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PREDIMENSIONAMIENTO DE VIGAS DE CARGA
Vigas de Carga de Entrepiso:
VC – A; 3 - 4 - 7 - 10
h = 𝐿 𝑚𝑎𝑦𝑜𝑟
= 0.32 ≈ 0.35m
b = 50% h x b = 0.50 x 35 = 0.17 ≈ 0.20m As min: 14 𝑥 𝑏 𝑥 𝑑 4200𝑘𝑔/𝑐𝑚
14 𝑥 20 𝑥 30 4200𝑘𝑔/𝑐𝑚
= 2.00cm^2 ≈ 2#4 (2.54cm^2 )
Anclaje: 12 x 1.27cm^2 = 15.24 = 0.15cm Secciones: VC; 3 – 4 – 7 – 10 0.15 + 2.65 + 3.35 + 4.00 + 0.15 = 10.30m Estribos: 0.10 x 4 + 0.25 x 2 = 0.90m Est. # Separacion Estribos: (^34 7 ) 2.65 3.35 4. Tramo 3 - 4 L1 =
- 65 4 = 0.66m Tramo 3 - 4 L2 =
- 65 2 = 1.32m Tramo 4 - 7 L1 =
- 35 4 = 0.83m Tramo 4 - 7 L2 =
- 35 2 = 1.67m Tramo 7 - 10 L1 =
- 00 4 = 1.00m Tramo 7 - 10 L2 =
- 00 2 = 2.00m
S-1 =
30 4
= 7.50 ≈ @0.075 S- 2 =
30 2
VC – B; 7 – 8 – 10
h = 𝐿 𝑚𝑎𝑦𝑜𝑟
= 0.21 ≈ 0.25m
b = 50% h x b = 0.50 x 25 = 0.12 ≈ 0.20m As min: 14 𝑥 𝑏 𝑥 𝑑 4200𝑘𝑔/𝑐𝑚
14 𝑥 20 𝑥 20 4200𝑘𝑔/𝑐𝑚
= 1.33cm^2 ≈ 2#4 (2.54cm^2 )
Anclaje: 12 x 1.27cm^2 = 15.24 = 0.15cm Secciones: VC; 7 – 8 – 10 0.15 + 1.31 + 2.68 + 0.15 = 4.29m Estribos: 0.10 x 4 + 0.15 x 2 = 0.70m Est. # Separacion Estribos: 7 8 10 1.31 2. Tramo 7 - 8 L1 =
- 31 4 = 0.32m Tramo 7 - 8 L2 =
- 31 2 = 0.65m Tramo 8 - 10 L1 =
- 68 4 = 0.67m Tramo 8 - 10 L2 =
- 68 2 = 1.34m
S-1 =
20 4
= 5.00 ≈ @0.05 S- 2 =
20 2
VC – D; 4 – 10
h = 𝐿 𝑚𝑎𝑦𝑜𝑟
= 0.15 ≈ 0.20m
b = 50% h x b = 0.50 x 0.15 = 0.10 ≈ 0.20m As min: 14 𝑥 𝑏 𝑥 𝑑 4200𝑘𝑔/𝑐𝑚
14 𝑥 20 𝑥 20 4200𝑘𝑔/𝑐𝑚
= 1.33cm^2 ≈ 2#4 (2.54cm^2 )
Anclaje: 12 x 1.27cm^2 = 15.24 ≈ 0.15cm Secciones: VC; 4 – 10 0.15 + 1.95 + 0.15 = 2.25m Estribos: 0.10 x 6 = 0.60m Est. # Separación Estribos:
(^4 ) Tramo 1 - 3 L1 =
- 95 4 = 0.48m Tramo 1 - 3 L2 =
- 95 2 = 0.97m
S-1 =
15 4
= 3.75 ≈ @0.05 S-2 =
15 2
VC – E; 1 - 2 - 4 - 7 - 9 - 10
h = 𝐿 𝑚𝑎𝑦𝑜𝑟
- 50
- 70
- 50
b = 50% h x b = 0.50 x 30 = 0.15 ≈ 0.20m As min: 14 𝑥 𝑏 𝑥 𝑑 4200𝑘𝑔/𝑐𝑚
14 𝑥 20 𝑥 25 4200𝑘𝑔/𝑐𝑚
= 1.66cm^2 ≈ 2#4 (2.54cm^2 )
