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A Study on Application of High Strength Steels for the Development of Structural Functions

Research Project

Project/Area Number 02555101
Research Category

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

Allocation TypeSingle-year Grants
Research Field 土木構造
Research InstitutionOsaka University

Principal Investigator

FUKUMOTO Yuhshi  Osaka Univ., Dept. of Civil Engineering, Professor, 工学部, 教授 (10023045)

Co-Investigator(Kenkyū-buntansha) KAMEI Yoshinori  Osaka Univ., Dept. of Civil Engineering, Research Assoc., 工学部, 助手 (80224690)
OHTANI Yasuhiro  Osaka Univ., Dept. of Civil Engineering, Research Assoc., 工学部, 助手 (40194196)
OHKURA Ichiro  Osaka Univ., Dept. of Civil Engineering, Assoc. Professor, 工学部, 助教授 (10127194)
MATSUI Shigeyuki  Osaka Univ., Dept. of Civil Engineering, Professor, 工学部, 教授 (70029271)
NISHIMURA Nobuo  Osaka Univ., Dept. of Civil Engineering, Professor, 工学部, 教授 (70029156)
Project Period (FY) 1990 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥11,900,000 (Direct Cost: ¥11,900,000)
Fiscal Year 1991: ¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 1990: ¥8,200,000 (Direct Cost: ¥8,200,000)
Keywordssteel / Low Yield Ratio / Material Property / Plasticity Model / Cross-sectional Strength / Limiting Slenderness Ratio / connection / ductility / 鋼構造 / 高張力鋼 / ひずみ硬化 / 曲げ強度 / 変形能 / 塑性強度 / デ-タベ-ス
Research Abstract

Recently, some kinds of high performance structural steel have been developed by the iron manufactures in Japan. In this research project concerning with the development on structural functions of steel structures the high strength steels with low yield ratio (LYR steel) were focused, and the material properties and structural behaviors of LYR steels were surveyed by the experimental and numerical investigations.
The following results can be obtained :
1. Material Properties of LYR Steel
A data-base on the material properties such as yield ratio, uniform elongation, hardening strain, etc. of LYR steels was framed by the inquiries for steel manufactures and lots of tensile test. For LYR 60 steel which has 60kgf/cm^2 static tensile strength, the material properties were evaluated statistically.
2. Hysteretic Performance of LYR Steel under Uniaxial Compression-Tension
Dafalias-Popov's two surface plasticity model was examined by a series of cyclic loading test for several structural steels including LYR steels. Introducing the movement of bounding lines, the reduction of elastic range and the appropriate modification of shape parameter, the uniaxial cyclic behavior of test results can be successfully simulated.
3. Cross-Sectional Strength and Deformation Capacity of I-Section Beans Using LYR Steel
Using the stress-strain relation representating LYR 60 steel chosed by the data-base, the comparative investigations by elasto-plastic finite displacement analysis were conducted. In case of compact sections the superiority in ductility of LYR steel to the customary high strength steel can be observed.
4. Strength and Ductility of Frame Corners Using LYR Steel
Box to box connection models of steel frames made from LYR steel and customary high strength steel were tested under cyclic loading. The difference on hysteretic behavior due to material could not be observed, and each models have almost same deformation capacity.

Report

(3 results)
  • 1991 Annual Research Report   Final Research Report Summary
  • 1990 Annual Research Report

Research Products

(7 results)

All Other

All Publications (7 results)

  • [Publications] Nishimura,N.,Fuchisaki,K.: "Material properties and cross-sectional strength of low yield ratio high tensile steels" Technical Reports of Osaka University. Vol.42. (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Nishimura,N.,Honda,Y.,Ono,K.: "Correction of two-suface model for hysteretically loaded structural steels" Technical Reports of Osaka University. Vol.42. (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Nishimura, N. and Fuchisaki, K.: "Material properties and crosssectional strength of low yield ratio high tensile steels" Tech. Repts of Osaka Univ.42. (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Nishimura, N. Honda, Y. and Ono, K.: "Correction of two-suface model for hysteretically loaded structural steels" Tech. Repts of Osaka Univ.42. (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Nishimura,N.Fuchisaki,K.: "Material properties and cross-sectional strength of low yield ratio high tensile steels" Technical Reports of Osaka University. Vol.42. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] Nishimura,N.Honda,Y.Ono,K.: "Correction of two-suface model for hysteretically loaded structural steels" Technical Reports of Osaka University. Vol.42. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] 福本 誘士,西村 宣男,渕先 弘一: "低降伏比高張力鋼の機械的性質に関するデ-タベ-ス" 構造工学論文集.

    • Related Report
      1990 Annual Research Report

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Published: 1990-03-31   Modified: 2016-04-21  

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