Designing and detailing transverse reinforcement to control bar buckling in rectangular RC walls

Bar buckling in RC structures is a commonly-observed failure mode that adversely affects their deformation capacity. To restrict bar ductile walls, design codes only emphasises on restricting the spacing of transverse reinforcement and does not recognise importance effective stiffness ties (which combination tie leg axial spacing) to buckling. Therefore, this paper requirements for anti-buckling are summarised, improvements current methodology proposed. ensure detailing plastic hinge regions adequate single compressive stress deterioration bars due controlled, refinements procedures The restraining ability depends legs, while reduction reinforcing unsupported length (in bare tests) or can include multiple (inside members). restrictions both legs along longitudinal controlled by ensuring direction potential well below critical evaluated using mechanics-based approach. Additionally, degradation limiting ratio diameter such any carried at curvature recommended New Zealand Concrete Standard within an acceptable range. Furthermore, recommendations avoid unrestrained boundary zone wall web Using proposed methodology, walls be delayed detrimental effects lateral response until drift demands met.