×
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

ASD Side Resistance for Drilled Shaft Rock Socket

ASD Side Resistance for Drilled Shaft Rock Socket

ASD Side Resistance for Drilled Shaft Rock Socket

(OP)
The formula given in Article 4.6.5.3.1 of AASHTO HB-17 (page 85) for ultimate side resistance reads as follows:

Qsr = (pi)*Br*Dr*(0.144*qsr)

Yet the label on the y-axis for Figure 4.6.5.3.1A indicates that qsr is the unit side resistance.

Should the formula read:

Qsr = (pi)*Br*Dr*(144*qsr)

to make the units work out?! Or do they intend to reduce Qsr by a factor of 10 for some reason?!

All responses welcome.

Jeff

Jeffrey T. Donville, PE
TTL Associates, Inc.
www.ttlassoc.com

RE: ASD Side Resistance for Drilled Shaft Rock Socket

(OP)
Sorry, reduction should be 1000 - not 10.

Jeff

RE: ASD Side Resistance for Drilled Shaft Rock Socket

(OP)
The question was answered in the Foundation Engineering forum. Qsr is defined in kips, therefore 0.144 is correct.

Jeff

Jeffrey T. Donville, PE
TTL Associates, Inc.
www.ttlassoc.com

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