Numerical comparison of concrete columns strengthened with layer of fiber concrete and reinforced concrete

Concrete structures that are influenced by degradation, overloading, the thawing and freezing cycles, abrasive damage, corrosion of reinforced bars, should be repaired or strengthened. Each of those mentioned influences lead to decreasing the load-carrying capacity of the structure or its member. The damaged structure stops to fulfil the serviceability limit states (SLS) and ultimate limit states (ULS). For this reason, the structure has to be strengthened to increase the load-carrying capacity and elongation of remaining lifetime. One of new method for strengthening vertical members (columns of frame structures) is the using fiber concrete layer and utilization its increased tensile strength in comparison to common concrete.