hasnain.murmurwala
SEFI Member
Joined: 17 Nov 2010
Posts: 1
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 Posted: Fri Aug 18, 2017 4:54 amPost subject: Pile Number calculation & Pile cap / Foundation Sizing for Category 1 Structure. |
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Dear all,
As per table 18 of IS:456 2000,
A sample load combination involving seismic force ( DBE) will be
(a) For Stability check : DL + Seismic Load (DBE)
(b) For strength Design : 1.5 DL + 1.5 * Seismic Load (DBE)
If we Re-Write the same combinations for MCE earthquake
(c) For Stability check : DL + Seismic Load (MCE)
(d) For strength Design : 1.0 DL + 1.0 * Seismic Load (MCE)
Considering the fact, MCE ~ 2 x DBE, this combination will lead to Higher size of Foundation comparing the stability load combination, whereas the effect on design will not be that significant.
我们需要评估所需的桩数量(For Piled Foundation ) & Size of Foundation for shallow foundation based on above load combinations ( i.e. c & d )
Further to this,
As per IS:1893 Part 4 (2005), clause 7.5.1 " Structures in Category 1 shall be designed for maximum considered earthquake (MCE) "
This clause is not appearing in recent version of the code.
What is the correct understanding of this phrase " Design for MCE earthquake & Check for DBE"
Regards |
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