Rehabilitation of existing buildings and structures to resist seismic acts

This research aimed to explain a set of concepts that reduce the seismic hazard of existing buildings and structures by clarifying the philosophy of earthquake-resistant design, and to clarify the descriptive or detailed descriptive methods adopted in references and codes. The researcher has used the descriptive approach to achieve the objectives of the study. This approach is based on reference to studies, articles and books related to the current subject to achieve the objectives of the study. The research concluded that there are many methods used in strengthening existing buildings and installations in earthquake-prone areas. The most important of these methods are making the necessary corrections related to the general structural configuration such as reducing the wicks by removing and adding the cutters, and reducing the vertical order by adding structural walls and repairing the shear in the structural elements by reinforcing the columns by adding steel shirts or layers of pure concrete.