Abstract: Columns are considered one of the most important structural elements in buildings; they transfer the load directly to the foundations. thus, their exposure to any variables or any extreme conditions such as fire may cause the collapse of the building as a result of buckling of columns.
The main objectives of this research are to investigate the effect of using the steel fiber reinforcing polymer on the strengthening of circular R.C Columns after exposure to fire. In the experimental program, the volume fraction of steel fiber, strengthening FRP area and method of Strengthening using FRP on the specimens varied in order to determine the effect of these variables on the specimen strength and axial displacement.
The experimental program consists of ten reinforced concrete short columns. A column was tested as a control column without steel fiber and without fire, nine columns with different percentages of steel fiber in the mix (0, 0.5%, 1.0%, and 1.5%) by weight, three specimens of the nine were tested only without fire, and six specimens were exposed to fire. then the columns were strengthened with glass fiber with strip of width (100mm, 200mm) respectively.
Experimental results indicated that adding steel fiber by different volume fractions increased the load carrying capacity of the reinforced concrete columns.
Keywords: FRP, axial displacement, steel fiber.
Title: Strengthening of Circular Reinforced Concrete Columns with Steel Fiber Added to the Mix after Fire Exposure
Author: Nasr Z. Hassan, Mostafa A. Osman, Doaa Y. Mohammed
International Journal of Engineering Research and Reviews
ISSN 2348-697X (Online)
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