×
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

Can you take torsion at distance dv from the face of the supports?

Can you take torsion at distance dv from the face of the supports?

Can you take torsion at distance dv from the face of the supports?

(OP)
I am curious if we can take torsion at distance dv from the supports like we can with shear? I have heard mixed feelings about this and was curious what ACI but especially CSA A.23 has to say about this.

Also, if I have a cantilevered slab on top of a beam, this slab will introduce torsion into the beam. I was told to take the eccentricity from the center of the slab to the FACE of the beam as opposed to the center of the beam. I am not convinced at all but wanted some second thoughts on this.

Clansman

RE: Can you take torsion at distance dv from the face of the supports?

The critical section for torsional stress may be taken as dv away from the support, same as shear...because torsional stress is, in fact shear stress.

If a slab cantilevers from a beam with no back span, then torsion in the beam is wL^2/2 where L is the distance from the centroid of the beam to the end of the cantilever.  

Moment in the slab, however, may be measured to the face of support.   

Best regards,

BA

RE: Can you take torsion at distance dv from the face of the supports?

Agree with BAretired, the beam you have described is working in equilibrium torsion and torsion must be designed for. I would analyse the eccentricity to the centreline of the beam.

You are really getting into the r/c design questions today.

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