Vigas - Flexão Simples - Viga Continua 4

FLEXÃO SIMPLES

Neste exemplo, será dimensionada a armadura longitudinal e transversal de uma viga submetida a Flexão Simples utilizando como base a Norma Cirsoc-2005, conforme dados abaixo:

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Concreto: H-25 / Aço: ADN420

bw: 20 cm / h: 80 cm


TQSMu+ 19 kN.m / Mu- 35 kN.mSoftware BMu+ 17,4 kN.m / Mu- 35,3 kN.mSoftware CMu+ 19,5 kN.m / Mu- 34,8 kN.m

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Flexão+:


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TQS = 3,36 cm2Software B = 0,79 cm2Software C = 5,17 cm2

3,39 cm² ≥ 3,36 cm² → OK!!

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øMn (96,23 KN.m) ≥ Mu (19,00 KN.m) → OK!!

Flexão-:


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TQS = 1,62 cm2Software B = 1,61 cm2Software C = 5,17 cm2

2,36 cm² ≥ 1,62 cm² → OK!!

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øMn (67,56 KN.m) ≥ Mu (35,00 KN.m) → OK!!

Cortante:

TQSSoftware BSoftware C
Vu = 3,68 tVu,design = 2,46 tVu = 3,52 tVu,design = 2,56 tVu = 3,54 tVu,design = 2,40 t

eacaea16320d627a489d6de817affb32.png 7bb367397cb7c88332f5a35676605d1d.png c618dc1ed89f9aae281a75842335a37f.png 5cddcc5007a75fa2093130331da3fd7a.png

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62c10ce43d27d61c466867e61c9e123b.png62c10ce43d27d61c466867e61c9e123b.png OK!

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Ø0,75 → øVn ≥ Vu → 2,46 ≥ 2,46 → OK!!

Área de Aço:

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1a5b39d95181673f2a90c0c8c79359af.png1a5b39d95181673f2a90c0c8c79359af.png0,00 ≤ 1,55 → Adotado 4ab3c11a642ded3c352fedae41c99a35.png!!

Espaçamento:

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Øt = 6 mm → Av = 1,60 cm²/m → ø6 c/ 35 cm

    øVn (13,50 t) ≥ Vu (2,46 t) → OK!!


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