Prediseño Marco

PREDISEÑO LOSA MACIZA Losa maciza apoyada sobre vigas peraltadas.-

Dimensiones viga peraltada: ln b h 4200 kg/cm²(m) (cm) (cm)2 25 353 25 404 25 405 25 456 25 507 30 558 30 60

1. Losa 2x2 m con viga peraltada de 25x35 cm.

Inercia de la viga peraltada interior:b= 22.0 cm *Donde el valor de "C" se obtuvo por la ecuación:

25.0 cm

13.0 cm

22.0 cm *Donde el valor de "I" se obtuvo por la ecuación:B= 69.0 cm 6.7 cm

H= 35.0 cm 10.8 cm

28.5 cm

11.0 cm I= 139231.04 cm4C= 21.8 cm

Inercia de la viga peraltada exterior:b= 22.0 cm *Donde el valor de "Ȳ" se obtuvo por la ecuación:

25.0 cm

22.0 cm

13.0 cm

B= 47.0 cm 2.71 cm

H= 35.0 cm 8.29 cm

17.5 cm

28.5 cm I= 119431.93 cm4875.0

286.0Ȳ= 20.21 cm

- Losa central:

Dimensionesβ

h hx y (α > 2.0) (α < 2.0)

bw=h1=h2=

X1=X2=

C1=C2=

bw=h1=h2= *Donde el valor de "I" se obtuvo por la ecuación:

Y1=Y2=

Ȳ1=Ȳ2=A1= cm²

A2= cm²

Para: 0.2 < α < 2.0 ; h > 12.5 cm Para: α > 2.0 ; h > 9 cm

𝑙_𝑛

𝑓_𝑦=

𝑦 ̅=(∑▒ ̅〖𝑦 _𝑖 𝐴_𝑖 〗 )/(∑▒𝐴_𝑖 )𝐼=∑▒𝐼 ̅_𝑥 +𝐴 〖𝑑 _𝑦〗^2

𝛼_𝑓𝑚𝐼_𝑣𝑖𝑔𝑎 𝐼_𝑙𝑜𝑠𝑎

𝑦 ̅=(∑▒ ̅〖𝑦 _𝑖 𝐴_𝑖 〗 )/(∑▒𝐴_𝑖 )𝐼=∑▒𝐼 ̅_𝑥 +𝐴 〖𝑑 ^2〗 _𝑦

(cm) (cm)

β

(m) (cm4) (cm4) (cm) (cm)200 x 200 1 200 139231.0 36616.7 3.802 4.89 4.07

- Losa de borde:

Dimensionesβ

h hx y (α > 2.0) (α < 2.0)

(cm) (cm) (m) (cm4) (cm4) (cm) (cm)200 x 200 1 200 119431.9 20596.9 5.799 4.301 4.89 3.89

139231.0 36616.7 3.802139231.0 36616.7 3.802139231.0 36616.7 3.802

- Losa de esquina:

Dimensionesβ

h hx y (α > 2.0) (α < 2.0)

(cm) (cm) (m) (cm4) (cm4) (cm) (cm)200 x 200 1 200 119431.9 20596.9 5.799 4.8 4.89 3.73

