Moment Connection when Minor axis bending is large 8

[NewbieInSE]

Dear Engineers,

I have got a Beam Splice to design, which has both major and minor Bending Moment (BM). Major BM is 138 kN-m (102 kip-ft), Minor is 30kN-m (22 kip-ft). Please see the snapshot below.

It is taken from RAM Connection Program. The minor BM has been included in the program, but it used only the Major BM.

What I want to know is, the weld shown here for Major BM design, will it be adequate for Minor BM too? or Does it require further checks?

Thanks.

 

[r13]

You are welcome.

 

[dik]

who knows, maybe there is a good reason for it.

I seem to recall that there is some evidence of a triaxial stress state induced.

Dik

 

[dik]

I still have my '66 edition and I occasionally still use it... at the time, it was cheaper than dirt... like $10 or so if memory serves... about $1/lb. Only thing I missed was an index. Likely someone has put together a *.pdf file index over the years.

Dik

 

[dik]

PROYECTOR:

Thanks... just turned this into an SMath sheet... keep up the good work.

Dik

 

[r13]

dik,

Now the book has turned to 800 some pages monster... don't know how much has added in though.

 

[BAretired]

It is an amazing book, and you can download all 837 pages on the internet in pdf format.

BA

 

[dik]

Even the page numbers do not make it easy to determine the number of pages... With the *.pdf, at least you have a good idea...

Dik

 

[dik]

I was going to order a couple of the books on Weld design from the foundation... but the shipping cost is greater than the books.

Dik

 

[KootK]

I've got them all. You'll find that much of the material is repeated unless you're looking at doing axles, machine bases etc.

 

[SethGuthrie]

By the way, in Ram Connection the column splice welded flange plate connection can be used to check for minor axis moments so you can turn ths problem on its side to get the relevant weld and plate bending checks.

 

[Arun4567777]

@BAretired and retired13 Sorry I am replyimg late. Now I get it why it will not be a couple.I was thinking about it in a difgerent way.
Btw how Vy(Minor) will be 0.If a minor axis moment is applied on the flange then Vy will be generated as the ends of the beam connection will have to resist this moment. Also shear forces will come in flanges due to this Vy plus the major axis moment plus the axial due to minor axis bending.
As u said it is not a good practice to weld across a beam.But can you please explain in case of Vy ,the shear force that will develop in the flange will be in the form of couple.If we provide one side weld it has to resist both the couple.Otherwise I can weld across the flange amd my one couple will be resisted by both the welds.

 

[BAretired]

@Sammy345,
V_y was not specified in the first post, so I assumed it to be negligible. If V_y is not zero, M_y is increased by approximately Vy*200. This would increase the weld force parallel to the beam, and in addition, would create a force normal to each weld of approximately Vy/4 in each half of each plate.

BA