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INSTITUTO POLITECNICO NACIONAL
ESCUELA SUPERIOR DE INGENIERIA Y
ARQUITECTURA UNIDAD TECAMACHALCO
ALUMNO: GUTIERREZ JAIMEZ IVAN
GRUPO: 7AV16

TURNO: VESPERTINO

ASIGNATURA: ESTRUCTURAS METALICAS
PROFESOR: FLORES VASCONCELOS DAVID
Armadura.

5.57m

38.99m

28.14m

4.00m

8.00m
Tθ=c.o./c.a.
Tθ1=1/3.51= 15.90°
1.-Cálculo de la cubierta de láminagalvanizada.
Peso lamina = 209.70kg/m²

Tθ2=2/3.51= 29.67°
Tθ3=3/3.51= 40.52°

Peso cubierta= AT (Peso de lámina)

Tθ4=4/3.51= 48.73°

Pc= (96.19m²)(9.70 kg/m²)(1.4)

Teorema de Pitágoras

Pc=1306.26kg.

C= √a²+b²
C= √(14.07)²+(4)²
C=14.62

2.-Peso de polines (canales)

W=33.95 kg/m²

5.57m

M=WL²/8
M=(33.95 kg/m²)(5.57)/8=
M= 131.66 kg/m²
S M/Fs= S 131.66 kg/m²/25.20 kg/²
S =5.22 cm²
Sy real= 5.22 > S
Diseño AHMSA
4”-2” calibre 12
Peso= 4.57 kg/m
Peso perfil= (5.57)(4.57)
Peso perfil= 25.23 kg (10) nodos superiores
Peso perfil= 250.30kg

3.-Peso de armadura.
Cuerda inferior x1= (28.14m)(1)= 28.14m
Cuerda superior x2= (14.62m)(2)= 29.24m
Montante 1
x2= (1.00m) (2)= 2.00m
Montante 2
x2= (2.00m) (2)= 4.00m
Montante 3
x2= (3.00m) (2)= 6.00m
Diagonales 1
x2= (4.03m) (2)= 8.06m
Diagonales 2
x2=(4.61m) (2)= 9.22m
Diagonales 3
x2=(5.32m) (2)= 10.64m
Total= 97.3 m

PA=(longitud de pza.)(Peso )(2)
PA= (97.3 m)(35.12)(2)
PA= 6834.35 kg

4.-Falso plafón
Peso de falso plafón=(AT)(Peso del plafón)
Pfp= (156.73m²)(100 kg/m²)
Pfp=15673kg

AT=(28.14)(5.57)
AT=156.73 m²
Área tributaria= 156.73
Peso= 100 kg/m²

5.-Carga viva.
Tabla N.T.C.E. → 100 KG/m²
Área tributaria= 96.19m²
CV= (At)(Cv)
CV=(96.19m²)(100 kg/m²)
CV=9619 kg
6.-Carga de viento
W=0.00555 C A V²

C= 0.75

C= Factor de empuje (adm.)

A= 48.10

A= Área expuesta

V= 85 km/hra.

V= Velocidad de diseño
Wy

W= Fuerza debida al viento

W

W= 0.00555(0.75)(48.10)(85)²
W= 1446.56 kg

15.90°

Wy= W Senα
Wy= (1446.56)(Sen 15.90)
Wy= 357.54 kg
Wx= W Cosα
Wx= (1446.50)(Cos 15.90)
Wx= 1401.61kg x 1.4
Wx= 1962.20 kg
7.-instalaciones.
N.T.C.I. (2)→ 40kg/m²
Área tributaria= 156.73m²
P ins.= (40 kg/m²)(156.73)
P ins.= 6269 kg

8.-Peso total.
Peso de cubierta =2204.16 kg
Peso de perfil = 252.3 kg
Peso de armadura = 6834.35 kg
Peso de falso plafón = 15673 kg
Carga viva = 16230 kg
Wy =
357.54 kg
Peso de instalaciones = 6269 kg
Total.
47820.35
Factor de carga

=

x 1.4
66948.49 kg

Wx
9.-Peso nodos
P.N. = PT/ Nn
P.N. = 66948.49 kg/ 8
P.N. = 8368.56 kg
10.-Peso por viento horizontal.
Pw= Wx/Nnx
Pw= 1962.26/4
Pw= 490.56 kg
METODO DE NODOS

RA= Ƹf/2
RA= 8 (5TON) / 2 = 40TON /2= 20 TON

NODO C

NODO A

5 TON
CD

2.5 TON
AC

15.90°
15.90°
AJ

AC

CJ

RA

ΣFy= -2.5TON+ 20TON- AC(Sen 15.90)
ΣFy= 17.5TON- AC (0.24)
AC= 17.5TON/0.24
AC= 72.91 TON

ΣFx= -72.9TON (Cos 15.90)- CD(Cos15.90)
ΣFx= 70.64- CD (Cos 15.90)
CD = 70.64/0.96
CD= 73.58 TON

