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Comparative Study of Seismic Response of Short Columns Retrofitted by Steel Jacket, brick wall and FRP Fiber

Using inter-frame walls sometimes leads to the structure fortification in time of earthquake, but sometimes leads to plastic joint in the column which leads to the structure destruction. Therefore, the purpose of this work is to study and retrofit columns of inter-frame walls of deficient two-story structure, where he was taken in this research four models (Simple, With brick, With FRP, With Steel Jacket). In this work we look for the best retrofitting state of columns of half inter-frame wall by different states of retrofitting including FRP fibers and steel jackets. The analytical method used in this research is nonlinear elastic analysis by ABAQUS Software program. The results were extracted for the shear force with respect to the displacement of the static loads, and the displacement with respect to time was also extracted into the live loads of the four models. It was found that the presence of retrofitting of short shafts using steel jacket and FRP leads to a 3-40% increase in concrete bending framework in the section of shear strength and earthquake resistance.