www.sefindia.org

STRUCTURAL ENGINEERING FORUM OF INDIA [SEFI]

 Forum SubscriptionsSubscriptions DigestDigest Preferences   FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups  RegisterRegister FAQSecurity Tips FAQDonate
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log in to websiteLog in to websiteLog in to websiteLog in to forum 
Warning: Make sure you scan the downloaded attachment with updated antivirus tools  before opening them. They may contain viruses.
Use online scanners
here and here to upload downloaded attachment to check for safety.

Pile cap design for uplift pile forces

 
Post new topicReply to topic Thank Post    www.sefindia.org Forum Index -> SEFI Web Site Problems/ Login/Registration Issues
View previous topic :: View next topic  
Author Message
vjavia
SEFI Member
SEFI Member


Joined: 10 Sep 2013
Posts: 2

PostPosted: Tue Sep 10, 2013 8:42 am    Post subject: Pile cap design for uplift pile forces Reply with quote

How can we calculate pile cap top reinfocement for uplift forces (of range 500kN) from pile.
Pile cap is resting on three numbers of pile and shape of pile cap is triangular. How much minimum reinfocement in pile cap top should be required in case of uplift forces?
Back to top
View user's profile Send private message
Dr. N. Subramanian
General Sponsor
General Sponsor


Joined: 21 Feb 2008
Posts: 5302
Location: Gaithersburg, MD, U.S.A.

PostPosted: Tue Sep 10, 2013 4:36 pm    Post subject: Re: Pile cap design for uplift pile forces Reply with quote

Dear Er. Vjavia,

The minimum reinforcement should be the same, as the min. reinforcement is provided to resist tensile forces only. Are all the three piles in tension? I believe at least one pile will be in compression and the other two will be tension.

You can calculate the BM as usual by taking moments caused by tension piles, at the face of column,  and provide top reinforcement.

Best wishes,
NS
vjavia wrote:
How can we calculate pile cap top reinfocement for uplift forces (of range 500kN) from pile.
Pile cap is resting on three numbers of pile and shape of pile cap is triangular. How much minimum reinfocement in pile cap top should be required in case of uplift forces?
Back to top
View user's profile Send private message
es_jayakumar
General Sponsor
General Sponsor


Joined: 24 Nov 2011
Posts: 1205
Location: Cochin

PostPosted: Wed Sep 11, 2013 1:14 am    Post subject: Reply with quote

Sir,

I think, the condition of all piles in tension can occur for a tall communication steel tower foundation on piles, for one of its independent legs, when the tower is subjected to wind load. In that case, I hope, the flexure reinforcement of the pile cap has to be provided at the top of it.

Regards,
E S Jayakumar
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topicReply to topic Thank Post    www.sefindia.org Forum Index -> SEFI Web Site Problems/ Login/Registration Issues All times are GMT
Page 1 of 1

 

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum


© 2003, 2008 SEFINDIA, Indian Domain Registration
Publishing or acceptance of an advertisement is neither a guarantee nor endorsement of the advertiser's product or service. advertisement policy