119431.9 20596.9 5.799139231.0 36616.7 3.802139231.0 36616.7 3.802



25.0 cm

13.0 cm


H= 40.0 cm 12.1 cm

33.5 cm

13.5 cm I= 218389.93 cm4C= 25.6 cm


25.0 cm

27.0 cm

13.0 cm

B= 52.0 cm 3.51 cm

H= 40.0 cm 9.99 cm

20.0 cm

33.5 cm I= 185626.51 cm41000.0

351.0Ȳ= 23.51 cm

bw=h1=h2=

X1=X2=

C1=C2=


Y1=Y2=

Ȳ1=Ȳ2=A1= cm²

A2= cm²

𝑙_𝑛 𝐼_𝑣𝑖𝑔𝑎 𝐼_𝑙𝑜𝑠𝑎 𝛼 𝛼_𝑓𝑚


𝑦 ̅=(∑▒ ̅〖𝑦 _𝑖 𝐴_𝑖 〗 )/(∑▒𝐴_𝑖 )𝐼=∑▒𝐼 ̅_𝑥 +𝐴 〖𝑑 _𝑦〗^2

𝑦 ̅=(∑▒ ̅〖𝑦 _𝑖 𝐴_𝑖 〗 )/(∑▒𝐴_𝑖 )𝐼=∑▒𝐼 ̅_𝑥 +𝐴 〖𝑑 ^2〗 _𝑦

- Losa central:

Dimensionesβ

h hx y (α > 2.0) (α < 2.0)

(cm) (cm) (m) (cm4) (cm4) (cm) (cm)300 x 300 1 300 218389.9 54925.0 3.976 7.33 6.01

- Losa de borde:

Dimensionesβ

h hx y (α > 2.0) (α < 2.0)

(cm) (cm) (m) (cm4) (cm4) (cm) (cm)300 x 300 1 300 185626.5 29751.0 6.239 4.542 7.33 5.72

218389.9 54925.0 3.976218389.9 54925.0 3.976218389.9 54925.0 3.976

- Losa de esquina:

Dimensionesβ

h hx y (α > 2.0) (α < 2.0)

(cm) (cm) (m) (cm4) (cm4) (cm) (cm)300 x 300 1 300 185626.5 29751.0 6.239 5.108 7.33 5.45

185626.5 29751.0 6.239218389.9 54925.0 3.976218389.9 54925.0 3.976



25.0 cm

13.0 cm


H= 40.0 cm 12.1 cm

33.5 cm

13.5 cm I= 218389.93 cm4C= 25.6 cm


25.0 cm

27.0 cm

bw=h1=h2=

X1=X2=

C1=C2=

bw=h1=

𝑙_𝑛 𝛼_𝑓𝑚𝐼_𝑣𝑖𝑔𝑎 𝐼_𝑙𝑜𝑠𝑎



𝑦 ̅=(∑▒ ̅〖𝑦 _𝑖 𝐴_𝑖 〗 )/(∑▒𝐴_𝑖 )𝐼=∑▒𝐼 ̅_𝑥 +𝐴 〖𝑑 _𝑦〗^2

𝑦 ̅=(∑▒ ̅〖𝑦 _𝑖 𝐴_𝑖 〗 )/(∑▒𝐴_𝑖 )

13.0 cm

B= 52.0 cm 3.51 cm

H= 40.0 cm 9.99 cm

20.0 cm

33.5 cm I= 185626.51 cm41000.0

351.0Ȳ= 23.51 cm

- Losa central:

Dimensionesβ

h hx y (α > 2.0) (α < 2.0)

(cm) (cm) (m) (cm4) (cm4) (cm) (cm)400 x 400 1 400 218389.9 73233.3 2.982 9.78 8.82

- Losa de borde:

Dimensionesβ

h hx y (α > 2.0) (α < 2.0)

(cm) (cm) (m) (cm4) (cm4) (cm) (cm)400 x 400 1 400 185626.5 38905.2 4.771 3.429 9.78 8.44

218389.9 73233.3 2.982218389.9 73233.3 2.982218389.9 73233.3 2.982

- Losa de esquina:

Dimensionesβ

h hx y (α > 2.0) (α < 2.0)

(cm) (cm) (m) (cm4) (cm4) (cm) (cm)400 x 400 1 400 185626.5 38905.2 4.771 3.877 9.78 8.09

