Experimental study of squat concrete shear wall reinforced with both steel and GFRP bars under cyclic lateral loading

In this experimental paper, the influence of using both longitudinal steel and GFRP bars on squat concrete shear wall has been investigated. The main purpose of this research is to study the effect of applying a hybrid system on the failure mechanism and seismic performance of specimens. For this purpose, three cantilever shear walls in full scale under cycle lateral loading with aspect ratio 1.0 have been tested. The S-SSW specimens with longitudinal and transverse steel bars, used as reference, and the G-SSW specimens reinforced with longitudinal and transverse GFRP bars as well as the SG-SSW specimens reinforced with both longitudinal steel and GFRP bars and GFRP transverse bars were examined. The results indicated the use of the hybrid system has changed the failure mode from concrete crushing in the compression zone to bar rupture. Also, the parameters such as residual deformation, secant stiffness, energy dissipation and ductility increased in the SG-SSW compared to the G-SSW specimen.