Combined tension and shear stresses are of concern principally for fasteners, plate-girder webs, and ends of coped beams, gusset plates, and similar locations.
Tension and Shear in Bolts
The AISC ‘‘Load and Resistance Factor Design (LRFD) Specification for Structural Steel Buildings’’ contains interaction formulas for design of bolts subject to combined tension and shear in bearing-type connections. The specification stipulates that the tension stress applied by factored loads must not exceed the design tension stress Ft (ksi) computed from the appropriate formula (Table 6.24) when the applied shear stress ƒv (ksi) is caused by the same factored loads. This shear stress must not exceed the design shear strength.
For bolts in slip-critical connections designed by LRFD for factored loads, the design slip resistance @Rstr (kips) for shear alone given in Art. 6.14.2 must be multiplied by the
Tension and Shear in Girder Webs
In plate girders designed for tension-field action, the interaction of bending and shear must be considered. Rules for considering this effect are given in the AISC LRFD and ASD Specifications.
This is a failure mode that may occur at the ends of coped beams, in gusset plates, and in similar locations. It is a tearing failure mode involving shear rupture along one path, such as through a line of bolt holes, and tensile rupture along a perpendicular line.