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

    研究成果: Article

    3 引用 (Scopus)

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    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.

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

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    ASJC Scopus subject areas

    • Civil and Structural Engineering
    • Building and Construction
    • Materials Science(all)

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