185626.5 38905.2 4.771218389.9 73233.3 2.982218389.9 73233.3 2.982



25.0 cm

13.0 cm


H= 45.0 cm 13.3 cm

h2= *Donde el valor de "I" se obtuvo por la ecuación:Y1=Y2=

Ȳ1=Ȳ2=A1= cm²

A2= cm²

bw=h1=h2=

X1=X2=




𝐼=∑▒𝐼 ̅_𝑥 +𝐴 〖𝑑 ^2〗 _𝑦

𝑦 ̅=(∑▒ ̅〖𝑦 _𝑖 𝐴_𝑖 〗 )/(∑▒𝐴_𝑖 )𝐼=∑▒𝐼 ̅_𝑥 +𝐴 〖𝑑 _𝑦〗^2

38.5 cm

16.0 cm I= 324001.55 cm4C= 29.3 cm


25.0 cm

32.0 cm

13.0 cm

B= 57.0 cm 4.32 cm

H= 45.0 cm 11.68 cm

22.5 cm

38.5 cm I= 273449.33 cm41125.0

416.0Ȳ= 26.82 cm

- Losa central:

Dimensionesβ

h hx y (α > 2.0) (α < 2.0)

(cm) (cm) (m) (cm4) (cm4) (cm) (cm)500 x 500 1 500 324001.6 91541.7 3.539 12.22 10.44

- Losa de borde:

Dimensionesβ

h hx y (α > 2.0) (α < 2.0)

(cm) (cm) (m) (cm4) (cm4) (cm) (cm)500 x 500 1 500 273449.3 48059.4 5.69 4.077 12.22 9.93

324001.6 91541.7 3.539324001.6 91541.7 3.539324001.6 91541.7 3.539

- Losa de esquina:

Dimensionesβ

h hx y (α > 2.0) (α < 2.0)

(cm) (cm) (m) (cm4) (cm4) (cm) (cm)500 x 500 1 500 273449.3 48059.4 5.69 4.615 12.22 9.47

273449.3 48059.4 5.69324001.6 91541.7 3.539324001.6 91541.7 3.539


C1=C2=


Y1=Y2=

Ȳ1=Ȳ2=A1= cm²

A2= cm²




𝑦 ̅=(∑▒ ̅〖𝑦 _𝑖 𝐴_𝑖 〗 )/(∑▒𝐴_𝑖 )𝐼=∑▒𝐼 ̅_𝑥 +𝐴 〖𝑑 ^2〗 _𝑦


25.0 cm

13.0 cm


H= 50.0 cm 14.5 cm

43.5 cm

18.5 cm I= 460020.72 cm4C= 33.0 cm


25.0 cm

37.0 cm

13.0 cm

B= 62.0 cm 5.14 cm

H= 50.0 cm 13.36 cm

25.0 cm

43.5 cm I= 386068.75 cm41250.0

481.0Ȳ= 30.14 cm

- Losa central:

Dimensionesβ

h hx y (α > 2.0) (α < 2.0)

(cm) (cm) (m) (cm4) (cm4) (cm) (cm)600 x 600 1 600 460020.7 109850.0 4.188 14.67 11.80

- Losa de borde:

Dimensionesβ

h hx y (α > 2.0) (α < 2.0)

(cm) (cm) (m) (cm4) (cm4) (cm) (cm)600 x 600 1 600 386068.7 57213.5 6.748 4.828 14.67 11.16

460020.7 109850.0 4.188460020.7 109850.0 4.188460020.7 109850.0 4.188

- Losa de esquina:

Dimensionesβ

h h

bw=h1=h2=

X1=X2=

C1=C2=


Y1=Y2=

Ȳ1=Ȳ2=A1= cm²

A2= cm²

𝑙_𝑛

𝑦 ̅=(∑▒ ̅〖𝑦 _𝑖 𝐴_𝑖 〗 )/(∑▒𝐴_𝑖 )𝐼=∑▒𝐼 ̅_𝑥 +𝐴 〖𝑑 _𝑦〗^2




𝑦 ̅=(∑▒ ̅〖𝑦 _𝑖 𝐴_𝑖 〗 )/(∑▒𝐴_𝑖 )𝐼=∑▒𝐼 ̅_𝑥 +𝐴 〖𝑑 ^2〗 _𝑦

x y β (α > 2.0) (α < 2.0)

