Tensile resistance of splice

[kari_rinne]

Can someone please clarify this to me. I don't really understand how the tensile resistance with a 36,36mm thick end plate can be so low. So the bolt goes through the plate? Is the only thing affecting it the thickness and material of the plate? I attached a pic- In the pic the end plate is 36,36mm thick and it still doesn't have enough resistance.

Also for some reason I can't attach the model

[Simau]

@kari_rinne 

Zip your model before attaching

[HoshangMustafa]

Hi @kari_rinne 

Is it 36,36mm or 35,32mm? It's confusing somehow.

[kari_rinne]

Let's see if it works this way

[kari_rinne]

It is 36,36mm. I don't really even know what the t max in the picture is supposed to be. Also in the model the connection is number 41

[Simau]

@kari_rinne 

Try with this configuration

Model attached

[kari_rinne]

Unfortunately that kind of a connection won't fit there. Anyway I was wondering more about what causes this. I've never had a problem with plates that are 30mm thick previously. A thing that crossed my mind is whether this is an error in the code in Robot. But maybe someone with more engineering knowledge than me can explain it to me.

[Simau]

@kari_rinne 

[DennisVDijk · Accepted solution]

hello kari_rinne,

If I follow the formula from EC3-1-8 your endplates are to thin with a steak of 260mm for the bolts. When endplate are to thin the prying forces will increase a lot, due to the bending resistance of the endplate. If you make your endplates 40mm you get a UC = 0.97 < 1,0:

I made a model of the connection in IDEA to show the prying forses:

Model 1, endplate 30mm S355:

prying forces: Ft,bolt = 271kN - (1055kN/6) = 96kN/bolt (extra)

Model 2: endplates 40mm, S355

prying forces: Ft,bolt = 181kN - (1055kN/6) = 6kN/bolt (extra)

I hope this will help you with your design.