Vigas - Flexão Simples - Viga Continua 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

TQSSoftware BSoftware C
Mu+ 681,45 kip.inMu+ 684,11 kip.inMu+ 641,63 kip.in
Mu- 1247,85 kip.inMu- 1258,47 kip.inMu- 1162 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 = 0,60 in²Software B = 0,64 in²Software C = 0,58 in²

0,60 in2 ≥ 0,60 in2 → OK!

8ae5abde2d1d9fab05df55f3a1667afc.png

øMn (685,20 kip.in) ≥ Mu (681,45 kip.in) → OK!!


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

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0,0393 ≥ 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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TQS = 1,13 in²Software B = 1,17 in²Software C = 1,05 in²

1,24 in2 ≥ 1,13 in2 → OK!

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øMn (1364,63 kip.in) ≥ Mu (1247,85 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!

Cortante:


TQSSoftware BSoftware C
Vu = 19,47 kipsVu = 19,13 kipsVu = 19,20 kips
Vu,design = 16,87 kipsVu,design = 16,98 kipsVu,design = 16,54 kips

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Vs ≤ Vs,lim OK!

    Ø0,75 → øVn ≥ Vu → 16,87 ≥ 16,87 → OK!!

    Área de Aço:


    a56eea3aa8f284873a1fe4c4b6a7c975.png

    ec5e2b756a07c720342b191606d8fa18.png

    3839d14c2d8aa8169cf2d179395ffb2a.png

    8b3d6e4e7ae87a4388c5fcd7de6c4c62.png


    Espaçamento:

    06d1e07ea784adbc04a385a9e9430ab3.png

    db58605f27fd576a1b05635291f64b6d.png

    7f36e20ea4f55c3408bee25a219509b7.png


    øVn (38,04 kips) ≥ Vu (16,87 kips)






    Vigas - Flexão Simples - Viga Continua 2
    Vigas - Flexão Simples - Viga Continua 4