Abstract
In the present experimental study, the effect of spiral transverse bars on failure mode and structural behavior of concrete shear walls reinforced with GFRP bars was investigated. Six full-scale shear walls in two aspect ratios (1.08 and 1.75) were tested under constant axial load and cyclic lateral loading. Two specimens were reinforced with longitudinal and transverse steel bars (SRCW1.08 and SRCW1.75), two specimens reinforced with longitudinal and transverse GFRP bars (GRCW1.08 and GRCW1.75), and two specimens reinforced with longitudinal and spiral transverse GFRP bars (S-GRCW1.08 and S-GRCW1.75) were investigated. The experimental results indicate that the spiral transverse bars at two aspect ratios of specimens led to an increase in shear capacity, ultimate lateral displacement, and a change in the failure mode from compression failure to rupture of longitudinal bars in shear walls reinforced with GFRP bars. Comparing GRCW1.08, S-GRCW1.08, and GRCW1.75 with S-GRCW1.75 indicated that parameters such as ultimate lateral loading 23.1 and 9.2%, ultimate lateral displacement 20.1 and 20.4%, cumulative dissipation energy 48.7 and 54.8%, and displacement ductility ratio 18.6 and 20.2% were increased.
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