Normal bolts

The design shear resistance of a connection is calculated according to EN 1993-1-8 Art 6.2.2.

As it is described in EN 1993-1-8 Art 6.2.2 (2), the contribution of each bolt is dependent on the fact, whether the bolt should resist the tension or not. Each bolt contributes with:

• the total design shear resistance of the bolt if bolt is not required to resist any tension
• 0.4/1.4 of the total design shear resistance of the bolt if bolt is required to resist also tension (interaction does not apply to anchor bolts in column base connections)

The design shear force resistance of a joint V_z,Rd is then calculated as:

with:

Fv,Rd	design shear resistance of a bolt calculated according to EN 1993-1-8 Art 3.6.1 Table 3.4
nt	number of bolts which are also required to resist tension
nn	number of bolts which are not required to resist tension

The design bearing resistance of a joint F_b,Rd of a bolt is calculated according to EN 1993-1-8 Art 3.6.1 Table 3.4 separately for each relevant component:

• the bearing resistance for endplate F_b,ep,Rd
• the bearing resistance for column flange F_b,fc,Rd

with:

ntot	total number of bolts

The final design shear force resistance of a joint V_z,Rd is taken as minimum of design shear force resistance and the design bearing resistance of a joint.

For further info on calculation of shear force resistance of a normal bolt see chapter: "Normal bolts".

For further info on the calculation of shear force resistance for connection with 4 bolts per row see the chapter: "Bolt-rows with 4 bolts".