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Steel and Composite Structures
  Volume 30, Number 1, January10 2019 , pages 69-79

Strengthening of deficient steel SHS columns under axial compressive loads using CFRP
Mehdi Shahraki, Mohammad Reza Sohrabi, Gholamreza Azizyan and Kambiz Narmashiri

    Numerous problems have always vexed engineers with buckling, corrosion, bending, and over-loading in damaged steel structures. The present study aims to study the possible effects of Carbon Fiber Reinforced Polymer (CFRP) for strengthening deficient Steel Square Hollow Section (SHS) columns. To this end, the effects of axial loading, stiffness values, axial displacement, the shape of deficient on the length of steel SHS columns were evaluated based on a detailed parametric study. Ten specimens were tested to failure under axial compression in laboratory and simulated by using Finite Element (FE) analysis based on numerical approach. The results indicated that the application of CFRP sheets resulted in reducing stress in the damage location and preventing or retarding local deformation around the deficiency location appropriately. In addition, the retrofitting method could increase loading the carrying capacity of specimens.
Key Words
    Square Hollow Section (SHS); deficiency; CFRP; steel column; strengthening
(1) Mehdi Shahraki, Mohammad Reza Sohrabi, Gholamreza Azizyan:
Department of Civil Engineering, University of Sistan and Baluchestan, Zahedan, Iran;
(2) Kambiz Narmashiri:
Department of Civil Engineering, Zahedan Branch, Islamic Azad University, Zahedan, Iran.

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