Anclaje: 12 x 1.27cm^2 = 15.24 ≈ 0.15cm Solape: 30 x 1.27cm^2 = 38.10 ≈ 0.40cm Secciones: VC; 1 – 2 – 4 ; 7 – 9 – 10 0.15 + 1.20 + 3.70 + 0.20 = 5.25m 0.20 + 3.35 + 2.05 + 1.95 + 0.15 = 7.70m Estribos: 0.10 x 3 + 0.20 x 2 = 0.80m Est. # Separación Estribos: 1 2 4 7 1.20 3.70 3. Tramo 1 - 2 L1 =
- 20 4 = 0.30m Tramo 1 - 2 L2 =
- 20 2 = 0.60m Tramo 2 - 4 L1 =
- 70 4 = 0.92m Tramo 2 - 4 L2 =
- 70 2 = 1.85m Tramo 4 - 7 L1 =
- 35 4 = 0.83m Tramo 4 - 7 L2 =
- 35 2 = 1.67m
S-1 =
25 4
= 6.25 ≈ @0.0 5 S-2 =
25 2
9 2.05 1. 10
VC – G; 2 – 4 – 5
h = 𝐿 𝑚𝑎𝑦𝑜𝑟
b = 50% h x b = 0.50 x 30 = 0.15 ≈ 0.20m As min: 14 𝑥 𝑏 𝑥 𝑑 4200𝑘𝑔/𝑐𝑚
14 𝑥 20 𝑥 25 4200𝑘𝑔/𝑐𝑚
= 1.66cm^2 ≈ 2#4 (2.54cm^2 )
Anclaje: 12 x 1.27cm^2 = 15.24 ≈ 0.15cm Secciones: Tramo 2 - 4 L1 =
- 70 4 = 0.92m Tramo 2 - 4 L2 =
- 70 2 = 1.85m Tramo 4 - 7 L1 =
- 35 4 = 0.83m Tramo 4 - 7 L2 =
- 35 2 = 1.67m Tramo 8 - 9 L1 =
- 74 4 = 0.13m Tramo 8 - 9 L2 =
- 74 2 = 0.65m Tramo 9 - 10 L1 =
- 95 4 = 0.48m Tramo 9 - 10 L2 =
- 95 2 = 0.97m Tramo 7 - 8 L1 =
- 31 4 = 0.32m Tramo 7 - 8 L2 =
- 35 2 = 0.65m Tramo 10 - 11 L1 =
- 63 4 = 0.65m Tramo 10 - 11 L2 =
- 63 2 = 1.31m 2 4 5 3.70 1.
VC; 2 – 4 – 5
0.15 + 3.70 + 1.35 + 0.15 = 5.35m Estribos: 0.10 x 3 + 0.20 x 2 = 0.80m Est. # Separación Estribos:
VC – H; 5 – 9 – 11
h = 𝐿 𝑚𝑎𝑦𝑜𝑟
= 0.36 ≈ 0.35m
b = 50% h x b = 0.50 x 35 = 0.17 ≈ 0.20m As min: 14 𝑥 𝑏 𝑥 𝑑 4200𝑘𝑔/𝑐𝑚
14 𝑥 20 𝑥 30 4200𝑘𝑔/𝑐𝑚
= 2.00cm^2 ≈ 2#4 (2.54cm^2 )
Anclaje: 12 x 1.27cm^2 = 15.24 ≈ 0.15cm Secciones: VC; 5 – 9 – 11 Tramo 2 - 4 L1 =
- 70 4 = 0.92m Tramo 2 - 4 L2 =
- 70 2 = 1.85m Tramo 4 - 5 L1 =
- 35 4 = 0.33m Tramo 4 - 5 L2 =
- 35 2 = 0.67m
S-1 =
25 4
= 6.25 ≈ @0.0 5 S-2 =
25 2
5 9 11 4.05 4.
Secciones: VC; 2 – 4 0.15 + 5.30 + 0.15 = 5.60m Estribos: 0.10 x 4 + 0.30 x 2 = 1.00m Est. # Separación Estribos:
VC – B; 4 – 5 – 6
h = 𝐿 𝑚𝑎𝑦𝑜𝑟
b = 50% h x b = 0.50 x 30 = 0.15 ≈ 0.20m As min: 14 𝑥 𝑏 𝑥 𝑑 4200𝑘𝑔/𝑐𝑚
14 𝑥 20 𝑥 25 4200𝑘𝑔/𝑐𝑚
= 1.66cm^2 ≈ 2#4 (2.54cm^2 )
Anclaje: 12 x 1.27cm^2 = 15.24 ≈ 0.15cm Tramo 2 - 4 L1 =
- 30 4 = 1.32m Tramo 1 - 3 L2 =
- 30 2 = 2.65m
S-1 =
35 4
= 8.75 ≈ @0.075 S-2 =
35 2
4 5 6 3.80 3.
