×
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

Concrete Shear Wall Building

Concrete Shear Wall Building

Concrete Shear Wall Building

(OP)
Hi all

I'm modeling a 3 storey building which has shear walls resisting lateral load and the floors are pt slabs and composite beam - metal deck system.

So I'm using SAP 2000. I started off modeling only the elements that I was using to resist the lateral loads i.e. the shear walls as well as a concrete slab on each floor with appropriate thickness. The model was only meant for lateral analysis so I believed I could leave out columns and beams that are only used for transferring vertical loads.

But now I find that all 12 modes are out of plane bending of my slabs. Am I mistaken and should I include columns and steel beams in my model? I thought they would make my building stiffner and should be thought as secondary elements.

Well, maybe someone can give me some advice on the topic.

cheers.

RE: Concrete Shear Wall Building

I know in Risa-3d there is an option to define diaphragms as "In plane bending only".  Is there an option in SAP 2000 for this? If not, try releasing the out of plane forces on the plate elements - Mx, My and keep only the shears Vx, Vy.

I thought the standard practice was to assume a rigid diagragm for these slabs. If the shear wall orientations in your building is irregular then you might need to model the slabs stiffness but if there is symetry then it might be ok to model the floors as rigid.



 

RE: Concrete Shear Wall Building

i didn't understand,

why wouldn't you use all the structure as a frame, it will reduce the steel and concrete quantities and stresses in the building, and will provide with extra rigidity against earthquakes and winds.
 

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