square pipe

[alexela]

Hello!

I usually take care of the logistic part of an project. Now I have been asked to give an aproximatelly dimensions for a square pipe ( made it by welding four plates )which will be vertically mounted, and on it's lower part will act the following loading:
- an axial force ( weight),
- shear force
- a bending moment.
I have no problem on checinkg the (pipe) section, but I can't remember how could be calculated the welding.

Can you plase help me?

Thank you!

 

[StephenA]

The horizontal shear force H at the weld between say a web and a flange due to bending / shear is given by:

H=Say/I

S is the shear force at the cross section
a is the area of the overall section outside the section being considered i.e. the flange
y is the distance from the neutral axis to the centre of area a.


The result is in (metric units) kN/mm which can be equated to a weld size.

StephenA