Weld group capacity (elastic method)

Output:

Definitions
• ϕ_w = Resistance factor for welds
• M_u = Factored moment (kip*ft)
• N_u = Axial load; Tension positive (kip)
• T_u = Factored torsional moment (kip-ft)
• V_u = Factored shear force (kip)
• b = weld group width (in)
• d = weld group depth, height, or diameter (in)
• r = distance from centroid to weld, for calculating torsion stress (in)
• f_Ru = resultant stress (kip / in)
Calculate the geometric properties of the weld group
• y_c = d / 2 = 12 in
• J = (b+d)³ / 6 = 7776 in³
• S_cx = bd + d²/3 = 480 in²
• A_w = 2d + 2b = 72 in
• r_max = Sqrt((b/2)²+(d/2)²) = 13.416 in
Calculate the unit stress from each applied load
• f_Pu = N_u/A_w = 0 kip / 72 in = 0 kip/in
• f_Vu = V_u/A_w = 0 kip / 72 in = 0 kip/in
• f_Mu = M_u/S_xx = 0 kip-in / 480 in² = 0 kip/in
• f_Tu,max = T_u r_max / J = 0 kip-in / 7776 in² = 0 kip/in
Calculate the peak resultant stress using vector combination
• Note: fTu added to fVu (assumed to act in same direction)
• f_Ru = sqrt([f_Pu + f_Mu]² + [f_Vu + f_Tu]² ) = 0
Calculate the required weld size
• Use weld with strength of 0 kip/in
User Notes:
User notes