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2001 Fiscal Year Final Research Report Summary

Research on the Prevention of Brittle Fracture in High-Rise Steel Buildings

Research Project

Project/Area Number 11355024
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Building structures/materials
Research InstitutionThe University of Tokyo

Principal Investigator

KUWAMURA Hitoshi  The Univ. of Tokyo, Graduate School of Engineering, Professor, 大学院・工学系研究科, 教授 (20234635)

Co-Investigator(Kenkyū-buntansha) INABA Yuichiro  The Univ. of Tokyo, Graduate School of Engineering, Res. Associate, 大学院・工学系研究科, 助手 (90312975)
Project Period (FY) 1999 – 2001
KeywordsHigh-Rise Building / Steel Structure / Brittle Fracture / Seismic Safety / Steel Material / Welding / Earthquake / Design Technology
Research Abstract

This research aims at clarifying the cause of brittle fracture in steel building frames as observed during the 1995 Hyogoken-Nanbu Earthquake which hit the modern urban city. The final target of this research is to propose a design method to prevent the brittle fracture which is anticipated in high rise buildings in earthquake-prone urban areas. This research deals with the following subjects :
1) How much degree of safety degradation is anticipated in steel structures by brittle fracture?
2) What is the possible mode of brittle fracture in tall steel buildings of modern architecture?
3) What is the governing property in steel material on brittle fracture?
4) What effect is given by welding on brittle fracture of steel connections?
5) What effect is given by hysteretic deformation during earthquake on brittle fracture?
6) How failsafe mechanism is possible after occurrence of brittle fracture in buildings?
7) How sophisticated design methodology can be provided for preventing brittle fracture from this research and current related knowledge.
This research, on the basis of the combination of experimental test and analytical simulation, has provided resolutions to the above questions as well as basic information on brittle fracture. From synthesizing these data, a tentative design and construction method is proposed. However, it is also understood that the phenomenon of brittle fracture during earthquake is a very complicated one including many physical factors, then further research is required to attain the final conclusions.

  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] 桑村仁, 伊山潤, 松井康治: "鉄骨の脆性破断に及ぼす材料靱性と板厚の影響"日本建築学会構造系論文集. 525. 109-116 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 桑村仁, 高木直人, 松井康治: "鉄骨の脆性破断に及ぼす溶接入熱の影響"日本建築学会構造系論文集. 531. 157-164 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 稲葉雄一郎, 桑村仁: "切欠き付き鋼板の応力-ひずみ解析における有限要素法の適用性と延性き裂発生条件"日本建築学会構造系論文集. 534. 137-144 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 桑村仁, 杉田朋哉, 横山幸夫: "鉄骨梁破断後の床スラブのバックアップ効果"日本建築学会構造系論文集. 547. 169-176 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 桑村仁, 高木直人: "「破断履歴の相似則」の検証"日本建築学会構造系論文集. 548. 139-146 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kuwamura, H., Iyama, J., Matsui, K.: "Effect of Material Toughness and Plate Thickness on Brittle Fracture of Steel Members"J. Struct. Constr. Eng., AIJ.. 525. 109-116 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kuwamura, H., Takagi, N., Matsui, K.: "Effects of Welding Heat Input on Brittle Fracture of Steel Members"J. Struct. Constr. Eng., AIJ.. 531. 157-164 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Inaba, Y., Kuwamura, H.: "Applicability of Finite Element Method to Stress-Strain Analysis of Notched Steel Plates and Criterion for Ductile Crack Initiation"J. Struct. Constr. Eng., AIJ.. 534. 137-144 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kuwamura, H., Sugita, T., Yokoyama, Y.: "Backup of Floor Slab Following Fracture of Steel Beam"J. Struct. Constr. Eng., AIJ.. 547. 169-176 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kuwamura, H., Takagi, N.: "Verification of Similitude Law of Pre-Fracture Hystereses"J. Struct. Constr. Eng., AIJ.. 548. 139-146 (2001)

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

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Published: 2003-09-17  

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