Grout/Concrete-filled pipe legs

[DataAB]

I am looking for information regarding calculation of the compressive capacity of grout-filled pipe legs for a self-support communication tower.

The design info I have (from CSA S16.1) appears to be largely empirically derived. I feel like I'm simply plugging in numbers. Is there an accepted design approach that involves transforming the grout/concrete into steel? Does anyone have experience with this?

Any comments would be appreciated.

 

[dgkhan]

I am not sure if this is what you are looking for but AISC latest edition first time addresses composite members in compression (hss filled with concrete) I am in Canada too. Nothing in Canada yet, to my knowledge.
Check with University of Toronto Professor Michael P. Collins. He is the candian genius for concrete etc.

 

[ishvaaag]

You have at the AISC's steelTools site Mathcad worksheets that considers the infilled pipe case, are according to the older LRFD 1993 code but can say where you are respect your intent. The strength of structures doesn't vary at the same speed than the codes, some should remember.

http://www.steeltools.org/STEELTOOL...umentKey=e3014764-aa27-45f6-96f2-111fe0863933

You will need Mathcad 2000 or newer.

 

[Splitrings]

The Manual of Steel Construction, LRFD Third Edition, tables 4-12 through 4-15 list both compression and bending capacities for HSS & Pipe filled with concrete.