RAMPS on etabs
RAMPS on etabs
(OP)
I modeled a house with a sloped roof then i also put a 20psf live load, but when i run the analysis, the dead weight and live load in the roof didn't transfer to the beam connected to the slab. How can i do it right? I already meshed it since a etabs considered a slope slab as ramps. Do i need to define this as shell and not as membrane?
please help me
thank you very much
please help me
thank you very much





RE: RAMPS on etabs
RE: RAMPS on etabs
RE: RAMPS on etabs
RE: RAMPS on etabs
RE: RAMPS on etabs
you have two choice
1- you can model your structure with sap2000 , sap2000 has an option to transfer the loads to the frames elements a coording to the shell's locals axis ( assign area load/ uniform to frame (shell) ), then run analyis and check the forces in the frames.
2- you can export your model as an s2k file then import it with sap2000 , then re load your shell elements with this option ( assign area load/ uniform to frame (shell) ).
sorry for my english.
RE: RAMPS on etabs
Post your model.
RE: RAMPS on etabs
RE: RAMPS on etabs
i mean, i want to see the loading at the beam first but if it distributed automatically, how can i check if it?
thank you very much!!!!
RE: RAMPS on etabs
Try using shells and manualy meshing the ramps to have nodes compatible with beams elements in more locations than start/end of the beams.
This should work for you.
RE: RAMPS on etabs
i still cant get the right forces on the beam
RE: RAMPS on etabs
below is the link to my sample model on ETABS ramp model
please tell me my mistakes because i still get the right uniform load that i need in the beam. I still get a lesser value than the manual computation i made.
Thank you
Poems are made by fools like me, but only God can make a tree. engineers creates wonderful buildings, but only God can creates wonderful minds
RE: RAMPS on etabs
What I see in your model are:
one beam has both end released and the other is fixed.
also the ramps were not meshed.
I suggest you select both the ramps then go to the assign menu ->shell/area -> area oblect mesh options.
under ramp and wall meah options, select subdivide object into 4x4. then run the analysis. that should work.
RE: RAMPS on etabs
Poems are made by fools like me, but only God can make a tree. engineers creates wonderful buildings, but only God can creates wonderful minds
RE: RAMPS on etabs
RE: RAMPS on etabs
That's my point, i want to transfer the load to the beam
Poems are made by fools like me, but only God can make a tree. engineers creates wonderful buildings, but only God can creates wonderful minds
RE: RAMPS on etabs
I uploaded the file named "slope3.edb":
http:
I hope it is visible and that you are able to download it.
In the file I modified the following:
- I manually meshed the ramp elements: they are now physically/geometrically composed of several (e.g. three) elements. Supplementary, I have assigned internal mesh at some given step.
- I also defined the "SLAB1" section as shell.
The model seems to have an acceptable behavior now.
RE: RAMPS on etabs
Poems are made by fools like me, but only God can make a tree. engineers creates wonderful buildings, but only God can creates wonderful minds
RE: RAMPS on etabs
RE: RAMPS on etabs
I only have 9.2 version here in the office
Please saved it in earlier version?
thank you
Poems are made by fools like me, but only God can make a tree. engineers creates wonderful buildings, but only God can creates wonderful minds
RE: RAMPS on etabs
Please find attached the files named "slope3.e2k" and "slope3.$ET"
Go to [File > Import > ETABS .e2k Text File...] and the program should read the input from one of these two files.
I do not have permanent access to a computer having ETABS installed, therefore I used whatever version was available.
I remember having reported at one point to CSI technical support that, in ETABS, the ramps do not transfer the gravitational loads to the beams. Their advice was to use SAP2000. This was for earlier version of ETABS (I believe 9.1), but I noticed that in version 9.4 this problem was absent. So, if you upgrade, it is likely that ETABS will handle the ramp issue by itself.
RE: RAMPS on etabs