ΣFx= -72.9TON(Cos 15.90) +AJ
AJ=72.9 (0.96)
AJ= 69.98 TON

ΣFy= -5TON +72.91 (Sen 15.90)- 73.58 (Sen 15.90)+CJ
ΣFy = -5TON -18.02TON+ 18.18TON + CJ
CJ= 5.16 TON
NODO K

NODO J

KD

CJ
JD

KE

29.67

40.52.
67
KL

KJ

AJ

JK

ΣFy= -5.16TON + JD (Sen 29.67)
ΣFy= -5.16TON+ JD (0.44)
JD = 5.16/0.44
JD = 11.72 TON
ΣFx= -69.98TON +11.72TON (Cos 29.67)+JK
ΣFx = -69.98TON + 10.47TON + JK
JK= 59.51 TON

ΣFy= -7.73TON + KE (Sen40.52)
KE= 7.73TON/0.59
KE = 13.10 TON
ΣFx= -59.51TON +13.10TON (Cos 40.52)+KL
ΣFyx= -59.51TON + 10.53TON + KL
KL= 48.98 TON

NODO E
NODO D
5 TON

5 TON

EF

DE

DE

DC
JD

DK

EK

EL

ΣFx= +73.58TON (Cos 15.90)- 11.72TON (Cos29.67)DE (Cos15.90)
ΣFx= 71.29-10.47- DE (0.96)
DE = 60.82/0.96
DE= 63.35 TON

ΣFx=63.35TON (Cos 15.90)- 13.10TON (Cos40.52)EF(Cos 15.90)
ΣFx= 61.38-10.53-EF (0-96)
EF = 50.85/0.96
EF= 52.96 TON

ΣFy= -5TON -63.35TON (Sen 15.90)+ 73.58TON
(Sen 15.90)- 11.72TON (Sen29.67) +DK
ΣFy = -5TON – 15.65TON+ 18.18TON -5.26TON + DK
DK= 7.73 TON

ΣFy= -5TON +63.35TON (Sen 15.90)- 13.10TON
(Sen 40.52)- 52.96TON (Sen 15.90+ EL
ΣFy = -5TON + 15.65TON -7.78TON-13.01TON + EL
EL= 10.22 TON
NODO L
LE
LF
48.73
LK

LM

ΣFy= -10.22TON + LF (Sen48.73)
LF= 10.22TON/0.69
LF= 14.81TON
ΣFx= -48.98TON + 14.81TON (Cos 48.73)+ LM
ΣFx = -48.98TON +10.67
LM= 38.31 TON

