Post tensioned slab ramps
Post tensioned slab ramps
(OP)
I am looking at a split level post tensioned carpark that has transitional ramps between levels, and I was wondering how the ramps are built. Ramps are 20% grade with 10% transitions top and bottom. Ramp span are about 8.5m. Was thinking of Corbel joint at base of ramp to lower level.
I was thinking drape the PT cables down from the upper level and stress from the top down? Are there issues with the ramp wanting to lift up as a result of stressing (ie. cable straightening) if I have a just a corbel joint (not doweled) at the base of the ramp?
Am I better of considering a RC ramp instead? 8.5m span seems bit large for RC - would probably need a mis span support.
I was thinking drape the PT cables down from the upper level and stress from the top down? Are there issues with the ramp wanting to lift up as a result of stressing (ie. cable straightening) if I have a just a corbel joint (not doweled) at the base of the ramp?
Am I better of considering a RC ramp instead? 8.5m span seems bit large for RC - would probably need a mis span support.





RE: Post tensioned slab ramps
Draw all (and I mean ALL, not just the uplift from the parabolic profile) of the forces that are imparted by the prestress and then you will be able to see what is happening.
RE: Post tensioned slab ramps
Dik
RE: Post tensioned slab ramps
Dik
RE: Post tensioned slab ramps
RE: Post tensioned slab ramps
What did you learn from the picture? It illustrates the complete lack of knowledge of several things, but is not pertinent to the OP's question.
RE: Post tensioned slab ramps
Dik