(cm) (cm) (m) (cm4) (cm4) (cm) (cm)600 x 600 1 600 386068.7 57213.5 6.748 5.468 14.67 10.59

386068.7 57213.5 6.748460020.7 109850.0 4.188460020.7 109850.0 4.188



30.0 cm

13.0 cm


H= 55.0 cm 14.9 cm

48.5 cm

21.0 cm I= 721102.71 cm4C= 35.9 cm


30.0 cm

42.0 cm

13.0 cm

B= 72.0 cm 5.22 cm

H= 55.0 cm 15.78 cm

27.5 cm

48.5 cm I= 604545.44 cm41650.0

546.0Ȳ= 32.72 cm

- Losa central:

Dimensionesβ

h hx y (α > 2.0) (α < 2.0)

(cm) (cm) (m) (cm4) (cm4) (cm) (cm)700 x 700 1 700 721102.7 128158.3 5.627 17.11 12.20

bw=h1=h2=

X1=X2=

C1=C2=


Y1=Y2=

Ȳ1=Ȳ2=A1= cm²

A2= cm²


𝑙_𝑛

𝑦 ̅=(∑▒ ̅〖𝑦 _𝑖 𝐴_𝑖 〗 )/(∑▒𝐴_𝑖 )𝐼=∑▒𝐼 ̅_𝑥 +𝐴 〖𝑑 _𝑦〗^2


𝑦 ̅=(∑▒ ̅〖𝑦 _𝑖 𝐴_𝑖 〗 )/(∑▒𝐴_𝑖 )𝐼=∑▒𝐼 ̅_𝑥 +𝐴 〖𝑑 ^2〗 _𝑦

- Losa de borde:

Dimensionesβ

h hx y (α > 2.0) (α < 2.0)

(cm) (cm) (m) (cm4) (cm4) (cm) (cm)700 x 700 1 700 604545.4 66825.4 9.047 6.482 17.11 11.42

721102.7 128158.3 5.627721102.7 128158.3 5.627721102.7 128158.3 5.627

- Losa de esquina:

Dimensionesβ

h hx y (α > 2.0) (α < 2.0)

(cm) (cm) (m) (cm4) (cm4) (cm) (cm)700 x 700 1 700 604545.4 66825.4 9.047 7.337 17.11 10.74

604545.4 66825.4 9.047721102.7 128158.3 5.627721102.7 128158.3 5.627



30.0 cm

13.0 cm


H= 60.0 cm 16.0 cm

53.5 cm

23.5 cm I= 959171.81 cm4C= 39.5 cm


30.0 cm

47.0 cm

13.0 cm

B= 77.0 cm 5.96 cm

H= 60.0 cm 17.54 cm

30.0 cm

53.5 cm I= 800518.87 cm41800.0

611.0Ȳ= 35.96 cm

bw=h1=h2=

X1=X2=

C1=C2=


Y1=Y2=

Ȳ1=Ȳ2=A1= cm²

A2= cm²



𝑦 ̅=(∑▒ ̅〖𝑦 _𝑖 𝐴_𝑖 〗 )/(∑▒𝐴_𝑖 )𝐼=∑▒𝐼 ̅_𝑥 +𝐴 〖𝑑 _𝑦〗^2

𝑦 ̅=(∑▒ ̅〖𝑦 _𝑖 𝐴_𝑖 〗 )/(∑▒𝐴_𝑖 )𝐼=∑▒𝐼 ̅_𝑥 +𝐴 〖𝑑 ^2〗 _𝑦

- Losa central:

Dimensionesβ

h hx y (α > 2.0) (α < 2.0)

