I do not have litrature on it but I would model with solid and beam elements.

Roni Plachta
Roni@AnalysisPros.com
AnalysisPros - Finite Element Analysis Services
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Try the German book "Platten" by Stiglat and Wippel.

Section 13.4 of ACI 318 is about openings in 2-way slabs.
You can order ACI318 at their website www.aci-int.net.

Imagineer

Probably you can use any of the plastic approach to design your slabs with cut-outs.

azmi ibrahim
azmi@civil.engr.itm.edu.my

I'm always keen to learn more to advance
myself in areas that I'm interested in.

Prueba usar un software que se llama SAFE.

I think Jose is recommending SAFE from CSI Berkeley.

I would suggest using any FEA software like SAFE or RISA3D. Whatever means you use, be sure to accurately account for the effect of openings near column supports (i.e. reduced punching shear capacity). Since design for punching shear typically assumes that the loads come in from all directions, having an opening within the vicinity of a support will change the load path and thus change the shear behavior over that support.