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The behavior of the reinforced concrete material can be modified by adding a percentage of glass fibers which depend on their characteristics such as type, shape, volume, or weight content. These fibers are characterized by high tensile strength, perfect elasticity, high tightness, good thermal stability and thermal insulation. In this paper, the behavior of glass fiber reinforced concrete (GFRC) columns with varying glass fiber volume content (1 and 1.5%) under elevated temperatures and axial compressive loading is numerically studied in order to evaluate the effect of adding glass fibers on the behavior of RC columns under elevated temperatures. A reinforced concrete (RC) column without fibers is used as a control sample. The study is carried out using the ANSYS software where the temperatures due to the fire are applied according to the standard ISO834 fire model. In evaluating the fire behavior of the columns, geometric and material nonlinearities are considered. The results show when glass fiber is added to reinforced column, the load carrying capacity and displacement of reinforced column increase. Adding glass fibers to reinforced concrete columns provides better protection to rebar under elevated temperatures. The percentages of decreasing the ultimate load under elevated temperature were considerably less in GFRC columns compared to that in RC columns. |
