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Daily Digest Sat Oct 30 23:00:03 2004

 
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ibarua
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PostPosted: Sun Oct 31, 2004 2:46 am    Post subject: Daily Digest Sat Oct 30 23:00:03 2004 Reply with quote

Re.: Query by Mahadevan Iyer
------------------------

If there is an RCC slab at the ground /parking floor level, then the slab will be supported by the plinth beams, which will ib turn be supported by the columns. The slab may transfer some or all the loads imposed on it to the beams if the subgrade on which it rests settles, as it is very much likely to, when loads are imposed upon it. Therefore, such loads should be taken into account in the analysis.

I do not understand why a RCC slab has to be provided for the parking area. Of course, plinth beams have to be provided; otherwise the ground floor columns may behave as long columns, as it happened in some buildings in Gujarat.

Indrajit Barua
Structural Engineer, Guwahati, Assam.

Quote:
Dear sefians,

In a building if a slab alongwith plinth beams are
provided at the plinth level (for parking etc.)should
its seismic weight be lumped to the frame as is done
for higher floor levels?

Intuitively I feel that this should not be done, as the
said slab as well as beams transfer the load directly
to the soil.

The IS code (IS 1893-2002) does not address this issue.

I hope you will be kind enough to clarify.

MAHADEVAN IYER
M.Tech (Structural Engg.)(3rd Sem.)
V.N.I.T. Nagpur.


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