Load Bearing Concrete Ring Design
Load Bearing Concrete Ring Design
(OP)
I am looking for some design references for circular concrete rings. I need to determine the gravity load that rings of a certain configuration can carry. I am familiar with the ASTM reference C 478-08, but that does not really address the design approach. It just seems to set forth minimum reinforcing requirements. The rings will be precast and in this situation I will be stacking about 4 ring segments on top of each other vertically to get the necessary height. Any reference suggestions?






RE: Load Bearing Concrete Ring Design
RE: Load Bearing Concrete Ring Design
RE: Load Bearing Concrete Ring Design
RE: Load Bearing Concrete Ring Design
RE: Load Bearing Concrete Ring Design
Just out of curiosity, what is the height to OD for these rings?
I would probably also check it based on wall compression requirements from ACI. But likely they will kick you back to the column compression equations.
You could break your rings into discreet elements, say 1 foot wide, and find the capacity of each element individually, assumed fully braced. THen multiply that by the number of elements.
RE: Load Bearing Concrete Ring Design
The fact that they are precast rings really doesn't change things, as long as there is no loss in strength at the joints. Are the rings connected together at all, or just sit together with some keyed interface? As long as the rings can't shift or distort relative to each other, I think you are ok.
RE: Load Bearing Concrete Ring Design
The outer diameter of the rings is 9'-6". The ring sections are 6' tall with a total stacked height of 21'. The top ring is shorter than the rest and they all have a ship-lap joint to lock the top and bottom rings together. Preliminarily I have the walls of the rings as 9" thick.
Would you consider the 1 foot wide element fully braced in both directions or just in the direction of the adjacent elements?
~waytsh