×
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

ASCE7-05 12.13.4

ASCE7-05 12.13.4

ASCE7-05 12.13.4

(OP)
ASCE 7-05 section 12.13.4 Reduction of Foundation Overturning

Overturning effects at the soil-foundation interface are permitted to be reduced by 25% for foundations of structures that satisfy the following conditions:
A The structure is designed in accordance with the Equivalent Lateral Force Procedure
B The structure is not an inverted pendulum or cantilever column type system.

How I read this is that I can reduce the seismic loads on my foundation by 25% for load cases with seismic load where the foundations are governed by overturning, sliding or bearing pressure (so essentially uses 75% of the seismic load or 0.7*0.75 for Allowable Stress Design Load Combinations). Is this the correct interpretation?

RE: ASCE7-05 12.13.4

My interpretation is the same. Rationally, I think that should apply to everything below the seismic base if there's below grade structure. I suppose that's another conversation however.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

RE: ASCE7-05 12.13.4

That is correct. If your building is one story I would caution against using this provision even though it is technically permitted.

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