Bolted Connection

510.4 Affected Elements of Members and Connecting Elements

This section applies to elements of members at connections and connecting elements, such as plates, gussets, angles, and brackets.

510.4.1 Strength of Elements in Tension

The design strength, øR_n and the allowable strength, R_n/ Ω, of affected and connecting elements loaded in tension shall be the lower value obtained according to the limit states of tensile yielding and tensile rupture.

1. For tensile yielding of connecting elements:

2. For tensile rupture of connecting elements:

510.4.2 Strength of Elements in Shear

The available shear yield strength of affected and connecting elements in shear shall be the lower value obtained according to the limit states of shear yielding and shear rupture:

1. For shear yielding of the element:

2. For shear rupture of the element:

where:

A_nv = net area subject to shear, mm²

510.4.3 Block Shear Strength

The available strength for the limit state of block shear rupture along a shear failure path or path(s) and a perpendicular tension failure path shall be taken as

where:

A_gv = gross area subject to shear, mm²

A_nt = net area subject to tension, mm²

A_nv = net area subject to shear, mm²

Where the tension stress is uniform, U_bs = 1; where the tension stress is nonuniform, U_bs = 0. 5.

User Note: The cases where U_bs must be taken equal to 0.5.

The available strength of connecting elements in compression for the limit states of yielding and buckling shall be determined as follows.

For KL/r ≤ 25

For KL/r > 25 the provisions of Section 505 apply.

510.7 Bearing Strength

The design strength, øR_n and the allowable strength, R_n/ Ω, of surfaces in contact shall be determined for the limit state of bearing (local compressive yielding) as follows: