Vigas - Flexão Simples 3

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

Mu:

TQS = 1124,08 kip.inSoftware B = 1177,18 kip.inSoftware C = 1141,78 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 = 1,01 in2Software B = 1,13 in2Software C = 0,99 in2

1,00 in2 ≈ 1,01 in2 → OK!

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øMn (1118,18 kip.in) ≈ Mu (1124,08 kip.in) → OK!!


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

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0,0221 ≥ 0,005 → OK! Tension Controlled! → ø 0,90 OK!


Cortante:


TQSSoftware BSoftware C
Vu = 16,07 kipsVu = 15,66 kipsVu = 15,99 kips
Vu,design = 13,40 kipsVu,design = 13,36 kipsVu,design = 13,45 kips

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Vs ≤ Vs,lim OK!

    Ø0,75 → øVn ≥ Vu → 13,40 ≥ 13,40 → OK!!

    Área de Aço:


    96ee8f2a6c2441dc24e67616ead00ef7.png

    ec5e2b756a07c720342b191606d8fa18.png

    3839d14c2d8aa8169cf2d179395ffb2a.png

    ed95237ef0115995ec7a301fd5af9f74.png


    Espaçamento:

    06d1e07ea784adbc04a385a9e9430ab3.png

    768ddfd28d50ef4318d2281d5e15552c.png

    7f36e20ea4f55c3408bee25a219509b7.png


    øVn (23,89 kips) ≥ Vu (13,40 kips)






    Vigas - Flexão Simples 2
    Vigas - Flexão Simples 4