(cm) (cm) (m) (cm4) (cm4) (cm) (cm)800 x 800 1 800 959171.8 146466.7 6.549 19.56 12.99

- Losa de borde:

Dimensionesβ

h hx y (α > 2.0) (α < 2.0)

(cm) (cm) (m) (cm4) (cm4) (cm) (cm)800 x 800 1 800 800518.9 75979.6 10.54 7.546 19.56 12.10

959171.8 146466.7 6.549959171.8 146466.7 6.549959171.8 146466.7 6.549

- Losa de esquina:

Dimensionesβ

h hx y (α > 2.0) (α < 2.0)

(cm) (cm) (m) (cm4) (cm4) (cm) (cm)800 x 800 1 800 800518.9 75979.6 10.54 8.542 19.56 11.32

800518.9 75979.6 10.54959171.8 146466.7 6.549959171.8 146466.7 6.549

- Resumen

Losa (m)x y

2.00 x 2.00 4.89 13.003.00 x 3.00 7.33 13.004.00 x 4.00 9.78 13.005.00 x 5.00 12.22 15.006.00 x 6.00 14.67 18.007.00 x 7.00 17.11 20.008.00 x 8.00 19.56 22.00

Espesor Calculado (cm)

Espesor Asumido (cm)




b= 3.0 cm *Donde el valor de "C" se obtuvo por la ecuación:2.0 cm

3.0 cm

### cm *Donde el valor de "I" se obtuvo por la ecuación:

b= 25.0 cm *Donde el valor de "Ȳ" se obtuvo por la ecuación:25.0 cm

40.0 cm

10.0 cm

B= 50.0 cm 3.33 cm

H= 50.0 cm 16.67 cm

25.0 cm

45.0 cm I= 345833.33 cm41250.0

250.0Ȳ= 28.33 cm

vigas

2 4.9 10.81 2 35 25

bw=h1=h2=


Y1=

Y2=Ȳ1=Ȳ2=A1= cm²

A2= cm²

𝑦 ̅=(∑▒ ̅〖𝑦 _𝑖 𝐴_𝑖 〗 )/(∑▒𝐴_𝑖 )

𝐼=∑▒𝐼 ̅_𝑥 +𝐴 〖𝑑 _𝑦〗^2

𝑦 ̅=(∑▒ ̅〖𝑦 _𝑖 𝐴_𝑖 〗 )/(∑▒𝐴_𝑖 )𝐼=∑▒𝐼 ̅_𝑥 +𝐴 〖𝑑 ^2〗 _𝑦

3 7.3 16.22 3 40 254 9.8 21.62 4 40 255 12 27.03 5 45 256 15 32.43 6 50 257 17 37.84 7 55 308 20 43.24 8 60 30

PREDISEÑO PLACA PLANA CON ÁBACOSLosa sin vigas.- Predim. del ábaco según ACI-318:

• El ábaco debe proyectarse bajo la losa al menos un cuarto del espesor de la losa.

- Espesor de la placa plana según ACI-318:

Losa (m)x y

2.00 x 2.00 13.00 17.003.00 x 3.00 13.00 17.004.00 x 4.00 15.00 19.005.00 x 5.00 15.00 19.006.00 x 6.00 17.00 22.007.00 x 7.00 20.00 25.00 Losa (m) Ábaco (m)

8.00 x 8.00 23.00 29.00 x y x y2.00 x 2.00 0.70 x 0.70 5.562.20 x 2.20 0.75 x 0.75 6.112.40 x 2.40 0.80 x 0.80 6.67

