Reinforcement details around large openings in slabs 1

[Amr Abdelhalim]

I need help in reinforcement details around large openings in RC slabs, I am aware that ACI 318 states that the removed reinforcement by the opening is to be put on each side of the opening. The problem here that I have large openings (1m x 2m) due to mechanical requirements inside a slab of thickness 1m, I don't think only replacing removed rebars on each side is right in such case, I need some resources in dealing with such large openings, thanks.

 

[BAretired]

You might consider using Yield Line Analysis (upper bound) or the Hillerborg Strip Method (lower bound).

BA

 

[estructe]

You can use a fea program to do the proper design, like SAFE.

Structural Analysis of 2D Structures software
Static, Dynamic,Linear and Non-Linear Analysis
of frames, trusses, beams etc.

 

[Earth314159]

Design the slab as a series of strips. Take about 1 meter wide strips each side of the opening. Each strip is designed like a one way slab or beam. The header strips are designed to span to the centre line of each of the perpendicular strips.