Finite element modelling of blind bolted composite joints

• A detailed FE model was developed for blind bolted endplate composite joints.
• All joint components were separately modelled using shell, solid and truss elements.
• The present FE model predicts accurately both moment–rotation responses and failure modes of joints.
• An analytical model for predicting the moment–rotation response of composite joints was also proposed.
• Parametric studies were carried out to examine the effects of different types of blind bolts and column sections.

This paper aims to develop a detailed three-dimensional finite element model to study the behaviour of blind bolted endplate composite joints that connect composite beams to a concrete filled steel tubular column. All connection components such as steel beam, profiled sheeting, shear stud, endplate, blind bolt, concrete infill, concrete slab, hollow steel column and reinforcing bars were separately modelled using shell, solid and truss elements. The obtained predictions of the moment–rotation curve and failure mode were compared with experimental results and a very good agreement was established. In addition, an analytical model for predicting the moment–rotation response of composite joints up to failure was also presented based on the component method. Finally, extensive parametric studies were carried out to investigate the influences of shear studs and reinforcement ratio, blind bolt types and diameters, column sections and thickness ratios on the joint performance.