×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

Barge Anchored by Steel Piles

Barge Anchored by Steel Piles

Barge Anchored by Steel Piles

(OP)
A barge carrying 700 Tons of added weight (7 motors) plus its own weight is to be anchored using driven steel pipes (piles), (48” diameter, 5/16” thick) that run 34 meters deep into the sea bed. The barge is to have free vertical movement while its lateral movement is to be transferred to the pile cap through bumpers, so it seems that only lateral loading of the piles would be important to consider.

The geotechnical report states that the allowable lateral load for the piles is 10 Tons.
I really need some guidance, since most of my experience is based on designing building structures. Some of the questions that come to mind are the following:

1)What lateral loads to consider. Certainly Seismic loads, but what type of structure would it be? Should I treat it as a cantilever structure? While considering loads related to the tide, is there a way to consider or estimate the lateral load as a percentage of the load supported by the barge and the weight of the barge itself?

2) What detailing goes into achieving that fact that the piles would permit the barge to freely move vertically while restraining it laterally? Should there be a fixed connection that the pile head? Is there a special detail of the piles at the sea bed?

3)Any other thing that I might be missing.

Thanks for your time.

RE: Barge Anchored by Steel Piles

I would not try to relate horizontal forces to barge displacement weight. Drag forces are shape based.

Water depth?

Current, wave and wind load on the barge. Start with getting the dimensions of the barge. You'll need that for drag calculations from wind, wave and current velocities. Check shoaling depth for waves and include wave shoal height. There may be wave currents with shoaling. Maximum current load is with maximum ballast. Maximum wind load is with lightest ballast.

Seismic loads are mass based, including water displaced. F = ma

Piles are cantilevers for lateral load purposes.
Do not forget the current and wave load impinging on the pile itself.

Bumpers should be continuous for required tide height. Calculate howser loads at max vertical angle. That may give some vertical component.

You may also want to consider a barge crash force at the wind and current driven barge velocity.

Independent events are seldomly independent.

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


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

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