Alaa Hassan Abd Al-Khammasy

Using of new technique to reinforce concrete structures is needed to improve their strength against unexpected loads such as earthquake. The Computer Numerical Control (CNC) technique is one of the modern ways to configure the steel plate in any desired shape. RC shear wall is one of the important structural elements in the buildings. Reinforcing of concrete shear wall by embedded CNC steel plate instead of steel bars has been proposed in this study under cyclic loading. To implement the investigation of the new technique of reinforcement, a numerical simulation of the concrete shear wall specimen reinforced with ordinary steel bars under cyclic loading combined with vertical uniaxial load has been adopted from previous literatures. The numerical results have been verified with a selected experimental case results in term of hysteresis behaviour of the RC wall model. Then, the comparison in seismic behaviour of the ordinary and the proposed reinforcement technique of concrete shear wall model has been exhibited. Furthermore, three varied parameters have been inspected to explain the efficiency of the new technique. The parametric study includes reducing the thickness of steel CNC plate, cyclic loading path and steel yield strength. The results show significant enhancement of concrete wall strength by increasing the ultimate loading capacity when using embedded steel CNC plate technique by 173% with appropriate energy dissipation capacity. The new technique could be alternative process than traditional ways in the precast building construction industries to correspond the modern method of robot-based construction, as well to reduce the cost