Simple Method for 2-Way Plates?
Simple Method for 2-Way Plates?
(OP)
Does anyone have or use a simple method for rectangular or (less importantly) circular plates with either uniform or single concentrated force (normal, axial, or moment)?
It seems these conditions turn up often in different small jobs, where a full on analysis is not justified, and I oversize the plate by assuming the worst case one-way bending. I would like a simple way to more closely, but still conservatively, approximate the stresses.
Recently I've had this case turn up both for steel plates and concrete slabs, and I felt like I was being grossly conservative using one-way bending.
Thanks in advance!
It seems these conditions turn up often in different small jobs, where a full on analysis is not justified, and I oversize the plate by assuming the worst case one-way bending. I would like a simple way to more closely, but still conservatively, approximate the stresses.
Recently I've had this case turn up both for steel plates and concrete slabs, and I felt like I was being grossly conservative using one-way bending.
Thanks in advance!






RE: Simple Method for 2-Way Plates?
1. Plate charts. I have a very good set of plate bending moment, shear and deflection tables in my copy of "Structural Engineering Formulas" by Ilya Mikhelson (ISBN#: 0-07-143911-0) A truly useful and excellent book.
2. Johanssen's Yield Line: You can calculate the specific situation in detail, which would not save you a great deal of time, however you can also find tables of ready-made yield line solutions (the time consuming part is therefore done for you). I would recommend the british publication "Practical Yield Design" by Kennedy & Goodchild
Available as a free download from www.concretecentre.com/PDF/PYLD240603a.pdf
Just be careful about the notation when using another country's documents!
Hope that helps,
Regards,
YS
B.Eng (Carleton), P.Eng (Ontario), MIPENZ (Structural-New Zealand)
Working in Canada, and missing my adoptive New Zealand family... at least I brought the little Kiwi with me!
RE: Simple Method for 2-Way Plates?
RE: Simple Method for 2-Way Plates?
I have ordered the book you mentioned, YS.