Which Analysis Method?

[Zizou87]

Hi,

I am a structural engineer working in the design section. I have graduated 2 years ago, but my experience in RC design spans a period of 2 months. So everythin's a bit new to me.

I am currently working on the design of a storage facility consisting of 3 slab panels placed adjacent to each other along the Y direction. That is, the slabs are longitudinaly in one line (similar to train carraiges). The panels are 3.5 m square. And they are bounded by beams along three sides; the fourth is connected to a cantilever 1.5 m wide which extends longitudinaly through all the slabs and stops midway through the last slab.
Except that, the panel in the middle is a void to cater for a spiral staircase. So, basically I have to design two panels that are separated by a void.

The issue is: a negative moment will be developed along the slab/cantilever interface in the first slab (which is fully joined to the cantilever); but in the last slab, part of it will develop negative moments while the other part will not.

My question: which analysis tool would be more appropriate? I have considered yield line theory, and the Design Code Empirical Method. Although I guess the empirical method will not work because not all the requirements are satisfied?

I have tried subdividing the last panel into two parts; and analyzing it by yield lines theory; where one part has a fixed edge and the other hasn't.

Appreciate your inputs...

Thx...

 

[ishvaaag]

If you have one, use a FEM package. CYPECAD, for example, will give you directly the reinforcement necessary. You quite likely can reinforce successfully the panels from some tables or yield line theory with some assumptions, but today the standard is to use a FEM package.

 

[Zizou87]

Thanks ishvaaag,

True...

Actually I have PROKON v6.0. I'll try using it...