Diseño de viga

4. En el siguiente ejercicio diseñar a flexión y corte la viga doblemente armada con las solicitaciones dadas:

• Determinar los diagramas de fuerzas cortantes últimas y momentos flectores últimos.
• Planos estructurales dibujados en Autocad en lámina A2 o A3 con Escala.
• Cantidad de refuerzo y de materiales.

Datos:

• f’c = 350 kg/cm2
• Fy =4200 kg/cm2
• ε = 0,003 mm/mm
• rec = 4,0
• qcm(*) = 3,8 tn/m*
• qcv = 2,7 tn/m
• Código de diseño = ACI 318-19

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1. Cálculo de momento y cortantes máximos

Se adoptó una sección inicial de 35x55 para las vigas.

Cálculo del ppv.

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Diagrama de la estructura en Sapp2000

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Calculo de la envolvente de momentos.

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Diagrama de corte.

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Diagrama de momentos.

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Momento ultimo.

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1. Cálculo del Ru

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1. Verificar si se puede VSA.

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1. Diseño a flexión de la VDA

1. Mn1

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1. As1

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1. Mn2

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1. As2

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1. Caso 1

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1. As

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Recalculando As y As’

1. Mn1

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1. As1

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1. Mn2

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1. As2

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1. Caso 1

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1. As

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1. Calculo As min

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1. Smax, Smin, Scal

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1. Comprobación

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As es la zona plástica

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Caso 2

A’s está en zona Elástica

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1. Cálculo del Mu+

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1. Comprobaciones

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1. Cuantía

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1. Deformaciones

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1. Diseño a corte

Caso Critico

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Cálculo de estribos

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Cálculo del Smax a Vs

Según el ACI 318-19

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