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Consideration of Seismic Force of Raft on pile

 
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chaubeyskc
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PostPosted: Fri Jan 03, 2014 4:25 am    Post subject: Consideration of Seismic Force of Raft on pile Reply with quote

Dear Friends,<xml><o></o>
<o> </o>
I need your expert opinion on following<o></o>
<o> </o>
1)      Whether self-weight of raft resting on piles should be considered in seismic weight  or not? Since <o></o>
2)      If answer is yes then What should be the R factor for raft with piles.<o></o>
3)      Any relevant reference (code applicable in our case is ACI-08/UBC97)<o></o>
Super structure is steel framed building for turbine hall, the raft top is at +0.3m above ground and about 1.8m deep.<o></o>
Since our piles are governed by horizontal reaction coming out of seismic load only when considering the self-weight of raft in seismic weight.<o></o>
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VPandya
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PostPosted: Fri Jan 03, 2014 8:36 am    Post subject: UBC 1997 can be a Design Code anymore. Reply with quote

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Last edited by VPandya on Fri Jan 03, 2014 8:42 am; edited 1 time in total
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VPandya
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PostPosted: Fri Jan 03, 2014 8:41 am    Post subject: Re: UBC 1997 can not be a Design Code anymore. Reply with quote

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Last edited by VPandya on Fri Jan 03, 2014 3:15 pm; edited 1 time in total
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VPandya
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PostPosted: Fri Jan 03, 2014 3:14 pm    Post subject: Re: UBC 1997 can not be a Design Code anymore. Reply with quote

Dear  Er.  Chaubeyskc

Your statement:

"Any relevant reference (code applicable in our case is ACI-08/UBC97)."  

UBC 1997 can not be a Design Code anymore.  See my post dated 28th March 2013.  Point is there is no such thing as UBC 1997 . You have to use ASCE 7-10.  UBC 1997 was superseded  by  ASCE 7-05 and ASCE  7-10 few years back.  

Regards.

Vasudeo Pandya  P.E. ; S.E.
Structural Engineer

Copy of my post  28th March 2013:
----------------------------------------------------------------------------------------------------
Dear Er.  Ykalamkar ,

UBC  IS NO LONGER A VALID CODE IN USA. USE ASCE 7-10.  Valid code is IBC 2012 and this refers  to  ASCE 7-10 as a reference  document for all  Loads including WIND and SEISMIC.  UBC  1997 is superseded  by  IBC 2006 and IBC 2012.

ASCE  7-10 :  " Minimum Design Loads for Building and Other Structures. "

There is a book " Seismic and Wind Forces. Structural Design Examples " . This has many worked out examples for wind loads based on ASCE 7-10.  This is published by ICC same people who publish IBC Codes.

Point is there is no such thing as UBC  CODE  in USA  anymore, from where  UBC was published.

Regards.

Vasudeo Pandya  P.E. ; S.E.
Structural Engineer
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