Flexure‐axial‐shear interaction of ductile beams with single‐crack plastic hinge behaviour

One of the key damage observations in modern reinforced concrete (RC) frame buildings, damaged following 2010/2011 Canterbury and 2016 Kaikoura earthquakes, was localised cracking at beam-column interface capacity-designed beams. The beams due to curtailed longitudinal bars interface. Following these observations, without experimental data justify desirable seismic performance, controlled by were assumed be potentially earthquake-vulnerable. To address this, an program carried out on six RC beam specimens susceptible single-crack plastic hinge behaviour bars. show that with can undergo significant inelastic drift demands loss lateral resistance. However, contrary conventional distributed cracking, response is mainly dominated rotation (via bond-slip) shear sliding column face. current paper studies interdependence axial elongation, bond-slip deformation under cyclic demands. A procedure for assessment proposed. proposed formulations adopted develop adequate numerical models simulating frames