Structural behavior prediction of SFRC beams by a novel integrated approach of X-ray imaging and finite element method

Sopokhem Lim, Ramiz Ahmed Raju, Mitsuhiro Matsuda, Takehiro Okamoto, Mitsuyoshi Akiyama*

*この研究の対応する著者

    研究成果: Article査読

    7 被引用数 (Scopus)

    抄録

    Several studies have revealed that the fiber distribution is usually not uniform since many parameters during the fabrication process cause different fiber distributions and orientations within individual steel fiber-reinforced concrete (SFRC) members. This phenomenon results in large scattering in the post-cracking flexural responses among the material characterization specimens. Consequently, when estimating the flexural behavior of SFRC beams, conflicting results are often obtained using only a single constitutive stress-crack opening laws to characterize the material behavior in tension without considering the different fiber distributions and orientations. In this paper, a novel integrated approach is established to estimate the flexural behavior of SFRC beams using both a finite element (FE) method and X-ray imaging. In the prediction approach, a parameter that can be determined using the measured fiber distribution properties from an X-ray image is proposed to consider the variability of the fiber dispersion in each SFRC member. A method is presented for deducing the constitutive stress-crack opening laws using an FE analysis and the proposed parameter from X-ray images. In the numerical FE method, the variability of the fiber dispersion of the individual SFRC beams is determined by identifying the stress-strain relation in each mesh based on the proposed parameter from the X-ray images. The FE method provides better prediction results of the loading capacity for the SFRC beams.

    本文言語English
    ページ(範囲)347-365
    ページ数19
    ジャーナルConstruction and Building Materials
    170
    DOI
    出版ステータスPublished - 2018 5 10

    ASJC Scopus subject areas

    • 土木構造工学
    • 建築および建設
    • 材料科学(全般)

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