Contact US

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!

*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

ASCE 31-03: Evaluating Cantilever Columns - CALIFORNIA

ASCE 31-03: Evaluating Cantilever Columns - CALIFORNIA

ASCE 31-03: Evaluating Cantilever Columns - CALIFORNIA

Hello Everyone,
I am totally new to Eng-Tips, so forgive me if I am repeating the thread (I couldn't find anything on this though).

I am evaluating 2 different buildings, one has reinforced cantilevered concrete columns and the other has cantilevered steel columns as the LFRS. The buildings have alot of issues and the aim is to demonstrate that the buildings are not safe. However, one of the criteria of the program that I am dealing with is that it has to be analyzed using ASCE 31-03.

The problem with ASCE 31-03 is that it does not include Cantilevered Column (steel/concrete) systems, which means there are no set ways of doing quick checks (Tier 1) for issues such as shear stress etc. I am pretty much stuck at calculating the Pseudo-lateral force (which I have calculated). But I can't seem to figure out as to where I can fit in cantilevered columns in the checklists in ASCE 31.

I am wondering if anyone else has had to analyze a building with cantilevered columns as the LFRS under ASCE 31.


RE: ASCE 31-03: Evaluating Cantilever Columns - CALIFORNIA

I've never used ASCE 31 but you might have to go back to ASCE 7, ACI 318, and AISC 341 and run a full engineered analysis.

Professional Engineer (ME, NH, MA) Structural Engineer (IL)
American Concrete Industries

RE: ASCE 31-03: Evaluating Cantilever Columns - CALIFORNIA

Cantilever Steel or Concrete would be a subsection of S1 and C1. Hopefully that helps.

RE: ASCE 31-03: Evaluating Cantilever Columns - CALIFORNIA

Thanks Sandman. That is true, it is a subset, however, C1 & S1 are all frame systems. That is, beam stiffness plays a role in lateral resistance, as the connections are assumed moment connections. Hence, the formulas that are provided pretty much apply to frame systems, rather than an "inverted pendulum". At this point, I am just thinking about a hybrid approach, where I'll use whatever I can from ASCE 31 and figure out the rest based on structural analysis formulas.

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! Already a Member? Login


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close