Past and recent seismic events have highlighted undesirable brittle failure in RC frame structures, indicating that a substantial damage may result from beam-column joints in non-seismically designed buildings. This paper presents a numerical investigation on exterior RC joints under seismic loading based on a macro-modelling approach, which employs the “scissors model” to schematize the shear behavior of the joint and the bond-slip of the longitudinal steel rebars at the beam-joint interface. A set of literature experimental tests have been used to develop a model for the estimate of the maximum shear strength and a new multi-linear shear stress-strain law of the joint element. Cyclic analyses have been also performed by implementing the “pinching4” material parameters available in OpenSees, governing the hysteresis rules and pinching effect.
Numerical Modeling of the Monotonic and Cyclic Behavior of Exterior RC Beam-Column Joints
Napoli A.Membro del Collaboration Group
;Realfonzo R.Membro del Collaboration Group
2024-01-01
Abstract
Past and recent seismic events have highlighted undesirable brittle failure in RC frame structures, indicating that a substantial damage may result from beam-column joints in non-seismically designed buildings. This paper presents a numerical investigation on exterior RC joints under seismic loading based on a macro-modelling approach, which employs the “scissors model” to schematize the shear behavior of the joint and the bond-slip of the longitudinal steel rebars at the beam-joint interface. A set of literature experimental tests have been used to develop a model for the estimate of the maximum shear strength and a new multi-linear shear stress-strain law of the joint element. Cyclic analyses have been also performed by implementing the “pinching4” material parameters available in OpenSees, governing the hysteresis rules and pinching effect.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
