proyecto de acero






Cubierta LAMILIT 27
Peso por m2 4.8 kg
Separación maxima entre correas 1.7m



Análisis de Carga


1) Carga Permanente (CP)Cubiertas 4.8 kg/m2 *1.7m 8.16 kg/ml
Peso Propio Correa 10.0 kg/ml
Cielo Razo 10kg/m2 * 1.7m 17.0 kg/ml

TOTAL= 35.16 kg/ml

Wcpy = 35.16*cosα
Wcpy = 35.16*0.98
Wcpy = 34.48 kg/ml

Wcpx = 35.16*senα
Wcpx = 35.16*0.20
Wcpx= 6.9 kg/ml



2)Carga Variable (viento)

P = 1.2 senα q
P = 1.2 (0.2) (100)
P = 24 < Pmin=60 P = 60 kg/m2

Wcv = P*S
Wcv = 60 * 1.7
Wcv = 102 kg/ml





TOTAL

Wy = 102 + 34.48 = 136.48≈ 137 kg/ml
Wx = 6.9 ≈ 7 kg/ml




Analisis ASD (Esf Admisibles)Calculo de Correas

1) Por Resistencia (ASD)

f = (Mxmax /Sx) + (Mymax /Sy)

Asumo:
ECO 120 x 60
Sx = 26.55
Sy = 18.22
Fy = 3515
Fadm = 0.72 Fy

f = (362*100 /26.55) +(18.5* 100/18.22) = 1455 Kg/cm2

Fadm = 0.72 * 3515 = 2530.8 Kg/cm2

f < Fadm

2) Por Flecha
Yadm = L/200 Yadm = 2.5 cm
Ix = 159.29=




+


Y1 = 5 W4 / 384 EI Y2 = Ml2 /16 EI
Y1 =5(137)(5004)/384(3.35*1010) Y2 = 362(5002)(100)/16(3.35*108)
Y1 = 3.3 cm Y2 = 1.69


Y´=Y1 – Y2 Y´= 1.61 < Yadm


Calculode la Cercha

1) Carga Permanente

Peso Propio Cercha 50 Kg/ml x 20 = 1000 Kg
Cubierta 4.8 x 5 x 10.2 x 2 = 489.6 Kg
Correas...