N = N = A . f = A . f (1)
s (pv) s s (pv) (pv)
>
A = A . ______ (2)
(pv) s
fs
f(pv)
(pv) s
.. A = X . A (3)
.
X = ______ (4)
fs
f(pv)
f = n . f
(pv) y (pv)
X(t) = ______ (5)
fy
n.f y(pv)
A(pv) = ______ As (6)
fy
n.f y(pv)
nD (pv) = nD s . fs = D(pv) = K . Ds
_____ ____ ____
4 4 f(pv)
(7)
k = ______
fs
f(pv)
_
_______
_______
___
(8)
k = ______
_
_______
_______
___
fy
n.fy(pv)
(9)
fy
0,65fy(pv)
fy
0,75fy(pv)
kt = ______
0
kt = ______
_
_______
_______
___
_
_______
_______
___
D (pv) = Ds ______
fy
n.fy(pv)
(10)
_
_______
_______
___
n.fy(pv) 0,65x800
A (pv) = fy . As = 390 A (pv) = 0,75As
____ ______
A (pv) = 0,65As
_
_______
_______
___
fy
n.fy(pv)
fy
n.fy(pv)
D (pv) = Ds ______
= D (pv) = Ds ______
_
_______
_______
___
= 0,865Ds
D (pv) = ______
_
_______
_______
___
390
0,65x800
_
_______
_______
___
= 0,805Ds
______
= Ds
390
0,75x800
