Concrete hinge or pin

[aalmasri]

Hi all
Did anybody here construct concrete hinge or pin, in frames or in concrete tanks? Including using elastic pads? It will be great if real pictures can be shared. I know it's not common, and when searched for, mostly sketches from textbooks come up.
Thanks in advacnce

 

[LittleWheels]

I've not designed concrete hinges in frames or tanks but about two decades ago, I had some intensive investigation and analysis work with reinforced concrete deck hinges in bridges built in the 1960-70s. They are known as Freyssinet hinges, which is not strictly correct. Freyssinet hinges rely on very large compressive forces to support shear loads but these deck hinges can be in tension (temperature effects and abutment settlement) and so rely on the diagonal reinforcing bars to carry live and dead loads. It was more accurate to describe them as Mesnager hinges. The design was problematic because of deicing salt corroding the hinge rebar.

The investigation involved radiography and acoustic emission NDT, localised breakout and strain-gauging of rebar, amongst some significant desktop structural analysis. I don't have any photos from that time.

https://www.standardsforhighways.co.uk/tses/attachments/9305895c-ccce-4e9e-889b-b1d9dcffd25b?inline=true