Floor slab design

RE: Floor slab design

Abeeb Adebayo — Tue, 20 Oct 2020 14:59:59 GMT

Thanks Modestas.

RE: Floor slab design

Modestas — Tue, 20 Oct 2020 14:52:00 GMT

No, you do not need to merge it. If you merge the beams, the connectivity between the beams and the plates will not be correct.

RE: Floor slab design

Abeeb Adebayo — Tue, 20 Oct 2020 14:37:59 GMT

Hello sir. Based on this your answer, I have a question.

Beams that are splited during plate meshing, do I need to merge them again to become one?

Because analyzing it as splited makes the beam to be series of beams with equal spans corresponding to the mesh segments. Thanks

RE: Floor slab design

Sye — Thu, 19 Sep 2019 19:04:42 GMT

When you choose the Geometry > Generate Mesh > Create Mesh option, you will need to click on the nodes to define the boundary to identify the meshing area. Once you click back on the first node to close the loop, you will get a dialog box where you can specify the number of divisions along each edge

By appropriately I meant a couple of things.

a. Don't use too many divisions. The default is 10. You may try with smaller number of divisions if you are getting too many plates with 10 divisions along each edge. For smaller edges specially even 2 or 3 may be good. You need to use your judgement here. The goal is to minimize the number of elements being generated.

b. The number of divisions along the common edge for adjacent meshes need to match. So when meshing the regions ensure that you specify same number of divisions at the common edges.

RE: Floor slab design

Mukuntheshwaran Venkatesan — Thu, 19 Sep 2019 18:29:15 GMT

How to set the number of divisions appropriately along each edge and what does appropriately means.

In my structure the beams are not split into smaller segments. What would be the appropriate number of elements to split the beam?

RE: Floor slab design

Sye — Thu, 19 Sep 2019 18:23:09 GMT

When you mesh the slab ensure that you are controlling the number of plates by setting the number of divisions appropriately along each edge. Also before meshing, check if your beams at the periphery are already split into smaller segments or not as that may also cause the mesh to be finer than what it needs to be. The meshing would automatically split the beams as needed to establish proper connectivity.

RE: Floor slab design

Mukuntheshwaran Venkatesan — Thu, 19 Sep 2019 10:59:07 GMT

But doing like this will increase the computational time of the program. The plan above is a 5 story building, when i use generate mesh the computational time goes up to 1 to 2 days. I am working in my laptop of 12 GB ram. Is there any other way to do this?

RE: Floor slab design

Sye — Wed, 18 Sep 2019 20:10:14 GMT

If you would like to include the slab in the stiffness analysis you would have to generate a plate mesh. You may do so using the Geometry > Generate Mesh > Create Mesh option. Since the geometry is symmetric, you may generate the mesh for one quadrant and mirror the generated mesh about the vertical planes to generate the meshing for the entire slab. Loading would be applied as plate pressure load.