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1998 Fiscal Year Final Research Report Summary

Standardization of Testing Method for Tension Softening Diagrams of Concrete through Inverse Analysis and Applications

Research Project

Project/Area Number 09555136
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field 土木材料・力学一般
Research InstitutionGifu University

Principal Investigator

ROKUGO Keitetsu  Faculty of Engineering, Gifu University, Professor, 工学部, 教授 (40127155)

Co-Investigator(Kenkyū-buntansha) KURIHARA Norihiko  Musashi Institute of Technology, Assistant, 工学部, 助手 (50262746)
UCHIDA Yuichi  Faculty of Engineering, Gifu University, Associate Professor, 工学部, 助教授 (20213449)
Project Period (FY) 1997 – 1998
KeywordsConcrete / Tension softening diagram / Inverse Analysis / Standardization / Fracture Mechanics
Research Abstract

In this study, we intended to establish a testing method for determination of tension softening diagrams of concrete based on discussions with researchers in the world. We evaluated the properties of steel fiber reinforced concrete and recycled aggregate concrete using the determined tension softening diagrams. In addition, the bond properties of concrete were also evaluated through the diagrams.
The program of Finite Element Inverse Analysis for the accurate determination of the tension softening diagrams from experimental load- displacement curves of concrete beam specimens has been proposed in the report of the subcommittee on size effect (chairman : K.Rokugo) under JSCE concrete committee. The preferable conditions for the shape and size of beam specimens and for the measurements of displacement were indicated. An example of the loading apparatus for the stable measurement of load- displacement curves was also shown.
The international workshop on the establishment of testing methods for the diagrams and applications was held in Gifu in October 1998. It was agreed in the workshop that the applicability of the tension softening diagrams is superior. to other fracture mechanics parameters and that the simplification of the diagrams should be taken depending on the applications. It was recommended that a technical committee on the standardization of the testing methods for the diagrams should be made in RILEM as well as JCI in Japan.
It was found in this study that the diagrams were effective for the performance evaluation of steel fiber reinforced concrete differing in sorts of fibers, fiber contents and mortar matrix strength. It was pointed out that the shape of the diagrams did not depend on the specimen sizes, when the fiber content was less than 2 % by volume. The flexural fracture behavior of recycled aggregate concrete could be well distinguished through the shapes of the tension softening diagrams.

  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] K.ROKUGO: "Trends in Numerical Analysis of Concrete Structures in Japan" Finite Elements in Engineering and Science. 15-25 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N.KURIHARA: "Evaluation of Properties of Steel Fiber Reinforced Concrete by means of Tension Softening Diagrams" Fracture Mechanics of Concrete Structures. Vol.1. 465-476 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.UCHIDA: "Tension Softening Curves of Concrete Determined from Different Test Specimen Geometries" Fracture Mechanice of Concrete Structures. Vol.1. 387-398 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 橘高 義典: "セメント系複合材料の引張軟化曲線の標準試験方法についての一考察" コンクリート工学年次論文報告集. Vol.19 No.2. 27-32 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 中村成春: "コンクリートの引張軟化特性の標準試験方法に関する研究" コンクリート工学論文集. Vol.10 No.1. 151-164 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 清水 大輔: "コンクリートの引張軟化特性に及ぼす骨材の影響" コンクリート工学年次論文報告集. Vol.20 No.3. 157-162 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 六郷恵哲 (共著): "コンクリートの寸法効果と引張軟化曲線" 土木学会 コンクリート委員会 寸法効果小委員会, 92 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Rokugo and Y.Uchida: "Trends in Numerical Analysis of Concrete Structures in Japan, Finite Elements Engineering and Science" Balkema. 15-31 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Kurihara, Y.Uchida, T.Kamada, T.Arakawa and K.Rokugo: "Evaluation of Properties of Steel Fiber Reinforced Concrete by Means of Tension Softening Diagrams, Fracture Mechanics of Concrete Structures." AEDIFICATIO Publishers. Vol.1. 465-476 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Uchida and B.I.G.Barr: "Tension Softening Curves of Concrete Determined from Different Test Specimen Geometries, Fracture Mechanics of Concrete Structures" AEDIFICATIO Publishers. Vol.1. 387-398 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Titsutaka, N.Kurihara, H.Mihashi and S.Nakamura: "Discussion on Standard Test Methods to Determine Tension Softening Diagram of Cementitious Composites (Japanese)" Proc.of JCI.Vol.19, No.2. 27-32 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Nakamura, Y.Kitsutaka, H.Mihashi and Y.Uchida: "Discussion on Standard Evaluation Method for Tension Softening Properties of Concrete (Japanese)" Concrete Research and Technology, JCI. 151-164 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] D.Shimizu, S.Nawa, Y.Uchida and W.Koyanagi: "Influence of Aggregate on Tension Softening Properties of Concrete (Japanese)" Proc.of JCI. Vol.20, No.3. 157-162 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Rokugo, Y.Uchida, N.Kurihara, and et al.: "Size Effect and Tension Softening Diagrams of Concrete, Concrete Engineering Series 18, Concrete Committee (Japanese)" JSCE. 92 (1997)

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

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Published: 1999-12-08  

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