Multi-objective optimization of RC beams strengthened in shear with FRP

Fiber reinforced polymer (FRP) materials are continuing to show great promise for use in strengthening reinforced concrete (RC) structures. These materials are an excellent option for use as external reinforcing because of their light weight, resistance to corrosion, and high strength. FRP systems have been shown to increase the shear strength of existing concrete beams and columns by wrapping or partially wrapping the members. Orienting FRP fibers transverse to the axis of the member or perpendicular to potential shear cracks is effective in providing additional shear strength. Increasing the shear strength can also result in flexural failures, which are relatively more ductile in nature compared with shear failures. The aim of this study was to maximize shear strength and minimize the volume of FRP by genetic algorithm multi-objective MATLAB toolbox. Finally, the effect of spacing, width and thickness of FRP laminates were studied.