2.60 x 2.60 0.90 x 0.90 7.222.80 x 2.80 0.95 x 0.95 7.783.00 x 3.00 1.00 x 1.00 8.333.20 x 3.20 1.10 x 1.10 8.893.40 x 3.40 1.15 x 1.15 9.443.60 x 3.60 1.20 x 1.20 10.003.80 x 3.80 1.30 x 1.30 10.564.00 x 4.00 1.35 x 1.35 11.114.20 x 4.20 1.40 x 1.40 11.674.40 x 4.40 1.50 x 1.50 12.224.60 x 4.60 1.55 x 1.55 12.784.80 x 4.80 1.60 x 1.60 13.335.00 x 5.00 1.70 x 1.70 13.895.20 x 5.20 1.75 x 1.75 14.445.40 x 5.40 1.80 x 1.80 15.005.60 x 5.60 1.90 x 1.90 15.565.80 x 5.80 1.95 x 1.95 16.116.00 x 6.00 2.00 x 2.00 16.676.20 x 6.20 2.10 x 2.10 17.226.40 x 6.40 2.15 x 2.15 17.786.60 x 6.60 2.20 x 2.20 18.336.80 x 6.80 2.30 x 2.30 18.897.00 x 7.00 2.35 x 2.35 19.447.20 x 7.20 2.40 x 2.40 20.007.40 x 7.40 2.50 x 2.50 20.567.60 x 7.60 2.55 x 2.55 21.11

• Debe extenderse en cada dirección desde la linea central de apoyo por una distancia no menos a un sexto de la longitud del vano medida al centro de los apoyos en esa dirección.

Espesor placa (cm)

Espesor Ábaco (cm)

Espesor placa (m)

7.80 x 7.80 2.60 x 2.60 21.678.00 x 8.00 2.70 x 2.70 22.22

PREDISEÑO LOSA NERVADA CON ÁBACOSLosa sin vigas.- Espesor de la placa plana según ACI-318:

Losa (m)x y

2.00 x 2.00 13.00 17.003.00 x 3.00 13.00 17.004.00 x 4.00 15.00 19.005.00 x 5.00 15.00 19.006.00 x 6.00 17.00 22.007.00 x 7.00 20.00 25.008.00 x 8.00 23.00 29.00

- Sección equivalente.

1. Heq para losas 2x2, 3x3 m de H=13 cm.

S= 60.0 cm S= 60.00 cm *Donde el valor de "C" se obtuvo por la ecuación:H= 13.0 cm 10.00 cm

5.00 cm

13.70 cm *Donde el valor de "I" se obtuvo por la ecuación:b= 25.00 cm 2.9 cm

16.20 cm 6.4 cm

6.85 cm

I= 10985.00 cm4 C= 13.27 cm I= 10989.91 cm4

18.70 cm → Dimensiones de la sección equivalente:S= 60.0

10.0

Espesor placa (cm)

Espesor Ábaco (cm)

