Rehabilitation of Four Stories Concrete Building

A four stories concrete building has damage in most ground floor columns and it is considered unsafe for exploitation. In this paper, a method was explained and implemented to be the solution for this problem. The technique of repair consists, enclosing the existing ground floor damage column cross-section by reinforced concrete shell, contained longitudinal steel arrange around the existing column and transverse steel (stirrups) arrange along the existing column connected together by wire, and connect the additional longitudinal and transverse steel to original reinforced concrete damaged column by shear connectors. Finally covering with ordinary concrete. Reinforced concrete shell designed as compression member columns. By using this technique of repair, it can improve and increase the strength of ground floor columns to carry the applied loads with safety, more economic and accepted final look.