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Concrete Compression Ring.

Concrete Compression Ring.

Concrete Compression Ring.

(OP)
I asked this in the Earth Retention Engineering Forum but its pretty quite in there.

Can anyone recommend any guidance on the design of collar beams for corrugated steel culverts. I need to design these beams to stiffen the cut ends of the culvert. I think the beam needs to be designed as a concrete compression ring. The culvert is for an underpass under a highway. It will be a twin culvert/tunnel each approximately 6.5m in diameter. The ends of the culvert will be cut to match the profile of the highway embankment, which is 7.5m above the culvert. Any compression resistance of the steel culvert will be lost at these points (Tunnel Entry & Exit points). I want to use a concrete compression ring to stiffen the structure at these points. I've worked out the compression force but need advice on the effective length and shear loads etcs. Should I use half the diameter for the design length.

I need to design these elements by hand.  

Kieran
 

RE: Concrete Compression Ring.

RE: Concrete Compression Ring.

(OP)
Thanks BA  

Kieran
 

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