Secciones: VC; 4 – 5 – 6 0.15 + 3.80 + 3.05 + 0.15 = 7.15m Estribos: 0.10 x 3 + 0.20 x 2 = 0.80m Est. # Separación Estribos:
VC – C = VC – D; 2 - 4 - 5 - 6
h = 𝐿 𝑚𝑎𝑦𝑜𝑟
= 0.42 ≈ 0.40m
b = 50% h x b = 0.50 x 0.40 = 0. As min: 14 𝑥 𝑏 𝑥 𝑑 4200𝑘𝑔/𝑐𝑚
14 𝑥 20 𝑥 35 4200𝑘𝑔/𝑐𝑚
= 2.33cm^2 ≈ 2#4 (2.54cm^2 )
Tramo 4 - 5 L1 =
- 80 4 = 0.95m Tramo 4 - 5 L2 =
- 80 2 = 1.90m Tramo 5 - 6 L1 =
- 05 4 = 0.76m Tramo 4 - 5 L2 =
- 05 2 = 1.52m
S-1 =
25 4
= 6.25 ≈ @0.0 5 S-2 =
25 2
2 4 5 6 5.30 3.80 (^) 3.
As min: 14 𝑥 𝑏 𝑥 𝑑 4200𝑘𝑔/𝑐𝑚
14 𝑥 25 𝑥 45 4200𝑘𝑔/𝑐𝑚
= 3.75cm^2 ≈ 3#4 (3.81cm^2 )
Anclaje: 12 x 1.27cm^2 = 15.24 ≈ 0.15cm Secciones: VC; 3 – 5 0.15 + 5.95 + 0.15 = 6.25m Estribos: 0.10 x 2 + 0.15 x 2 + 0.40 x 2 = 1.30m Est. # Separación Estribos:
VC – E^1 = VC – F; 1 – 3
h = 𝐿 𝑚𝑎𝑦𝑜𝑟
b = 50% h x b = 0.50 x 30 = 0.15 ≈ 0.20m As min: 14 𝑥 𝑏 𝑥 𝑑 4200𝑘𝑔/𝑐𝑚
14 𝑥 20 𝑥 25 4200𝑘𝑔/𝑐𝑚
= 1.66cm^2 ≈ 2#4 (2.54cm^2 )
Tramo 3 - 5 L1 =
- 95 4 = 1.48m Tramo 3 - 5 L2 =
- 95 2 = 2.97m
S-1 =
45 4
= 11.25 ≈ @0.10 S-2 =
45 2
(^1 )
Anclaje: 12 x 1.27cm^2 = 15.24 ≈ 0.15cm Secciones: VC; 1 – 3 0.15 + 3.75 + 0.15 = 4.05m Estribos: 0.10 x 3 + 0.20 x 2 = 0.80m Est. # Separación Estribos:
PREDIMENSIONAMIENTO DE VIGAS DE AMARRE
Vigas de Amarre de Entrepiso:
VA – 1; C - E
h = 𝐸𝑠𝑝 𝑑𝑒 𝑙𝑜𝑠𝑎 = 0.
b = 𝐶𝑜𝑙𝑢𝑚𝑛𝑎 𝑚𝑎𝑦𝑜𝑟 = 0.20m
As min: 14 𝑥 𝑏 𝑥 𝑑 4200𝑘𝑔/𝑐𝑚
14 𝑥 20 𝑥 25 4200𝑘𝑔/𝑐𝑚
= 1.66cm^2 ≈ 2#4 (2.54cm^2 )
Anclaje: 12 x 1.27cm^2 = 15.24 ≈ 0.15cm
S-1 =
25 4
= 6.25 ≈ @0.0 5 S-2 =
25 2
Tramo 1 - 5 L1 =
- 75 4 = 0.93m Tramo 1 - 3 L2 =
- 75 2 = 1.87m
C (^) E
Estribos: 0.10 x 3 + 0.20 x 2 = 0.80m Est. # Separación Estribos:
VA – 3; A – C
h = 𝐸𝑠𝑝 𝑑𝑒 𝑙𝑜𝑠𝑎 = 0.
