Vigas - Flexão Simples 10

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

Mu:

TQS = 306,0 kN.mSoftware B = 310,8 kN.mSoftware C = 307,4 kN.m

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Flexão:


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TQS = 11,44 cm2Software B = 11,89 cm2Software C = 10,26 cm2

11,44 cm² ≥ 5,09 cm² → OK!!

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øMn (321,12 KN.m) ≥ Mu (306,00 KN.m) → OK!!

Cortante:

TQSSoftware BSoftware C
Vu = 36,45 tVu = 33,49 tVu = 36,35 t
Vu,design = 22,36 tVu,design = 22,31 tVu,design = 22,10 t

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Ø0,75 → øVn ≥ Vu → 22,36 ≥ 22,36 → OK!!

Área de Aço:

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Espaçamento:

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Øt = 8 mm → Av = 5,56 cm²/m → ø8 c/ 18 cm

    øVn (22,93 t) ≥ Vu (22,36 t) → OK!!



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