Dear All,
I am using a pre-engineering steel beam in my calculation. Can anybody tell me how we can calculate the welding thickness for PEB?
Thank you,
well as far as i know you cannot calculate it in staad .
if you talking of fillet weld between flange and web , you need to claculate the stress in shear ( consider resultant of Fy and F z shear force) at critical section taken in to consideration , and compare it wiht allowable stress of weld ( 0.3 x Fu of weld )
Best Regards,
Alex Immanuel Thainese
beam flange is 80*500mm and the web is 20*940mm .combined stresses at mid of the beam is 88N/mm2 .so what will be the leg size of the weld?
as mentioned earlier , you need to only consider stress due to shear . combined stress should not be used for weld check .
choose a weld leg size and calculate tau
stress due to shear - tau = F Ay / (Izz x b)
F = shear force on the section = sqrt ( Fy2 + Fz 2)
Fy & Fz = shear stress on the crossection along axis parallel to web and perpendicular to web )
A y = (topFlangeWidth*topFlangeThickness*(webDepth/2+topFlangeThickness/2))
b = 0.707 x weld leg size
this tau < = 0.3 Fu ( as per AISC)
Fu = ultimate stregnth of weld electrode .
hope it is clear .