Vigas - Flexão Simples - Viga Continua 1

FLEXÃO SIMPLES

Neste exemplo, será dimensionada a armadura longitudinal e transversal de uma viga submetida a Flexão Simples utilizando como base a Norma ACI318-19, conforme dados abaixo:

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Concreto - C25 (4000 psi) / Aço – ADN420 (60 ksi)

bw: 8 in / h: 24 in

TQSSoftware BSoftware C
Mu+ 124 kip.inMu+ 124 kip.inMu+ 115,05 kip.in
Mu- 230,1 kip.inMu- 227,5 kip.inMu- 223,91 kip.in


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Flexão+:

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As,min (ACI 318-19 – 9.6.1.2)

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TQS = 0,15 in²Software B = 0,14 in²Software C = 0,60 in²

0,22 in2 ≥ 0,15 in2 → OK!

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øMn (256,96 kip.in) ≥ Mu (124,00 kip.in) → OK!!


Verificação do fator de redução (ACI318-19 – 21.2.2)

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0,02 ≥ 0,005 → OK! Tension Controlled! → ø 0,90 OK!


Flexão-:

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As,min (ACI 318-19 – 9.6.1.2)

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23b9f699e06c2187f7bd94b2549b3290.png

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TQS = 0,27 in²Software B = 0,26 in²Software C = 0,60 in²

0,33 in2 ≥ 0,27 in2 → OK!

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øMn (383,28 kip.in) ≥ Mu (230,10 kip.in) → OK!!


Verificação do fator de redução (ACI318-19 – 21.2.2)

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0,13 ≥ 0,005 → OK! Tension Controlled! → ø 0,90 OK!

Cortante:


TQSSoftware BSoftware C
Vu = 5,59 kipsVu = 5,49 kipsVu = 5,64 kips
Vu,design = 4,41 kipsVu,design = 3,16 kipsVu,design = 4,41 kips

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Vs ≤ Vs,lim OK!

    Ø0,75 → øVn ≥ Vu → 4,41 ≥ 4,41 → OK!!

    Área de Aço:


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    3839d14c2d8aa8169cf2d179395ffb2a.png

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    Espaçamento:

    06d1e07ea784adbc04a385a9e9430ab3.png

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    øVn (38,14 kips) ≥ Vu (4,41 kips)






    Vigas - Flexão Simples - Balanço 3
    Vigas - Flexão Simples - Viga Continua 2