Vigas - Flexão Simples - Viga Continua 2

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+ 274,35 kip.inMu+ 268,16 kip.inMu+ 250,46 kip.in
Mu- 495,60 kip.inMu- 492,06 kip.inMu- 487,64 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 = 0,32 in²Software B = 0,31 in²Software C = 0,60 in²

0,33 in2 ≥ 0,32 in2 → OK!

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øMn (383,28 kip.in) ≥ Mu (274,35 kip.in) → OK!!


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

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0,10 ≥ 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 = 0,58 in²Software B = 0,57 in²Software C = 0,60 in²

0,60 in2 ≥ 0,58 in2 → OK!

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øMn (685,20 kip.in) ≥ Mu (495,60 kip.in) → OK!!


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

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0,056 ≥ 0,005 → OK! Tension Controlled! → ø 0,90 OK!

Cortante:


TQSSoftware BSoftware C
Vu = 12,26 kipsVu = 11,90 kipsVu = 12,30 kips
Vu,design = 9,68 kipsVu,design = 9,74 kipsVu,design = 9,70 kips

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Vs ≤ Vs,lim OK!

    Ø0,75 → øVn ≥ Vu → 9,68 ≥ 9,68 → OK!!

    Área de Aço:


    96ee8f2a6c2441dc24e67616ead00ef7.png

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    3839d14c2d8aa8169cf2d179395ffb2a.png

    ed95237ef0115995ec7a301fd5af9f74.png


    Espaçamento:

    06d1e07ea784adbc04a385a9e9430ab3.png

    db58605f27fd576a1b05635291f64b6d.png

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    øVn (38,14 kips) ≥ Vu (9,68 kips)






    Vigas - Flexão Simples - Viga Continua 1
    Vigas - Flexão Simples - Viga Continua 3