Prediseño Vigas De Hormigón Armado.xlsx

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PREDISEÑO VIGAS DE HORMIGÓN ARMADO Hormigón armado f´c = 210 kg/cm2 fy= Luz máx. = Área colaborante =

4200 kg/cm2 6.87 m 11.50 m2

(13.72 m , L= 6m *en no accesible) 2

Mampostería =

0.20 T/m2

Losa de 20cm (bloque e15) =

0.43 T/m2

0.1040*2.4 + 8*0.013 +0.04*2

PP viga =

0.14 T/m2

0.20*0.30*6.87 -> 0.06*2.4 = 0.144 T/m

Carga Permanente =

0.78 T/m2

Carga Viva =

0.20 T/m2

Carga Última (U=1.2D+1.6L) = qu(sismo) = 1.5*qu =

1.48 T/m2 2.23 T/m2 3.73 T/m

Viga larga carga distribuida = Mu =q*L2/8

Ru=ρ*fy*(1-0.588*ρ*fy/f´c) ρ=0.5*ρbal

21.99 T*m

39.72 0.010838

280

0.85

0.85

350

0.80

0.021675

420

0.70

β1 = ρbal = 0.85*β1* f´c/fy *6300/(6300+fy)

β1

f´c

base (b) = Fator de resistencia a flexion (ø) = Calcilo de altura (d) = √(Mu/(ø*Ru*b) = Recublimiento = H=

30 cm 0.9 45 cm 2 cm 48 cm

48

30

2.4 + 8*0.013 +0.04*2

0*6.87 -> 0.06*2.4 = 0.144 T/m 2

ACI 318-15

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