×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

modelling slab fold in etabs

modelling slab fold in etabs

modelling slab fold in etabs

(OP)
Hi all,

Just wondering if anyone can recommend how to draw a slab fold/ step (1 m deep) between lower ground floor and upper ground floor in etabs?

RE: modelling slab fold in etabs

Create a reference plane at the required elevation and use the spandrel opton to connect the 2 slabs.

RE: modelling slab fold in etabs

(OP)
Chekre,

I never really get the use of spandrel. I tend to like the answer (e.g. bending moment) i get better when i use a frame element e.g. for door opening. I have tried meshing the spandrel. but to get a realistic looking answer i have to label each spandrel something different all the way through the length of it. Any thoughts on how to fix that? have you come across it?

Just not sure how it fares as a slab fold. Also, i do not want to design it as a beam, simply a slab fold.

RE: modelling slab fold in etabs

Right. Chexk the autolabeling of spandrel it will economise a lot of time.
Personally i model the slab folds as beam spanning between support since there will be no continuuty between the 2 levels except by this member.
Can u tell me how are u planning to design it as a slab fold ? U can also check the stresses in the spandrel.and design it the way you judge corrext

RE: modelling slab fold in etabs

(OP)
Chekre, where is this auto labeling feature for spandrel?
it will be designed with program such as rapt. Personally, i would just ignore the stiffness contribution from the slab fold in terms of strength and detail the slab fold to allow bar continuity and cracking at corners.

RE: modelling slab fold in etabs

(OP)
Chekre,
I don't really get how to make use of stresses in the spandrel...how does that help me design the slab fold?
This is the same as a deep beam in etabs...looking at stresses can help me visualise if the compression and tension is in the right location..but i do not know how to design purely from stresses output from etabs.

Please guide?

RE: modelling slab fold in etabs

The autolabeling figures when u select the wall definituon and wants to draw it. Have a look there. U will find it.
As.for the slab mold, display the forces on your spandrel (f11 f22 f12 m11 m22 and m12) and design ur drop accordingly.
As i told u personally i prefer to analyse a drop of 1 m as a beam carrying 2 levels and not use the details which insure a continuity since i dont believe that i will unless the drop is equal or less than the slab thickness that u are dealing with

RE: modelling slab fold in etabs

(OP)
Chekre,

I still cant find an autolabelling tool for spandrel..can you show me where? like assign-> shell-> where? where can i autolabel?

i dont really know how to use stresses for design...as its not equivalent to Ultimate limit state design where concrete is assume cracked..and all tension is localised in the rebar etc...

can you give an example?

RE: modelling slab fold in etabs

4d modeler,
u can find the autolabeling thing when u pick the spandrel option and begin to draw.
i dont etabs on the computer i am using. once i am home i will screenshot it for u.
regarding the slab mold and since u will design it as s slab, use the forces in the spandrel m11 m22 m12 and the shears to evaluate the load transfer and how u should reinforce your element (have a look at the local axes to check which moment, shear, axial) to consider.

RE: modelling slab fold in etabs

(OP)
Chekre, please screenshot for me . thank you.

RE: modelling slab fold in etabs

which version are u using ?

RE: modelling slab fold in etabs

(OP)
15.0

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources