Ssdfds
Páginas: 2 (290 palabras)
Publicado: 6 de agosto de 2010
ALUMNO: CONDORI TITO HERNAN DAVID
1. HALLAR LAS REACCIONES
15010,8,4-(0,8,0)116f(x)=150(10)116= 139.27
f(z)=150(4)116= 55.71
20010,8,0-(10,0,4)80
f(y)=200(8)80= 178.88
f(z)=200(-4)80= -89.4435010,0,4-(0,0,0)116
f(x)=350(10)116= 324.97
f(z)=350(4)116= 129.99
∑Fx=0
Rx + 324.97 + 139.27 = 0
Rx = -464.24
∑Fy = 0
Ry +178.88 = 0
Ry = -178.88
∑Fz = 0
55.71 + 129.99 – 89.44 – Rz = 0
-96.26 = Rz
2. HALLAR LAS REACCIONES15010,7,4-(0,7,0)116
f(x)=150(10)116= 139.27
f(z)=150(4)116= 55.71
20010,7,0-(10,0,4)65
f(y)=200(7)65= 173.65
f(z)=200(-4)65=-99.23
35010,0,4-(0,0,0)116
f(x)=350(10)116= 324.97
f(z)=350(4)116= 129.99
∑Fx=0
Rx + 139.27 + 324.97 = 0
Rx =-464.24
∑Fy = 0
Ry + 173.65 = 0
Ry = -173.65
∑Fz = 0
55.71 – 99.23 + 129.99 - Rz = 0
-86.47 = Rz
3. HALLAR LASREACCIONES
∑Fx=0
Rx – 128.05 + 128.05 = 0
Rx = 0
∑Fy = 0
Ry + Ry – 100 – 150 – 350 + 2(153.63) - 150 = 0
2Ry = 442.74
Ry= 221.37
4. HALLAR LOS MOMENTOS Mx,My,Mz
Mx = Fydz + Fzdy
Mx = 173.66 (4) + 557.22 (4)
Mx = 2923.52
My = Fxdz +Fzdx
My = 208.01 (4) – 477.62 (4) – 318.41 (6)
My = -2988.9
Mz = Fxdy + Fydx
Mz = 557.22 (6) + 75.93 (6)
Mz = 3798.9
Leer documento completo
Regístrate para leer el documento completo.