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

Weiwei Lin, Nozomu Taniguchi, Teruhiko Yoda

    Research output: Contribution to journalArticle

    4 Citations (Scopus)

    Abstract

    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.

    Original languageEnglish
    Pages (from-to)357-368
    Number of pages12
    JournalJournal of Constructional Steel Research
    Volume138
    DOIs
    Publication statusPublished - 2017 Nov 1

    Keywords

    • Corrosion
    • Major axis
    • Minor axis
    • Preventive maintenance
    • Service life
    • Steel column

    ASJC Scopus subject areas

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

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