Calculo decerchas de galpon
eduard654Documentos de Investigación1 de Mayo de 2018
3.149 Palabras (13 Páginas)211 Visitas
[pic 1][pic 2]
[pic 3]
[pic 4]
Cubierta LAMILIT 27
Peso por m2 4.8 kg[pic 5]
Separación maxima entre correas 1.7m[pic 6]
- Análisis de Carga
- Carga Permanente (CP)
Cubiertas 4.8 kg/m2 *1.7m 8.16 kg/ml[pic 7][pic 8]
Peso Propio Correa 10.0 kg/ml[pic 9]
Cielo Razo 10 kg/m2 * 1.7m 17.0 kg/ml[pic 10][pic 11]
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
- Carga Variable (viento)
P = 1.2 senα q
P = 1.2 (0.2) (100)
P = 24 < Pmin=60 P = 60 kg/m2[pic 12]
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
[pic 13]
- Analisis ASD (Esf Admisibles)
[pic 14]
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- 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 [pic 56]
Ix = 159.29
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+[pic 71][pic 72][pic 73][pic 74][pic 75][pic 76]
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
- Calculo de la Cercha
1) Carga Permanente
Peso Propio Cercha 50 Kg/ml x 20 = 1000 Kg[pic 77]
Cubierta 4.8 x 5 x 10.2 x 2 = 489.6 Kg[pic 78]
Correas 6.70 x 14 = 93.8 Kg[pic 79]
Cielo Razo 10 x 5 x 20 = 1000 Kg[pic 80]
TOTAL = 2582 Kg
[pic 81]
215 Nodo Interno[pic 82]
Carga por Nodo = 2582/ 12 = 215
- Nodo Externo[pic 83]
[pic 84]
215 x 1.2 = 258 P [pic 85]
Carga por Nodo Mayorada
108 x 1.2 = 130 P/2[pic 86]
[pic 87]
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P= 258
P/2 = 130
2) Carga de Viento
P=1.2senα q P=1.2(0.20)(100) P = 24 < 60 P=60kg/m2[pic 141][pic 142][pic 143]
Pcv = 60 x 5 x 10.2 = 3060
[pic 144]
510 Nodo Interno [pic 145]
Carga por Nodo= 3060/6 = 510
255 Nodo Externo[pic 146]
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