bw=h1=h2=

X1=C1= X2=C2=

Heq=

bw=

𝑦 ̅=(∑▒ ̅〖𝑦 _𝑖 𝐴_𝑖 〗 )/(∑▒𝐴_𝑖 )𝐼=∑▒𝐼 ̅_𝑥 +𝐴 〖𝑑 _𝑦〗^2

5.014.0

H= 19.0

2. Heq para losas 4x4, 5x5 m de H=15 cm.


5.00 cm


19.09 cm 7.0 cm

8.30 cm

I= 16875.00 cm4 C= 15.25 cm I= 16878.62 cm4


10.05.0

17.0H= 22.0

3. Heq para losa 6x6 m de H=17 cm.


5.00 cm


22.01 cm 7.4 cm

9.76 cm

I= 24565.00 cm4 C= 17.18 cm I= 24568.23 cm4


10.05.0

20.0H= 25.0



5.00 cm


26.46 cm 8.1 cm

h1=h2=

bw=h1=h2=

X1=C1= X2=C2=

Heq=

bw=h1=h2=

bw=h1=h2=

X1=C1= X2=C2=

Heq=

bw=h1=h2=

bw=h1=h2=

X1=C1= X2=

𝑦 ̅=(∑▒ ̅〖𝑦 _𝑖 𝐴_𝑖 〗 )/(∑▒𝐴_𝑖 )𝐼=∑▒𝐼 ̅_𝑥 +𝐴 〖𝑑 _𝑦〗^2

𝑦 ̅=(∑▒ ̅〖𝑦 _𝑖 𝐴_𝑖 〗 )/(∑▒𝐴_𝑖 )𝐼=∑▒𝐼 ̅_𝑥 +𝐴 〖𝑑 _𝑦〗^2

𝑦 ̅=(∑▒ ̅〖𝑦 _𝑖 𝐴_𝑖 〗 )/(∑▒𝐴_𝑖 )𝐼=∑▒𝐼 ̅_𝑥 +𝐴 〖𝑑 _𝑦〗^2

11.98 cm

I= 40000.00 cm4 C= 20.03 cm I= 40017.64 cm4


10.05.0

24.0H= 29.0



5.00 cm


30.99 cm 8.6 cm

14.25 cm

I= 60835.00 cm4 C= 22.83 cm I= 60869.07 cm4


10.05.0

28.0H= 33.0

- Resumen

Losa (m) S Hx y (cm) (cm) (cm) (cm) (cm)

2.00 x 2.00 60.00 10.00 5.00 14.00 19.003.00 x 3.00 60.00 10.00 5.00 14.00 19.004.00 x 4.00 60.00 10.00 5.00 17.00 22.005.00 x 5.00 60.00 10.00 5.00 17.00 22.006.00 x 6.00 60.00 10.00 7.00 18.00 25.007.00 x 7.00 60.00 10.00 7.00 22.00 29.008.00 x 8.00 60.00 10.00 8.00 25.00 33.00

C2=

Heq=

bw=h1=h2=

bw=h1=h2=

X1=C1= X2=C2=

Heq=

bw=h1=h2=

bw h1 h2

𝑦 ̅=(∑▒ ̅〖𝑦 _𝑖 𝐴_𝑖 〗 )/(∑▒𝐴_𝑖 )𝐼=∑▒𝐼 ̅_𝑥 +𝐴 〖𝑑 _𝑦〗^2

vigas

2 4.9 10.81 35 253 7.3 16.22 40 254 9.8 21.62 40 255 12 27.03 45 256 15 32.43 50 257 17 37.84 55 308 20 43.24 60 30

Losa (m)x y

2.00 x 2.00 13.00 17.003.00 x 3.00 13.00 17.004.00 x 4.00 15.00 19.005.00 x 5.00 15.00 19.006.00 x 6.00 17.00 22.007.00 x 7.00 20.00 25.008.00 x 8.00 23.00 29.00

Espesor placa (cm)

Espesor Ábaco (cm)

PREDISEÑO LOSA NERVADA POSTENSADALosa sobre vigas peraltadas.- Espesor de la placa plana según Post-Tensioning Institute y ACI-318:

vanos continuos: l/ 35

Losa (m)x y

2.00 x 2.00 5.71 18.003.00 x 3.00 8.57 18.004.00 x 4.00 11.43 19.005.00 x 5.00 14.29 20.006.00 x 6.00 17.14 22.007.00 x 7.00 20.00 25.008.00 x 8.00 22.86 28.00

- Dimensiones de la losa nervada.

Losa (m) S Hx y (cm) (cm) (cm) (cm) (cm)

2.00 x 2.00 60.00 10.00 5.00 13.00 18.003.00 x 3.00 60.00 10.00 5.00 13.00 18.004.00 x 4.00 60.00 10.00 5.00 14.00 19.005.00 x 5.00 60.00 10.00 5.00 15.00 20.006.00 x 6.00 60.00 10.00 7.00 15.00 22.007.00 x 7.00 60.00 10.00 7.00 18.00 25.00

Espesor calculado (cm)

Espesor asumido (cm)

bw h1 h2

8.00 x 8.00 60.00 10.00 8.00 20.00 28.00

Prediseño Marco

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