×
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

Tensile Stress In Concrete Ringwall

Tensile Stress In Concrete Ringwall

Tensile Stress In Concrete Ringwall

(OP)
I am designing an AWWA D100 circular steel tank that is supported on a concrete ringwall.  I am designing the anchorage to the tank using ACI 318-02 Appendix D "Anchoring To Concrete".  When designing for pullout strength ( Section D.5.3 ), there is a variable Y4.  It then gives a stipulation "For an anchor located in a region of a concrete member where analysis indicates no cracking ( ft < fr ) at service load levels, the following modification factor shall be permitted, Y4 = 1.4".

I have the hoop tension in the concrete ringwall calculated.  

My question is to get the tensile stress, ft, do I divide the hoop tension by the gross area of the ringwall because it is all in tension?

Any help is greatly appreciated

RE: Tensile Stress In Concrete Ringwall

For the ringwall, the tension will be divided by the gross area to determine the tensile stress in the concrete, provided that the loads acting downward are colinear with the loads acting upward.  Otherwise, one will get a torsional moment on the ring.

Typically, the tensile strength of the concrete is ignored for the ringwall design, and the rebar is designed to take the full hoop tension.

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