Longeron splice connection
Longeron splice connection
(OP)
Hi all
I have a longeron which is going to splitted and joined together with bolts like in the picture below.
i extracted the forces from gfem model. I have Fx, Fy, Fz and Mx, My, Mz.
My question is , how should i distrubute forces on bolts?
I think the forces along x direction acting as shear forces on the web and shear forces on the cap.
the forces alond z direction acting as shear forces on the web and tension forces on the caps.
the forces along y direction acting as shear forces on the cap and tension forces on the web.
MX acting shear on the cap and tension on web.
MY action shear on both web and caps.
MZ acting shear on caps and tension on web
Do you think my way correct?
I have a longeron which is going to splitted and joined together with bolts like in the picture below.
i extracted the forces from gfem model. I have Fx, Fy, Fz and Mx, My, Mz.
My question is , how should i distrubute forces on bolts?
I think the forces along x direction acting as shear forces on the web and shear forces on the cap.
the forces alond z direction acting as shear forces on the web and tension forces on the caps.
the forces along y direction acting as shear forces on the cap and tension forces on the web.
MX acting shear on the cap and tension on web.
MY action shear on both web and caps.
MZ acting shear on caps and tension on web
Do you think my way correct?

RE: Longeron splice connection
next primary load Fx ... apply over all 6 rivets, or 4 cap rivets, or 2 web rivets !!??
Next primary load, Mz ... this is a couple between the inner and outer finger splices. The splice is H inches high (between the finger straps), then load into caps is Mz/H over 2 rivets.
Fy, Mx and My should be small, and out-of-plane ... neglect or apply to skin rivets.
But better is to look up how your company wants you to analyze splices (rather than listening to some guy on the internet).
another day in paradise, or is paradise one day closer ?
RE: Longeron splice connection
RE: Longeron splice connection
If you were to compare the relative stiffness of those two loadpaths (in-plane shear vs out-of-plane tension) you'd find those joints to be an order of magnitude (or more) softer out-of-plane, compared to in-plane. Hence why fastener tensile loading is often considered neglible when idealising structures.
In summary, think about relative stiffneses. Loads follow the stiffest loadpath. So you shouldn't expect any significant load to be carried by fastener tension when there's an adequate shear connection available.
RE: Longeron splice connection
Thanks for all answers. As far as i understand from your answer.
I have to solve the problem with in plane loads.All the fasteners should carry the shear loads. Am i right?