Tilt Up Panel Computations (Green Book Method)

[civeng80]

I'm in the process of preparing a spreadsheet on concrete tilt panel computations. I wonder if anyone has information and examples on the Green Book (iterative) method of Design. I have an Australian reference text and it is Reinforced Concrete The Designers Handbook by Beletich, Hymas, Reid and Uno, but finding it somewhat confusing.

 

[Budding_SE]

http://www.eng-tips.com/viewthread.cfm?qid=434058

See string in the link. I uploaded a spreadsheet a while back. That spreadsheet has a few limitations. See my post.

 

[civeng80]

Thanks, I was aware of that thread, but I have most of the references of tilt up panel, however there is not much on structural in built design of the panels. I have downloaded your spreadsheet, thanks for sharing. Question why have you got 3 strips for the load combinations and have you applied the Iterative method design or ACI 318 method?

 

[CBEngi]

The Canadian "Concrete Design Handbook" does a pretty good job explaining the basics of tilt-up panel design.

 

[Budding_SE]

Typically the panel gets divided into 3 strips to design it. If its small enough, i have a code for the minimum strip with (its based on judgement). There is no rule as such for the minimum strip width. If you change those parameters and the height of the wall, you will get 2 strips instead of 3.
And yes for the iterative deflection.

 

[civeng80]

Thanks Budding.
One thing I always wondered about for tilt up panels is an Euler buckling check simply for Dead load plus Live load since they always look very slender (6 inches for a height of 25 feet or more). It doesn't seem to be in the calculations or the Weiller or Green Book method. Can such a check be done and if so how ?