Sistemas

UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO
FACULTAD DE ARQUITECTURA

SISTEMAS ESTRUCTURALES
“METODO DE CROSS”

Arq. ROGELIO GARCIA TREJO

Ciclo Escolar 2012-2

4.5M2 X 800 KG.M2= 3600/3=1.2T/m
4.5M2 X 800 KG.M2= 3600/3= 1.2T/m
RESULTADO DE AREAS TRIBUTARIAS
RESULTADO DE AREAS TRIBUTARIAS

W= 1.2T/m
W= 1.2T/m


I L=2.30m
I L=2.30m
I L=2.60m
I L=2.60m
IL=3.00m
I L=3.00m

13 12.60 12.30
E

K=0.33
EK=0.33
D

K=0.33
D

K=0.33
B

K=0.33
B

K=0.33
A

K=0.33
A

K=0.33
K=0.43
K=0.43
K=0.39
K=0.39
K=0.33
K=0.33

TRAMO AB:K = 13 = 0.33
TRAMO BD: K=12.60= 0.39
TRAMO DE: K=12.30 = 0.43
TRAMO AB: K = 13 = 0.33
TRAMO BD: K=12.60= 0.39
TRAMO DE: K=12.30 = 0.43
FORMULA PARA OBTENER LOS VALORES DE K (RIGIDEZ)K=IL
FACTOR DE DISTRIBUCION:
FD =K∑F
FDA=0.330.33=1
FDBA=0.330.33 +0.39=0.330.72=0.46
FDBD=0.390.39 +0.33=0.390.72=0.54
FDDB=0.390.39 +0.43=0.390.82=0.47
FDDE=0.430.43 +0.39=0.430.82=0.52FDE=0.430.43=1

FACTOR DE DISTRIBUCION:
FD =K∑F
FDA=0.330.33=1
FDBA=0.330.33 +0.39=0.330.72=0.46
FDBD=0.390.39 +0.33=0.390.72=0.54
FDDB=0.390.39 +0.43=0.390.82=0.47
FDDE=0.430.43+0.39=0.430.82=0.52
FDE=0.430.43=1

MOMENTOS DE EMPOTRAMIENTO:

3.00
3.00

MAB=WI212=1.2Tm X 32 12 =0.9
= -0.9
= -0.9
B

K=0.33
B

K=0.33
A

K=0.33A

K=0.33

E

K=0.33
E

K=0.33
D

K=0.33
D

K=0.33


= -0.67
= -0.67

MBD=WI212=1.2Tm X 2.602 12 =0.67
2.60
2.60

DK=0.33
D

K=0.33
B

K=0.33
B

K=0.33


MDE=WI212=1.2Tm X 2.302 12 =0.23
= -0.23
= -0.23

2.30
2.30







FACTOR...