W- Armer moments
W- Armer moments
(OP)
What is Wood and Armer moments in reinforced concrete slabs idealised as grillages.
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RE: W- Armer moments
A ref for this is R.H.Wood – „The reinforcement of slabs in accordance with a pre-determined field of moments”, Concrete, February 1968
a
RE: W- Armer moments
a) Mx, My, and Mxy are fetched or calculated, as described above. They are used to compute the values of design moments, Mxd and Myd.
b) For top reinforcement, the program computes:
Mx1 = Mx + abs(Mxy)
My1 = My + abs(Mxy)
Mx2 = Mx + abs(Mxy2 / My)
My2 = My + abs(Mxy2 / Mx)
If both Mx1 and My1 are positive, Mxd = Mx1 and Myd = My1.
If both Mx1 and My1 are negative, Mxd = 0 and Myd = 0.
If Mx1 is negative and My1 positive, Mxd = 0 and Myd = My2.
If My1 is negative and Mx1 positive, Mxd = Mx2 and Myd = 0.
c) For bottom reinforcement:
Mx1 = Mx - abs(Mxy)
My1 = My - abs(Mxy)
Mx2 = Mx - abs(Mxy2 / My)
My2 = My - abs(Mxy2 / Mx)
If both Mx1 and My1 are positive, Mxd = 0 and Myd = 0.
If both Mx1 and My1 are negative, Mxd = Mx1 and Myd = My1.
If Mx1 is negative and My1 positive, Mxd = Mx2 and Myd = 0.
If My1 is negative and Mx1 positive, Mxd = 0 and Myd = My2.
Mxd and Myd are then used in lieu of Mx and My for calculations of the required reinforcing.