Elastic analytical model of riveted double web angle connections in tension

Abstract

T-stubs and L-stubs loaded in tension are generally assumed to be in contact with a rigid foundation due to symmetry that influences the prying force and stiffness of these components. However, for double web angle riveted connections the angle rests on deformable beam/column web. The objective of the present paper is to take into account the effects of this deformability on the development of the contact area, the rivet forces and the tensile stiffness. For this purpose, an enhanced theory of beam in contact with a tensionless Winkler foundation is adopted in the contact and lift-off areas and the axial/bending flexibility of the rivet are also considered. The two legs of the angle are fully modelled in interaction with rivets. A numerical analysis is also developed with ANSYS in order to conduct a sensitivity study to assess the influence of the horizontal leg thickness. The analytical model determines with a good accuracy the rivet force, initial stiffness, position of the prying forces but also the shape of the contact pressure distribution.