Just for curiosity I change the order on how I defined the points:
Before
X = [0, 2, 2, 0, 0, 2, 2, 0]
Y = [0, 0, 2, 2, 0, 0, 2, 2]
Z = [0, 0, 0, 0, 2, 2, 2, 2]
After
X = [0, 2, 0, 2, 0, 2, 0, 2]
Y = [0, 0, 2, 2, 0, 0, 2, 2]
Z = [0, 0, 0, 0, 2, 2, 2, 2]
That minor difference was key in...
Hello fellow engineers,
I am working on a simple script to create a slab from 3D elements, here is my code:
import comtypes.client as cc
import numpy as np
import os
# Intenta conectar a una instancia existente de SAP2000 usando GetActiveObject
SapObject =...
Thank you so much, I realize SapModel.File.NewSolidBlock() creates a new file , I was expecting to add solid objects to an existing file, that explains many questions I had.
The documentation says:
Which made me think it creates a solid object and everything should be good, but looking at...
Usually the concrete section is what contributes to the inertia and stiffness and what ultimately controls deflection in RC structures, adding rebars will theoretically add a little of inertia but not for so much. If you have problems with deflection in your slab, you can:
- Increase the...
Hello, I have the following code:
That exact sections where I have questions is here:
ret = SapModel.File.NewSolidBlock(8, 8, 4,"" ,nombre_prop_solido, 4, 4, 2)
If I set the units to inches:
SapModel.SetPresentUnits(1)
Everything is normal and work as expected, but if I use anything but...
You can calculate a pseudo story stiffness by just dividing the story force by the deformation on the required direction, since you are doing a non linear analysis you should decide in what state you want to measure the stifnesss, it could be stiffness at yield, at maximun force or at ultimate...
If I have to guess, you did not mesh the membrane slab. Right?
Ok, looking at your etabs model, your slab is defined as a deck, and here the catch, in Etabs decks are always modeled as membrane, which mean it only support forces along its own plane, if you use a membrane element you need to...
If colaboration is so important, have you ever tried working the structural geometric model in the REVIT domain (using the analytical space)? There is a tool called speckle that manage data from different software, I am pretty sure you can export the basic model into ETABS and when you finished...
Greeting,
What Etabs does to a slab shell element to make it "ribbed" ?
I found an article that claims that a ribbed shell elements mimics the orthotropic stiffness of the element if you select this type, but not idea what are the exact modifiers values
I should be able to make a simple slab...
Usually the transfer of forces in a elastic analysis is made by the following criteria:
- The stiffer the object the more force will attract to its element
So you are not crazy getting these results, but there is a catch:
When the structure get into an non linear domain, that knee braced...
There are some thoughts I want say:
-For slabs on the ground, in general the major restriction for lateral movements is the soil friction.
-The edge thickening in the slab may provide some degree of lateral restriction but shouldn't be taken into account unless the friction is overloaded, which...
Greeting fellows engineers, I am making a thesis about slab flexibility and so slab rigidity is an important topic to me.
I want to know what exactly does Etabs to shell element when I select the type as "ribbed". The manuals are very blurry in this topic to say at best.
I found an article...
1- If you require beams that are offset from the column line , you should probably offset the column first so beams are not require to be offset.
2- I probably will use a shell thick element to model those beams and a shell thin element for the slabs as the figure below
Hello Josh,
Yes, I activated self weight on section definition and that goes to my load dead case which has the self weight multiplier set to 1, my model has frames and shell elements (walls), so I guess part of that goes to the joints in the foundation. Thanks for your recommendation
Hello everyone:
I am having issues at understand why Etabs is assining masses in reaction nodes, it doesnt make any sense, I lumped masses at story levels, but Etabs doing at base level (reactions) is just wonkers. Any way to undo that behavior...
