Vigas - Flexão Simples - Viga Continua 6

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: 31,5 in

TQSSoftware BSoftware C
Mu+ 619,50 kip.inMu+ 597,38 kip.inMu+ 690,30 kip.in
Mu- 1185,90 kip.inMu- 1202,72 kip.inMu- 1197,41 kip.in

25fb89e34086ff9d112742c5d9b3dca8.png

Flexão+:

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As,min (ACI 318-19 – 9.6.1.2)

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TQS = 0,55 in²Software B = 0,52 in²Software C = 0,80 in²

0,55 in2 ≥ 0,55 in2 → OK!

2b17efe7a1560877f4c425823264dc1a.png

øMn (854,35 kip.in) ≥ Mu (619,50 kip.in) → OK!!


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

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Linha Neutra: 6ac3be8cfacfa15522409e46e7271906.png6ac3be8cfacfa15522409e46e7271906.png

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0,083 ≥ 0,005 → OK! Tension Controlled! → ø 0,90 OK!


Flexão-:

6a0b767240151b672008b3a19b89b9e9.png

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As,min (ACI 318-19 – 9.6.1.2)

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TQS = 0,78 in²Software B = 0,79 in²Software C = 0,80 in²

0,80 in2 ≥ 0,78 in2 → OK!

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øMn (1228,07 kip.in) ≥ Mu (1185,90 kip.in) → OK!!


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

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0,041 ≥ 0,005 → OK! Tension Controlled! → ø 0,90 OK!

Cortante:


TQSSoftware BSoftware C
Vu = 19,65 kipsVu = 19,65 kipsVu = 19,80 kips
Vu,design = 15,59 kipsVu,design = 15,72 kipsVu,design = 15,66 kips

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Vs ≤ Vs,lim OK!

    Ø0,75 → øVn ≥ Vu → 15,59 ≥ 15,59 → OK!!

    Área de Aço:


    bf1f5f3736302147921910eb87a598e8.png

    ec5e2b756a07c720342b191606d8fa18.png

    3839d14c2d8aa8169cf2d179395ffb2a.png

    ed95237ef0115995ec7a301fd5af9f74.png


    Espaçamento:

    06d1e07ea784adbc04a385a9e9430ab3.png

    21cdfa85012cb0939dbe4d296cb89d64.png

    7f36e20ea4f55c3408bee25a219509b7.png


    øVn (51,37 kips) ≥ Vu (15,59 kips)






    Vigas - Flexão Simples - Viga Continua 5
    Vigas - ACI Example - Continous Beam