Rotational stiffness and moment resistance of bolted endplate joints with hollow or CFST columns

Abstract

This paper deals with the prediction of the initial rotational stiffness and moment resistance of bolted endplate joints between I-beams and hollow or concrete filled steel tubular (CFST) columns. An extensive numerical analysis was carried out on a wide range of configurations of hollow and CFST columns subjected to transverse forces. Based on numerical simulation results, the stiffness models for the ‘column side walls in tension and compression’ and ‘column face in bending’ which is the most deformable component within a joint were proposed. The proposed models were then incorporated into the component method adopted in EC3 and EC4 to predict the initial rotational stiffness and moment re..