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A STUDY ON ASEISMIC PROPERTIES OF MOMENT-RESISTANT FRAMES WITH CONCRETE-FILLED TUBULAR BRACINGS

Research Project

Project/Area Number 08650673
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Building structures/materials
Research InstitutionKYUSHU UNIVERSITY

Principal Investigator

KAWANO Akihiko  KYUSHU UNTVERSITY,FACULTY OF ENGINEERING,ASSOCIATE PROFESSOR, 工学部, 助教授 (60136520)

Co-Investigator(Kenkyū-buntansha) SAKAI Junnichi  KYUSHU UNTVERSITY,FACULTY OF ENGINEERING,RESEARCH ASSISTANT, 工学部, 助手 (30215587)
Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 1997: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1996: ¥1,300,000 (Direct Cost: ¥1,300,000)
KeywordsCONCRETE-FILLED TUBE / BRACING MEMBER / ASEISMIC PROPERTY / CONNECTION / JOINT / RIGID FRAME / FRACTURE / JOINT EFFICIENCY
Research Abstract

The objectives of this study are (1)to make clear the proper details of joints for concrete-filled tubular bracings (CFT bracings) ; and (2) to discuss about an estimation method of the aseismic properties of moment-resistant frames with the CFT bracings. In l996, monotonous compression and tension tests have been conducted for the models of fiat gusset plate joints, cross-shaped gusset plate joints, and flange joints. The experimental parameters are the wadged lengths of the gusset plates and the diameter-to-thickness ratios (D/T ratios) of tubes. The test resulted that every type of the joint could have the joint effciency of 85%, if the wedged length would be larger than the specified values for the joints ofhollow tubular members. The deformability of the CFT bracings could be also realized by every type of joints. In l996 and l997, a cyclic loading test has been conducted for the CFT bracings. In the test, the cracks or breaking failures were observed in tubes but not in the joint … More s. Therefore, it can be said that every type of joints stands the cyclic axial loading. Adding to that, the loading cycles at which the crack or breaking happened in tubes could be accurately predicted by the Authors, estimation method. In l997, a horizontal cyclic loading test has been performed for the two moment-resistant portal frames with CFT bracings which tubes' D/T ratios were 20 (frame A) or 30 (frame B). The frame A specimen showed an anti-symmetrical one of the plastic collapse mechanisms. In the mechanism, one of a pair of bracings buckled but the other never buckled. The frame B specimen formed a symmetrical mechanism in which both of the bracings buckled. The symmetrical mechanism may be preferable because the energy dissipation could be expected for both the bracings. The anti-symmetrical mechanism is an unique phenomenon in a frame with CFT bracings but never in a frame with hollow tubular bracings. In terms of the energy dissipation, a frame with CFT bracings may be more advantageous than that with hollow tubular bracings, because one of a pair of bracings would contribute the energy dissipation at least. Less

Report

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

    (7 results)

All Other

All Publications (7 results)

  • [Publications] 大道寺 崇, 河野 昭彦 他2: "繰返し軸方向力を受けるコンクリート充填鋼管部材の継手に関する実験的研究(その1) 単調圧縮および単調引張試験" 日本建築学会九州支部研究報告構造系. 第36号. 549-552 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 小川 雄一郎, 河野 昭彦 他2: "単調軸力を受けるコンクリート充填鋼管部材のガセットプレート継手に関する研究" 日本建築学会大会学術講演梗概集. 949-950 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.DAIDOUJI,A.KAWANO,et al: "AN EXPERIMENTAL STUDY ON JOINTS FOR CFT BRACINGS UNDER CYCLIC AXIALLOADS,PART I MONOTONOUS COMPRESSION AND TENSION TESTS" RESEARCH REPORTS,KYUSHU BRANCH,ARCHITECTURAL INSTITUTE OF JAPAN. NO.36. 549-552 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Y.OGAWA,A.KAWANO,et al: "A STUDY ON BEHAVIOR OF CONCRETE-FILLED TUBULAR JOINTS WTTH GUSSET PLATE UNDER MONOTONIC AXIAL LOADING" SUMMARIES OF TECHNICAL PAPERS OF ANNUAL MEETING,ARCHITECTURAL INSTITUTE OF JAPAN. 949-950 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 大道寺崇・河野昭彦 他2: "繰返し軸方向力を受けるコンクリート充填鋼管部材の継手に関する実験的研究(その1)単調圧縮および単調引張試験" 日本建築学会九州支部研究報告集 構造系. 第36号. 549-552 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 小川雄一郎・河野昭彦 他2: "単調軸力を受けるコンクリート充填鋼管部材のガセットプレート継手に関する研究" 日本建築学会大会学術講演梗概集(関東). 949-950 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 大道寺崇・河野昭彦他2: "繰返し軸方向力を受けるコンクリート充填鋼管部材の継手に関する実験的研究その1単調圧縮および単調引張試験" 日本建築学会九州支部研究報告集構造系. 第36号(番号291). (1997)

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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