Flat Slab vs Conventional Beam Slab
Flat Slab vs Conventional Beam Slab
(OP)
Dear All,
For a high seismic activity zone, what frame system for a multi storey RCC building should be proposed.
Two options being;
1. Flat Slab supported directly on columns
2. Conventional Beam Slab supported on columns.
Recommendations requested.
For a high seismic activity zone, what frame system for a multi storey RCC building should be proposed.
Two options being;
1. Flat Slab supported directly on columns
2. Conventional Beam Slab supported on columns.
Recommendations requested.
Engr. Shakeel Ahsan
Director Engineering
CMEC - Pakistan






RE: Flat Slab vs Conventional Beam Slab
RE: Flat Slab vs Conventional Beam Slab
Engr. Shakeel Ahsan
Director Engineering
CMEC - Pakistan
RE: Flat Slab vs Conventional Beam Slab
I expect beam-column option could be cheaper.
RE: Flat Slab vs Conventional Beam Slab
RE: Flat Slab vs Conventional Beam Slab
RE: Flat Slab vs Conventional Beam Slab
Others have studied PT slabs and the ability to prevent crushing at column and shear wall interfaces.
Like anything else, you can always design and detail the connection.
In Terms of concrete systems, see ASCE 7-05. In California we use Concrete Moment Frames, Concrete Shear Walls, and Dual Systems. System selection depends on height, arch requirements, and what space is available for a seismic system etc... High rises lend themselves to dual systems....but some have designed with shear walls alone (tube structures). Pauley & Priestly have a good discussion on the topic of system selection.
RE: Flat Slab vs Conventional Beam Slab
We have set fc' for columns at 3750 Psi and for raft, retaining walls, shear walls, beams and slabs at 3000 Psi.
How this helps increasing stiffness at joints?
RE: Flat Slab vs Conventional Beam Slab
RE: Flat Slab vs Conventional Beam Slab
It's also very difficult to design flat slab / column joints such that they can sustain repeated, inelastic rotations without resulting in bond stress problems.
RE: Flat Slab vs Conventional Beam Slab
Engr. Shakeel Ahsan
Director Engineering
CMEC - Pakistan
RE: Flat Slab vs Conventional Beam Slab