Bolted Connections Introduction | Design of Steel Structures

Design of Bolted Connections * Assumption in design of bearing bolted connections: 1. The friction between the plates is negligible. 2. Shear is uniform over the cross section of the bolt 3. The stress distribution between bolt holes is uniform 4. Bolts in a group subjected to direct loads share the load equally. Principles observed in design: 1. The centre of gravity of bolts should coincide with the centre of gravity of connected members. 2. The length to connection should be as small as possible. * Design tensile strength of a joint is least of the following: 1. Tensile strength of plate where gmc = partial safety factor = 1.25 fu = ultimate stress An = net area of the plate where h = width of plate t = thickness of thinner plate do = diameter of bolt hole g = gauge length Ps = staggered pitch n = number of bolt holes at critical section 2. Shear capacity of bolts where fub = ultimate tensile strength of bolt nn = number of shear planes with threads ns = number of shear planes with ...