×
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

Transformed Section of Composite Columns

Transformed Section of Composite Columns

Transformed Section of Composite Columns

(OP)
I am looking for some literature on the analysis of round columns that are composed of various materials.  I looked at the AISC 13th edition (Concrete-Filled Tubes/Encased Tubes), ACI 318-63 thru ACI 318-05 (Reinforced-Concrete Columns for both working stress and ultimate design), and even a Mechanics of Materials book, but I cannot find any information on how to transform different materials of a round column for axial and flexural analysis purposes.  For a column with axial compression only, all of the methods I've encountered simply take the area of each individual component multiplied by their allowable/ultimate strength and sum them up, without regard to their varying modulii of elasticity.  For a column with flexural load only, literature on transforming a section beyond the simple rectangular sections are few and far between.  Any help and insight on this would be greatly appreciated.

RE: Transformed Section of Composite Columns

Strengi - if you are just looking for a quick analysis technique, use the AISC 13th edition plastic distribution method where the axial capacity is determined per equation I2-13, then calculate the plastic moment capacity for the steel tube section alone(FyZ) as allowed per I3.3(b), then use the axial/moment interaction equations of Chapter C as permitted by I4.  I know this does not directly answer your question of transformed areas, however it is a valid technique.

RE: Transformed Section of Composite Columns

Do you have circular concrete column with a wide flange core? If so, look at treating the wide flange as reinforcing steel. Or do you have a steel tube filled with concrete?

RE: Transformed Section of Composite Columns

(OP)
Thank you all for your input.  However, the question is not relative to steel, concrete, or any other specific material, but simply to analysis of columns composed of materials with varying modulii of elasticity by the transformed section method.  I was only referring to AISC and ACI to determine their methods of analysis.

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