Haunch Thickness Calculations
Haunch Thickness Calculations
(OP)
I am designing a prestressed concrete bridge, and have a question regarding the haunch thickness. The haunch should account for cross slope and vertical curve camber, but what Dead Load Deflection should be used?
It seems that non-composite and composite deflections should be accounted for to achieve the proper deck elevations when all is said and done, however I have been reading that only non-composite deflections are considered. Why is this?
Thanks!
It seems that non-composite and composite deflections should be accounted for to achieve the proper deck elevations when all is said and done, however I have been reading that only non-composite deflections are considered. Why is this?
Thanks!






RE: Haunch Thickness Calculations
If you're in the US, check your state DOT standards as to how they calculate the haunch height. There's aslo an AASHTO/NSBA publication on the subject (personallly, I think it's too cumbersome).
RE: Haunch Thickness Calculations
I've seen several DOT's examples of haunch calculations that are considering slab deflections only, and not superimposed dead loads once the deck is poured. It seems that these composite load deflections should also be accounted for in the haunch in order to set the deck higher than the actual deck elevations.
RE: Haunch Thickness Calculations
In NY we include the SDL.
http://www.aisc.org/contentNSBA.aspx?id=20130