×
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

Radial cracks from 10 ft dia storage tamls in containment

Radial cracks from 10 ft dia storage tamls in containment

Radial cracks from 10 ft dia storage tamls in containment

(OP)
I am evaluating a storage tank concrete foundation and cannot determine a plausible cause for the cracking pattern. I was wondering if anyone had seen a simular pattern?
I evaluated the foundation using a fea analysis and found it adequate as long as the subgrade modulus is about 90 lb/ft^3.
Facts
Bearing cap per 1994 report 2000 psf
10 ft dia tanks 15 ft appart 10,000 gal cap ea
12 in slab no 4 at 12 in top n bot
Radial crack pattern 10 ea tank even aroun perimeter
2 ft high containment wall 1 ft thick. No cracks in wall except for two.
40 ft by 36ft. Tanks ae 15 ft fr9m one side.

RE: Radial cracks from 10 ft dia storage tamls in containment

#4 @ 12 is pretty light reinforcement for a 12" thick slab. Maybe the cracks you are seeing are shrinkage cracks.

Are the tank walls steel or concrete? How much gravity load is transferred from wall to slab?

BA

RE: Radial cracks from 10 ft dia storage tamls in containment

Is the tank significantly warmer than the low ambient temperature?

Michael.
"Science adjusts its views based on what's observed. Faith is the denial of observation so that belief can be preserved." ~ Tim Minchin

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