×
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

Windmills stress distribution for the foundation

Windmills stress distribution for the foundation

Windmills stress distribution for the foundation

(OP)
When I consider remedy measures for foundation of a windmill, it´s correct to taking into account triangle distribution of stress on the level of the toe?

It´s composition of:
1. stress from transformation of the moment
2. stress from weight of foundation
3. stress from weight of a tube and rotor is neglected.

After some exercise, I reach the solution for a worst-case. It´s means max. under the corner of foundation and zero under the center( triangle distribution).

Any suggestion?

RE: Windmills stress distribution for the foundation

coopernik,

There have been a couple of posts on biaxial foundation stress. Do a search at the top.

csd

RE: Windmills stress distribution for the foundation

Tat is not good for a foundation in soil. Zero point should not leave the heel. Otherwise a.) method calulating stress changes, b) stress increase rapidly.
Suggest the foundation be reviewed, size may need to be increased.

Also if the tube and rotor add weight to the structure, it should be included in the foundation load.

RE: Windmills stress distribution for the foundation

If the portion of the foundation in tension is to be utilized, helical anchors or piles with uplift capacity must be utilized.  Try a drilled pier or caisson foundation with embedment into good soil: say a 48" diameter drilled pier with 35' embedment. Depending on the horizontal subgrade modulus, this combination works for large moments and moderate axial loads.

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