Memorial de calculo

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Calcular a Armadura Longitudinal da Viga 20x70
Comprimento do Vão 7,20m largura do pilar de 30 
cm e carregamento de 25kN.m
Memória de cálculo
Aço C50 
Diametro do Aço 16 mm
e 5 mm estribo
Concreto C40
Cobrimento 3,5 mm]
Brita 19 mm
≔P 25 ――
kN
m
≔l 7.50 m
≔M =⋅P ―
l2
8
175.781 ⋅kN m ≔Msd ⋅1.4 M ≔h 70 cm
≔fcd 40 ――
MPa
1.4
≔d ⋅0.9 h ≔bw 20 cm
≔x =⋅⋅1.25 d
⎛
⎜
⎜⎝
-1
‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
-1
⎛
⎜
⎝
――――――
Msd
⋅⋅⋅0.425 fcd bw d2
⎞
⎟
⎠
⎞
⎟
⎟⎠
10.792 cm
≔fyk 500 MPa
≔xlim =⋅0.628 d 39.564 cm ≔fyd =――
fyk
1.15
43.478 ――
kN
cm 2
≔As =―――――
⋅⋅⋅0.68 fcd bw x
fyd
9.645 cm 2
≔ρmin 0.179 ≔ϕ
⎛
⎜
⎝
―
π
4
⎞
⎟
⎠
162 mm 2
≔Asmin =⋅⋅――
ρmin
100
bw h 2.506 cm 2
≔Ba =―
As
ϕ
4.797
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