×
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 frame analysis

Concrete frame analysis

Concrete frame analysis

(OP)
Hello everyone,

I have built a 3D reinforced concrete frame in ABAQUS. The model is built in SI(m) units. I have also implemented a Damaged Concrete Plasticity model in my material definition and I have specified a compression stress of 51000000 N/m2 and a tensile stress of 2333333.33 N/m2. The model seems to have run fine. I have some beams aligned with the X axis which mainly bend in the plane XZ. If I look at the S11 stress (parallel to the X axis) the positive stresses (i.e. tensile stresses) at the beam midspan are greater than the tensile stress specified in the material definition. I am a little bit puzzled and I think there is something I am not interpreting correctly here as the model can only reach plasticity in tension at the tensile stress specified in the Damage Concrete Plasticity model or it can miss convergence if the loading is too onerous and internal equilibrium cannot be reached. I attach a picture below showing the beam I am talking about with a probe tensile stress value shown too. You can see how the tensile stress is greater than the 2.33333333 N/mm2



Does anyone have any suggestion on what I should double check in my model?

Thank you.

Martino

RE: Concrete frame analysis

I'm not familiar with that material model, but I think by definition S11 is not a tensile stress. It's a stress in a speific direction. A tensile stress can be found in the principal stresses.

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