / Space Truss / Tubular Joint / Ultimate Capacity / Stiffness / Buckling / Loading Test / Finite Element Analysis
Research Abstract

The ultimate behavior of tubular double K-joints, which are the most representative joints among diverse multi-planar joints, was studied. Two types of ultimate capacity equations for double K-joints under symmetrical axial brace loading were derived from this study. The first one has the best possible accuracy with a coefficient of variation (COV) of 0.06, while the second one was simplified by relinquishing accuracy slightly (COV=0.1). Ultimate capacity equations with good accuracy were also derived for double K-joints under anti-symmetrical axial brace loading. These equations are based not only on experimental results but also on finite element analysis results, the latter ones having been obtained through a cooperative research with investigators in University College Swansea. Another important topic that our strength prediction equations proposed in the past may err on the unsafe side for joints with extremely heavy chords, which was argued by the same investigators in Swansea, w … More as also studied. Both experimental and numerical results showed that our proposed equations are applicable to joints with such heavy chords. Through these investigations some principal requirements for combining experimental and numerical results to evaluate ultimate capacities of tubular joints were found.
From this onvestigation the ultimate behavior of multi-planar joints was made clear. Efforts are now being continued to establish design rules applicable to all the multi-planar joints. A few tentative desigh equations have already been proposed. For this purpose a database including 2000 data sets (joints) from both experimmental and numerical results have been prepared.
With regards to interactions between frame and joint behavior, the following conclusions have been drawn :
1. When a failure of a joints is the first failure event in a truss structure, our proposed ultimate capacity equations accurately predict the capacity of the joiint.
2. When bucking of a member is the first failure enent, joints fail at loads lower than those predicted by our wquations owing to stress re-distribution taking place after bucking of members.
3. The ultimate behavior of trusses after bucking of members can be reproduced by an analysis that takes into account effects of stress re-distribution. However this analysis is too complex for the use in design practice. An aternative method of design is to design the joints to have capacities 25% greater than buckling loads of members. In this latter case an earthquake resistant design of truss structures that includes post-buckling energy absorbing capacity bees performed. Less

  • Research Products

    (20 results)

All Other

All Publications (20 results)

  • [Publications] Y.Kurobane: "AWS versus AIJ Tubular K-Connection Design Rules" Spatial, Lattice and Tension Structures Proc. IASS-ASCE Int. Symposium, Atlanta. 190-199 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] J.C.Paul: "The Ultimate Capacity of Multiplanar TT-and KK-Joints: Comparison of Data to Predictions of AWS and API Design Equations" International Journal of Offshore and Polar Engineering. Vol.4 No.2. 134-141 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 山上正喜: "円形鋼管Double-K継手の耐力式の改良" 日本建築学会大会学術講演梗概集(東海). 1227-1228 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] J.C.Paul: "Ultimate Resistance of Unstiffened Multiplanar Tubular TT-and KK-Joints" Journal of Structural Engineering, ASCE. Vol.120 No.10. 2853-2870 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Makino: "Further Tests on Unstiffened Tubular KK-Joints" Proceedings of 5th International Conference on Steel Structures, Jakarta. 183-190 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Makino: "Tests on CHS KK-Joints under Anti-Symmetrical Loads" Proceedings of 6th International Symposium on Tubular Structures, Melbourne. 449-456 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Makino: "Tests on CHS KK-Joints under Anti-Symmetrical Loads" International Institute of Welding Doc.XV-E-94-206. 1-8 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 米村英樹: "逆対称荷重を受ける円形鋼管KK継手の耐力と変形に関する実験" 日本建築学会九州支部研究報告. 第35号. 517-520 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Makino: "Proposed Ultimate Capacity Equations for CHS KK-Joints under Anti-Symmetrical Loads" Proceedings of the 5rd International Offshore and Polar Engineering Conference, The Hague. Vol.IV. 6-11 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 黒羽 啓明: "鋼管構造の挙動と設計に関する最近の研究" 日本建築学会, 346 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Kurobane: "AWS versus AIJ Tubular K-Connection Dsign Rules" Spatial, Lattice and Tension Structures Proc. IASS-ASCE Int. Shimposium, Atlanta. 190-199 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] J.C.Paul: "The Ultimate Capacity of Multiplanar TT-and KK-Joints : Comparison of Data to Predictions of AWS and API Design Euations" International Journal of Offshore and Polar Engineering. Vol.4, No.2. 134-141 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Yamagami: "Improved Ultimate Capacity Equations for Double K-Joints" Summary Papers, Annual Conf. Architectrual Institute of Japan. (in Japanese). 1227-1228 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] J.C.Paul: "Ultimate Resistance of Unstiffened Multiplanar Tubular TT-and KK-Joints" Journal of Structural Engineering, ASCE. Vol.120, No.10. 2853-2870 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Makino: "Further Tests on Unstiffened Tubular KK-Joints" Proceedings of 5th International Conference on steel Structures, Jakarta. 183-190 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Makino: "Tests on CHS KK-Joints under Anti-Symmetrical Loads" Proceedings of 6th International Symposium on Tubular Structures, elbourne. 449-456 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Makino: "Tests on CHS KK-Joints under Anti-Symmetrical Loads" International Institute of Welding, Doc.XV-E-94-206. 1-8 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Yonemura: "Test on Ultimate and Deformation Capacities of Tubular KK-Joints under Anti-Symmetrical Loads" Research Report, Kyushu Branch of Atrcihtectrual Institute of Japan. No.35 (in Japanese). 517-520 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Makino: "Proposed Ultimate Capacity Equations for CHS KK-Joints under Anti-Symmetrical Loads" Proceedings of the 5rd International Offshore and Plar Engineering Conference, The Hague. Vol.IV. 6-11 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Kurobane: "Recent Research Developments in the Behavior and Design of Tubular Structures" Architectrual Institute of Japan. (in Japanese). 346 (1994)

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

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Published: 1997-03-04  

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