Cyclic Response of Steel-Strip Confined Reinforced Concrete Beam-Column Joints

Abstract

Confinement introduces deformability in reinforced concrete structural elements. The relationship of stress and strain in confined concrete is appreciably affected by the yield strength, arrangement of reinforcement and confining/ transverse reinforcement spacing. Performance of confined reinforced concrete components can be studied through their loaddisplacement response curves. Parameters such as yield strength, peak load, ultimate displacement, stiffness degradation and ductility can all be evaluated from these curves. The hinge zones of beam and columns, in reinforced concrete frames, are often well confined. However, higher ductility requirements of the system can only be met if the stress path of moment reversals occurring at the face of supports exists through the joint. The joints are often congested. An interior joint, of intermediate floor, is required to accommodate reinforcement of at least six structural components. Due to congestion it is difficult to add confining reinforcement in the joints. In this project, a proposed technique to confine beamcolumn joints using steel strips will be implemented and examined.