Study the Column's Behavior of Reinforced Concrete under Cycle Loadingbefore and after the Improvement with Polymer Fibers

Today ,the process of seismic improvement and resistance has been accelerated in our country due to this fact that most current buildings has an old and non-standard context in our country . Studying the resistance is inevitable case especially in the columns which is the most important and critical structural components . So , this study is conducted to investigation the column's behavior of reinforced concrete under cycle loading before and after the improvement with polymer fibers . In this regard , one laboratory study was used in order to modeling verification .Then , the appropriate approach was examined in order to study the .Arrangement of resistance of Polymer fibers in Abaqus finite element software with simulation with several various models . After studying the hysteresis –bar curves transformation, load-displacement curve cover – transformation , ultimate load and the contribution of polymer fibers of models was found that samples those have polymer fibers have a greater ability to more loading bearing and also , have more absorb property and more energy amortization than samples without fiber.