The full bearing resistance on the 10.8 mm web is į b,max,Rd = × 10 -3 = 212.54 kN Four lines of 2 bolts at a convenient spacing may be used.įor the web splice, consider one or two lines of 4 bolts on either side of the centreline. This is much greater than the resistance of the bolt in single shear, and thus the spacings do not need to be such as to maximise the bearing distance. The full bearing resistance of an M24 bolt in a 20 mm cover plate (without reduction for spacing and edge distance) is į b,max,Rd = × 10 -3 = 393.6 kN The force in each flange due to bending is therefore given by į f,M,Ed = 0.842 × × 10 -3 = 989 kNįor the flanges, the force of 1005.53 kN at ULS can be provided by 8 M24 bolts in single shear. Therefore, the web will carry 51.462/129 = 39.8% of the axial force in the beam, wile the flange will carry the remaining 60.1%. Therefore the web will carry 9737/61500 = 15.8% of the moment in the beam (assuming an elastic stress distribution), while the flange will carry the remaining 84.2%. Γ m2 = 1.25 (bolts, welds, plates in bearing)įor a splice in flexural member, the parts subject to shear (the web cover plates) must carry, in addition to the shear force and moment due to the eccentricity of the centroids of the bolt groups on each side, the proportion of moment carried by the web, without any shedding to the flanges.
Partial Factors for Resistance (BS EN 1993-1- NA.2.15) Nominal ultimate strength f ub = 800 N/mm 2
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