Circular RC Planter Wall Design

[csways_]

Hi,

Does anyone have a reference for designing circular reinforced concrete planters?

Thanks!

 

[BridgeSmith]

It's a circular tank with dirt instead of water. What are the design issues that are troubling you?

 

[KootK]

Unless the thing is monstrous and deserving of hoop/arch type behavioral analysis, I'd probably just look at the walls as cantilevers rather than trying to justify horizontal spanning action.

 

[csways_]

It's not huge and I was planning to just treat the walls and cantilevers, but I wanted to make sure I wasn't missing anything. Thanks.

 

[bridgebuster]

I did something similar a few years back; had to design a circular precast concrete ring to serve as a tree pit. I can't find the calculation but I think I treated the soil as a fluid and calculated the hoop stress.

 

[BridgeSmith]

If you can reinforce it continuous around the perimeter, no need to design it as a cantilever. Load it as a straight retaining wall and design for the hoop stress. It doesn't even need to be connected to the foundation.

 

[MotorCity]

Do a search for concrete ring walls.....same hoop stress concept mentioned above at a smaller scale

 

[BridgeSmith]

Hoop stress has no scale; it works regardless of the size of the hoop.