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Metalicas

  • 1. INSTITUTO POLITECNICO NACIONAL ESCUELA SUPERIOR DE INGENIERIA Y ARQUITECTURA UNIDAD TECAMACHALCO ALUMNO: GUTIERREZ JAIMEZ IVAN GRUPO: 7AV16 TURNO: VESPERTINO ASIGNATURA: ESTRUCTURAS METALICAS PROFESOR: FLORES VASCONCELOS DAVID
  • 3. Tθ=c.o./c.a. Tθ1=1/3.51= 15.90° 1.-Cálculo de la cubierta de láminagalvanizada. Peso lamina = 209.70kg/m² Tθ2=2/3.51= 29.67° Tθ3=3/3.51= 40.52° Peso cubierta= AT (Peso de lámina) Tθ4=4/3.51= 48.73° Pc= (96.19m²)(9.70 kg/m²)(1.4) Teorema de Pitágoras Pc=1306.26kg. C= √a²+b² C= √(14.07)²+(4)² C=14.62 2.-Peso de polines (canales) W=33.95 kg/m² 5.57m M=WL²/8 M=(33.95 kg/m²)(5.57)/8= M= 131.66 kg/m²
  • 4. S M/Fs= S 131.66 kg/m²/25.20 kg/² S =5.22 cm² Sy real= 5.22 > S Diseño AHMSA 4”-2” calibre 12 Peso= 4.57 kg/m Peso perfil= (5.57)(4.57) Peso perfil= 25.23 kg (10) nodos superiores Peso perfil= 250.30kg 3.-Peso de armadura. Cuerda inferior x1= (28.14m)(1)= 28.14m Cuerda superior x2= (14.62m)(2)= 29.24m Montante 1 x2= (1.00m) (2)= 2.00m Montante 2 x2= (2.00m) (2)= 4.00m Montante 3 x2= (3.00m) (2)= 6.00m Diagonales 1 x2= (4.03m) (2)= 8.06m Diagonales 2 x2=(4.61m) (2)= 9.22m Diagonales 3 x2=(5.32m) (2)= 10.64m Total= 97.3 m PA=(longitud de pza.)(Peso )(2) PA= (97.3 m)(35.12)(2) PA= 6834.35 kg 4.-Falso plafón Peso de falso plafón=(AT)(Peso del plafón) Pfp= (156.73m²)(100 kg/m²) Pfp=15673kg AT=(28.14)(5.57) AT=156.73 m² Área tributaria= 156.73 Peso= 100 kg/m² 5.-Carga viva. Tabla N.T.C.E. → 100 KG/m² Área tributaria= 96.19m² CV= (At)(Cv) CV=(96.19m²)(100 kg/m²) CV=9619 kg
  • 5. 6.-Carga de viento W=0.00555 C A V² C= 0.75 C= Factor de empuje (adm.) A= 48.10 A= Área expuesta V= 85 km/hra. V= Velocidad de diseño Wy W= Fuerza debida al viento W W= 0.00555(0.75)(48.10)(85)² W= 1446.56 kg 15.90° Wy= W Senα Wy= (1446.56)(Sen 15.90) Wy= 357.54 kg Wx= W Cosα Wx= (1446.50)(Cos 15.90) Wx= 1401.61kg x 1.4 Wx= 1962.20 kg 7.-instalaciones. N.T.C.I. (2)→ 40kg/m² Área tributaria= 156.73m² P ins.= (40 kg/m²)(156.73) P ins.= 6269 kg 8.-Peso total. Peso de cubierta =2204.16 kg Peso de perfil = 252.3 kg Peso de armadura = 6834.35 kg Peso de falso plafón = 15673 kg Carga viva = 16230 kg Wy = 357.54 kg Peso de instalaciones = 6269 kg Total. 47820.35 Factor de carga = x 1.4 66948.49 kg Wx
  • 6. 9.-Peso nodos P.N. = PT/ Nn P.N. = 66948.49 kg/ 8 P.N. = 8368.56 kg 10.-Peso por viento horizontal. Pw= Wx/Nnx Pw= 1962.26/4 Pw= 490.56 kg
  • 7. METODO DE NODOS RA= Ƹf/2 RA= 8 (5TON) / 2 = 40TON /2= 20 TON NODO C NODO A 5 TON CD 2.5 TON AC 15.90° 15.90° AJ AC CJ RA ΣFy= -2.5TON+ 20TON- AC(Sen 15.90) ΣFy= 17.5TON- AC (0.24) AC= 17.5TON/0.24 AC= 72.91 TON ΣFx= -72.9TON (Cos 15.90)- CD(Cos15.90) ΣFx= 70.64- CD (Cos 15.90) CD = 70.64/0.96 CD= 73.58 TON ΣFx= -72.9TON(Cos 15.90) +AJ AJ=72.9 (0.96) AJ= 69.98 TON ΣFy= -5TON +72.91 (Sen 15.90)- 73.58 (Sen 15.90)+CJ ΣFy = -5TON -18.02TON+ 18.18TON + CJ CJ= 5.16 TON
  • 8. NODO K NODO J KD CJ JD KE 29.67 40.52. 67 KL KJ AJ JK ΣFy= -5.16TON + JD (Sen 29.67) ΣFy= -5.16TON+ JD (0.44) JD = 5.16/0.44 JD = 11.72 TON ΣFx= -69.98TON +11.72TON (Cos 29.67)+JK ΣFx = -69.98TON + 10.47TON + JK JK= 59.51 TON ΣFy= -7.73TON + KE (Sen40.52) KE= 7.73TON/0.59 KE = 13.10 TON ΣFx= -59.51TON +13.10TON (Cos 40.52)+KL ΣFyx= -59.51TON + 10.53TON + KL KL= 48.98 TON NODO E NODO D 5 TON 5 TON EF DE DE DC JD DK EK EL ΣFx= +73.58TON (Cos 15.90)- 11.72TON (Cos29.67)DE (Cos15.90) ΣFx= 71.29-10.47- DE (0.96) DE = 60.82/0.96 DE= 63.35 TON ΣFx=63.35TON (Cos 15.90)- 13.10TON (Cos40.52)EF(Cos 15.90) ΣFx= 61.38-10.53-EF (0-96) EF = 50.85/0.96 EF= 52.96 TON ΣFy= -5TON -63.35TON (Sen 15.90)+ 73.58TON (Sen 15.90)- 11.72TON (Sen29.67) +DK ΣFy = -5TON – 15.65TON+ 18.18TON -5.26TON + DK DK= 7.73 TON ΣFy= -5TON +63.35TON (Sen 15.90)- 13.10TON (Sen 40.52)- 52.96TON (Sen 15.90+ EL ΣFy = -5TON + 15.65TON -7.78TON-13.01TON + EL EL= 10.22 TON
  • 9. NODO L LE LF 48.73 LK LM ΣFy= -10.22TON + LF (Sen48.73) LF= 10.22TON/0.69 LF= 14.81TON ΣFx= -48.98TON + 14.81TON (Cos 48.73)+ LM ΣFx = -48.98TON +10.67 LM= 38.31 TON