A preventive strengthening method for steel columns: Experimental study and numerical analyses

Weiwei Lin, Nozomu Taniguchi, Teruhiko Yoda

    研究成果: Article

    4 引用 (Scopus)

    抄録

    Techniques for structural repair and maintenance are becoming increasingly important because of increasing problems associated with aging structures. This paper introduces a method for strengthening aged steel columns by using new construction materials such as glass-fiber-reinforced polymer (GFRP) plates, rapid-hardening concrete, rubber-latex mortar, and reinforcing bars. The purpose of the present study is to investigate the mechanical performance of steel columns before and after strengthening, thereby assessing the effectiveness of the proposed strengthening method. Depending on the possible directions of applied load (major axis or minor axis) and the corrosion conditions, three specimens were employed in the loading tests. Static loading tests were performed on steel columns with and without strengthening. Test results, including load–deflection relationships and the strain development process of the columns, were measured and compared between the original and strengthened columns. Moreover, three-dimensional finite-element models were built to compare the strengthened and original steel columns. Both the experimental and numerical results indicate that the proposed strengthening method can significantly enhance the stiffness in the elastic stage and the load-carrying capacities in the plastic stage, resulting in significant extension of residual service life under real service conditions and improvement of seismic performance during earthquakes.

    元の言語English
    ページ(範囲)357-368
    ページ数12
    ジャーナルJournal of Constructional Steel Research
    138
    DOI
    出版物ステータスPublished - 2017 11 1

    Fingerprint

    Steel
    Rubber
    Load limits
    Mortar
    Latexes
    Service life
    Glass fibers
    Hardening
    Earthquakes
    Polymers
    Repair
    Aging of materials
    Stiffness
    Concretes
    Corrosion
    Plastics

    ASJC Scopus subject areas

    • Civil and Structural Engineering
    • Building and Construction
    • Mechanics of Materials
    • Metals and Alloys

    これを引用

    A preventive strengthening method for steel columns : Experimental study and numerical analyses. / Lin, Weiwei; Taniguchi, Nozomu; Yoda, Teruhiko.

    :: Journal of Constructional Steel Research, 巻 138, 01.11.2017, p. 357-368.

    研究成果: Article

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    KW - Minor axis

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    KW - Service life

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