Connection Design Subject to Shear per AISC 360-16

How does ideCAD design steel connections subject to shear according to AISC 360-16?

Symbols

A_b: Non-threaded bolt web characteristic cross-sectional area
A_g: Gross area
A_n: Net cross-section area
A_e: Effective net cross-sectional area
A_vg: Gross area under shear stress
A_nv: Net area under shear stress
A_nt: Net area under tensile stress
A_w: Cross-section web area
C_v: Coefficient of reduction for shear buckling
d: Characteristic diameter of the stem of the bolt (the diameter of the non-threaded stem of the bolt)
d_h: Bolt hole diameter
F_nt: Characteristic tensile strength
F'_nt: Reduced characteristic tensile stress obtained by considering the shear force effect
F_nv: Characteristic shear stress strength
f_rv: The greatest shear stress in the characteristic web area of ​​the bolt
F_y: Structural steel characteristic yield strength
F_u: Structural steel characteristic tensile strength
F_yb: Bolt characteristic yield strength
F_ub: Bolt characteristic tensile strength
n_sp: Number of slip planes
s: Distance between bolt-hole centers
L_e: The distance from the center of the bolt hole to the edge of the assembled element
t: Plate thickness
R_nt: Characteristic tensile strength
R_nv: Characteristic shear strength
U_bs: A coefficient considering the spread of tensile stresses

Design Criteria Under Shear

• It is assumed that the web of the cross-section transfers all shear force.

• There is no interaction between shear force and bending moment.

Shear Strength

In stiffened and unstiffened single and double symmetric cross-sections, the characteristic shear strength in the web plane is calculated as follows:

The coefficients for the I cross-section members are determined according to the slenderness ratio:

For webs of rolled I-shaped members with

The allowable shear strength is calculated as follows:

• The design shear strength =

  LaTeX Math Inline

• The allowable shear strength =

Bearing Type Connections

• In bearing-type connections, the strength is determined according to the smallest one by checking two limit states.

• Shear failure of the bolt

• Bearing failure of the plate

i) Ovalization of bolt hole

ii) Shear failure of the plate

Open

Characteristic Tensile and Shear Strength of Bolts

• Characteristic tensile strength F_nt of bolts is determined depending on the characteristic tensile strength of bolt material, F_ub.