Required Reinforcement for Mat Foundation
Required Reinforcement for Mat Foundation
(OP)
Dear All,
In one of design sheets, I've seen that original designer used a below described formula to calculate the reinforcement required for the mat foundation, where M(ULS- kNm) moment and axial (ULS-kN) force exist in section, but nowhere I can see from where that formula is originated, I really will appreciate if someone can point out to me the reference for that formula,
K = M*1000 / (bw*d2) ; [N/mm2]
w = { 1-(1-2,36*K/fcd) }1/2/ 1,18 ;
As_required = w*fcd*bw*d/ fyd + N/(2*fyd/10) ; [ cm2 ]
Regards
In one of design sheets, I've seen that original designer used a below described formula to calculate the reinforcement required for the mat foundation, where M(ULS- kNm) moment and axial (ULS-kN) force exist in section, but nowhere I can see from where that formula is originated, I really will appreciate if someone can point out to me the reference for that formula,
K = M*1000 / (bw*d2) ; [N/mm2]
w = { 1-(1-2,36*K/fcd) }1/2/ 1,18 ;
As_required = w*fcd*bw*d/ fyd + N/(2*fyd/10) ; [ cm2 ]
Regards






RE: Required Reinforcement for Mat Foundation
But it's the kind of approach that lends itself to personal instruction rather than book learning. Are there any old timers there that can help you?
RE: Required Reinforcement for Mat Foundation
The greatest trick that bond stress ever pulled was convincing the world it didn't exist.
RE: Required Reinforcement for Mat Foundation
I just found the design for mat foundation from vulcanhammer.net http://www.vulcanhammer.net/utc/ence461/s2002/461-... it refers to something as ENCE 461 which exactly match the As_required, and having establishing the relations with simple stress-strain relations and extracting the As is quite conceivable.
But the confusing thing is I really don't get whether that ENCE 461 is international standart code or simply stands for acronym of some sort of short courseware for that vulcanhammer company?
Regards,
RE: Required Reinforcement for Mat Foundation
The greatest trick that bond stress ever pulled was convincing the world it didn't exist.