×
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

Retrofitting of Reinforced concrete Pile Cap

Retrofitting of Reinforced concrete Pile Cap

Retrofitting of Reinforced concrete Pile Cap

(OP)
Hi Everybody,

I have a existing four pile cap, It was decided to add two more new pile and join to the existing foundation by
Hilti epoxy Rebar. It is joined by the shear rebar as shown in the figure.

(a) Rebar transfers the shear force from the two pile cap to the existing pile cap at the joint.
(b) If she shear is taken by the shear rebar, what is the length of rebar to be embedded in concrete?
(C)If all the shear is transferred by the shear rebar, the concrete at the joint should also have enough shear capacity ?

RE: Retrofitting of Reinforced concrete Pile Cap

Sounds like a shear friction application to me. As such, the bars would need to be fully developed either side and the concrete check would be two fold:

1) Shear friction at the joint.
2) Regular diagonal tension at the joint.

Your design should also consider any other forces present at the joint. If there is significant moment, you'll want most of your rebar on the tension side. Hilti has some great resources for the design of these kind of joints,

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: Retrofitting of Reinforced concrete Pile Cap

How the load is applied to the pile cap is important. A single point load (say, a column) will have different requirements than a load disturbed over the pile cap surface (say, a machine).

www.SlideRuleEra.net idea
www.VacuumTubeEra.net r2d2

RE: Retrofitting of Reinforced concrete Pile Cap

(OP)
ok my shear rebars are sufficient for all the forces in that joint. However, pile cap thickness is not sufficient to carry shear is it ok. note that existing pole cap thickness cant be increased

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