one way slab behavior
one way slab behavior
(OP)
Hi, I just want to ask about the behavior of a slab supported in two sides only and has (L/S) less than 2? Can I treat it as a one way slab? I mean if I use ANSYS program shall I get a curvature in the transverse side of it?





RE: one way slab behavior
As far as your last question, I'm not sure what program ANSYS is, but you should be doing one way analysis by hand.
RE: one way slab behavior
RE: one way slab behavior
You must always ensure that your chosen model is appropriate for the material behavior, the response you hope to mimic, and the boundary and loading conditions. Never attempt the reverse.
Independent events are seldomly independent.
RE: one way slab behavior
RE: one way slab behavior
Independent events are seldomly independent.
RE: one way slab behavior
RE: one way slab behavior
Whether a concrete slab is "one or two way" depends on the direction(s) that the reinforcement runs in. It is a one way slab when the slab has tension reinforcement spanning between two supports. A slab is "two way" when tension steel runs in two directions. The supports can be 2, on opposite sides, or 4, one support at each edge, however it is the tension steel running both ways that makes a concrete slab 2 way. A concrete slab with tension steel in one direction only, can be supported on all sides, but still only be one-way, because it has no capacity to resist bending moment perpendicular to the direction of reinforcement.
If the material is homogenous in each direction, YES, then whether it behaves as one way, or two, way depends on L/S and location of supports, but that is not true for concrete with tension steel spanning only between 2 opposing supports. Concrete is not homogenous in both directions when the reinforcement is only in one direction.
Independent events are seldomly independent.
RE: one way slab behavior
RE: one way slab behavior
Independent events are seldomly independent.
RE: one way slab behavior
RE: one way slab behavior
Hint: for simple load case on flat square or circular plates, and you want to design using 2-way action, look for Roark's formulas. Much faster than ANSYS.
Independent events are seldomly independent.
RE: one way slab behavior
If a slab is supported on two sides only, it is a one way slab, no matter the reinforcement. The loading can change this somewhat, as there will be purely one way action for uniform loading, but for point loads, two way action is required to distribute the load over a width.
For a slab supported on four sides, two way action always exists, also regardless of the reinforcement, but is sometimes ignored in modelling.
Reinforced concrete does behave as a homogeneous material...until it cracks.
RE: one way slab behavior
Independent events are seldomly independent.