Departamento Académico de Fisica

1

“Las personas no son recordadas por el número de veces que fracasan, si no por el

número de veces que tienen éxito“ T.A. Edison F-6. 6. 6. 1 12 53 2 14 52 3 16 51 4 18 50 5 20 49 6 2 48 7 11 47 8 13 46 9 15 45 10 17 44 11 19 43 12 21 42 13 1 41 14 2 40 15 3 39 16 4 38 17 5 37 18 6 36 19 7 35 20 8 34 21 9 33 22 10 32 23 2 31 24 4 30 25 6 29 26 8 28 27 10 27 28 12 26 29 1 25 30 3 24 31 5 23 32 7 22 33 9 21 34 11 20

F.6-1. Fad = 318.20 Ib = 318 Ib (C) Fab = 225 Ib (T) F bc = 225 Ib (T)

F bd = 0 Fcd = 318.20 Ib = 318 Ib (T)

F.6-2. Fcd = 500 Ib (T) F ad = 400 Ib (C)

Fbc = 500 Ib (T), FAC= = FAB = 0 F.6-3. F ae = 667 Ib (C)

FDC = 400 Ib (C) F.6-4. F a c = Fbc = 0.5774P (C) Fab = 0.2887P (T)

Si F ab = 2kN P = 6.928 kN Si Fac =F b c = 0.5774P=1.5kN P = 2.598 kN Se elige el valor mas pequeno de P. P = 2.598 kN = 2.60 kN

F.6-5. Fcb = 0 ; Fcd = 0;F ae = 0; FDe = 0 F.6-6. Fcd = 519.62 Ib = 520 Ib (C) F bc = 450 Ib (T) FBD = 0

Fde = 519.62 Ib = 520 Ib (C) FBE = 0 F ab = 450 Ib (T)

F ae = 340 Ib (C) F.6-7. F cf = 1980 Ib (T) F fe = 800 Ib (T) F bc = 2200 Ib (C) F.6-8. Fkc = 6.67 kN (C) Fcd = 6222 kN = 62.2 kN (T) F lk = 62.2 kN (C) F.6-9. Gy = 33.33 kN

φ= 56.31°. Fcd = 62.2 kN (T) F kj = 66.7 kN (C) Fkd = 8.01 kN (T)

F.6-10. φ= 60° P EF = -600 Ib = 600 Ib (C) F bc = 346.41 Ib = 346 Ib (T) F.6-11. θ= 26.57° φ= 56.31° x = 2 m Fcd = 25 kN (T) F gf = 29.3 kN (C) Fgd = 2.253 kN = 2.25 kN (T) F.6—11. FDC = 1900 Ib (C) FHI = 900 Ib (C)

F ji = 0 F.6—12. F DC = 1900 Ib (C)

FHI = 900 Ib (C) F ji = 0

SEGUNDA HOJA