b = 𝐶𝑜𝑙𝑢𝑚𝑛𝑎 𝑚𝑎𝑦𝑜𝑟 = 0.20m
As min: 14 𝑥 𝑏 𝑥 𝑑 4200𝑘𝑔/𝑐𝑚
14 𝑥 20 𝑥 25 4200𝑘𝑔/𝑐𝑚
= 1.66cm^2 ≈ 2#4 (2.54cm^2 )
Anclaje: 12 x 1.27cm^2 = 15.24 ≈ 0.15cm Secciones: VA; A – C 0.15 + 4.15 + 0.15 = 5.60m Tramo E-F L1 =
- 80 4 = 0.95m Tramo E-F L2 =
- 80 2 = 1.90m Tramo F-G L1 =
- 05 4 = 0.76m Tramo F-G L2 =
- 05 2 = 1.52m
S-1 =
25 4
= 6.25 ≈ @0.0 5 S-2 =
25 2
A (^) C
Estribos: 0.10 x 3 + 0.20 x 2 = 0.80m Est. # Separación Estribos:
VC – 4; A - C - D - E - F - H
h = 𝐸𝑠𝑝 𝑑𝑒 𝑙𝑜𝑠𝑎 = 0.
b = 𝐶𝑜𝑙𝑢𝑚𝑛𝑎 𝑚𝑎𝑦𝑜𝑟 = 0.30m
As min: 14 𝑥 𝑏 𝑥 𝑑 4200𝑘𝑔/𝑐𝑚
14 𝑥 30 𝑥 25 4200𝑘𝑔/𝑐𝑚
= 2.50cm^2 ≈ 2#4 (2.54cm^2 )
Anclaje: 12 x 1.27cm^2 = 15.24 ≈ 0.15cm Solape: 30 x 1.27cm^2 = 38.10 ≈ 0.40cm Secciones: VA; A – C – D; E – F – H 0.15 + 4.15 + 3.15 + 0.20 = 7.65m 0.20 + 2.15 + 3.80 + 3.05 + 0.15 = 9.35m
S-1 =
25 4
= 6.25 ≈ @0.0 5 S-2 =
25 2
Tramo A-C L1 =
- 15 4 = 1.32m Tramo A-C L2 =
- 15 2 = 2.07m A^ C^ D^ E 4.15 3.15 (^) 2. F 3.80 (^) 3. H
As min: 14 𝑥 𝑏 𝑥 𝑑 4200𝑘𝑔/𝑐𝑚
14 𝑥 20 𝑥 25 4200𝑘𝑔/𝑐𝑚
= 1.66cm^2 ≈ 2#4 (2.54cm^2 )
Anclaje: 12 x 1.27cm^2 = 15.24 ≈ 0.15cm Secciones: VA; G – H 0.15 + 1.95 + 0.15 = 2.25m Estribos: 0.10 x 3 + 0.20 x 2 = 0.80m Est. # Separación Estribos:
VA – 6; A – B – C
h = 𝐸𝑠𝑝 𝑑𝑒 𝑙𝑜𝑠𝑎 = 0.
b = 𝐶𝑜𝑙𝑢𝑚𝑛𝑎 𝑚𝑎𝑦𝑜𝑟 = 0.20m
As min: 14 𝑥 𝑏 𝑥 𝑑 4200𝑘𝑔/𝑐𝑚
14 𝑥 20 𝑥 25 4200𝑘𝑔/𝑐𝑚
= 1.66cm^2 ≈ 2#4 (2.54cm^2 )
Anclaje: 12 x 1.27cm^2 = 15.24 ≈ 0.15cm
S-1 =
25 4
= 6.25 ≈ @0.0 5 S-2 =
25 2
Tramo G-H L1 =
- 95 4 = 0.48m Tramo G-H L2 =
- 95 2 = 0.97m A^ B^ C 3.55 0.
Secciones: VA; A – B – C 0.15 + 3.55 + 0.60 + 0.15 = 4.45m Estribos: 0.10 x 3 + 0.20 x 2 = 0.80m Est. # Separación Estribos:
VA – 7; D – E – F – H
h = 𝐸𝑠𝑝 𝑑𝑒 𝑙𝑜𝑠𝑎 = 0.
b = 𝐶𝑜𝑙𝑢𝑚𝑛𝑎 𝑚𝑎𝑦𝑜𝑟 = 0.20m
As min: 14 𝑥 𝑏 𝑥 𝑑 4200𝑘𝑔/𝑐𝑚
14 𝑥 20 𝑥 25 4200𝑘𝑔/𝑐𝑚
= 1.66cm^2 ≈ 2#4 (2.54cm^2 )
Anclaje: 12 x 1.27cm^2 = 15.24 ≈ 0.15cm Tramo A-B L1 =
- 55 4 = 0.88m Tramo A-B L2 =
- 55 2 = 1.77m Tramo B-C L1 =
- 60 4 = 0.15m Tramo B-C L2 =
- 60 2 = 0.30m
S-1 =
25 4
= 6.25 ≈ @0.0 5 S-2 =
25 2
D^ E^ F^ H 2.15 3.80 5.
