Prediction of the yielding moment of flush endplate splice connections using finite element modeling

This paper presents the results of parametric analyses of the yielding moment (MyMy) of Bolted Flush Endplate Beam (BFEB) splice connections using Finite Element Modeling (FEM) tools. The connection components were modeled using three-dimensional brick elements, while contact between the endplates was modeled using Coulomb friction. Materials for beam, endplate and bolts were considered to behave non-linearly. Finite element results with three experimental and numerical studies were compared, and all indicated good agreement, which is also briefly reviewed in this paper. Using verified FEM, fairly large parametric studies, based on the practical configuration of BFEB connections, were carried out to investigate the yielding moments with variations in size of beam flange, beam web, thickness of endplate, and diameter, as well as vertical and horizontal pitch, of bolts. Finally, the investigation results are summarized to access the prediction equations for MyMy as functions of geometric variables of the BFEB connections. Due to the multitude of influencing parameters, the objective parameters have been normalized by using the prediction of theoretical models, which is established upon the component method presented. The method for accuracy in predicting values, regarding the MyMy of a BFEB connection, is also discussed.