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DISEÑO DE ESCALERA DE UN TRAMODatos

F'c 210 kg/cm2 Longitud Esc. 3.5 mF y 4200 kg/cm3 Paso 0.25 m

NPT 2.4 m Nº CP 15Ancho Losa 0.2 mPiso termin 100 kg/m2

S/C 200 kg/m3

1) Calculo del contrapaso

CP = 17.33 cmCP = 0.173 cm

2) Cálculo de "t"

t = ln/25 = 14 cmt = ln/30 = 11.67 cm t = 12 cmt = 3,5 ln = 12.25 cm t = 0.12 m

3) Metrado

25Tg α = 0.692

17.30 α = 34.68 x = 1/cos α x = 1.22

P losa = 351.36 kg/mP esc. = 207.6 kg/mPpt 100 kg/m

658.96 kg/ml W L = 200 kg/m

W u = 1348.44 kg/ml

4)Momentos

(+) M = 1651.84 kg-m 0.0833(-) M = 1376.53 kg-m

5)Momento último resistente

Mur = 4294.51 kg/m Φ = 0.9w = 0.319

W D =

M(+) Simplemente Reforzada b = 100M(-) Simplemente Reforzada d = 9.37

6) Cálculo de Acero

Para Momento Positivo Para Momento Negativo

w = 0.1062 w = 0.0875

ρ = 0.0053 ρ = 0.0044

As = 4.97 As = 4.12

Acero por temperatura As min = 1.69

7) Espaciamiento

Diametro de varila As (+)AS(+) S = 25.57 Diametro de varila As(-)As(-) S = 30.80 Diametro de varila As min

As min S = 56.21

DISEÑO DE ESCALERA DE UN TRAMO

3.5

0.0833

0.1000

1.271.270.95

DISEÑO DE ESCALERA DE DOS TRAMOSDatos

F'c 210 kg/cm2 Longitud Esc. 2.75 mF y 4200 kg/cm3 Paso 0.25 m

NPT 2.55 m Nº CP 15Ancho Losa 0 m CP 0.17 mPiso termin 100 kg/m2

S/C 300 kg/m3

TRAMO 11) Cálculo de "t"

t = ln/25 = 11 cmt = ln/30 = 9.17 cm t = 11 cmt = 3,5 ln = 9.625 cm t = 0.11 m

2) Metrado

25Tg α = 0.68

17.00 α = 34.22 x = 1/cos α x = 1.21

a) Tramo con escalones

Wpp = 319.44 kg/mW esc. = 204 kg/mWpt = 100 kg/m

623.44 kg/ml W L = 300 kg/m

W u = 1412.82 kg/ml

b) M. Losa

Wpp = 264 kg/mWpt = 300 kg/m

564 kg/ml W L = 300 kg/m

W u = 1329.60 kg/ml

1412.82 1329.60

R1 R21.75 1

W D =

W D =

R2 = 1874.54 M = 1927.49 X +R1 = 1927.49

Para momento màximo x = 3)Momentos

(+) Mmax = 1314.81 kg-m(-) Mmax = 657.41 kg-m


Mur = 3426.77 kg/m Φ = 0.9w = 0.319




w = 0.1059 w = 0.0512

ρ = 0.0053 ρ = 0.0026

As = 4.44 As = 2.18


6) Espaciamiento

Diametro de varila As (+)AS(+) S = 28.63 Diametro de varila As (-)As(-) S = 32.63 Diametro de varila As min

As min S = 47.02

TRAMO 2

1 ) Metrado

a) Tramo con escalones b) M. Losa

W u = 1412.82 kg/ml W u = 1329.60

2)Momentos

1329.60 1412.82 1329.60

R1 R21.2 2 1.2

R2 = 3008.336 M = 2652.691R1 = 3008.336

Para momento màximo

(+) Mmax = 3359.10 kg-m(-) Mmax = 1679.55 kg-m


Mur = 3426.77 kg/m Φ = 0.9w = 0.319




w = 0.3104 w = 0.1381

ρ = 0.0155 ρ = 0.0069

As = 12.97 As = 5.78


6) Espaciamiento

Diametro de varila As (+)AS(+) S = 9.79 Diametro de varila As (-)

As(-) S = 21.99 Diametro de varila As minAs min S = 47.02

DISEÑO DE ESCALERA DE DOS TRAMOS

1.2 2 1.2

-706.408 X^2

1.36

1.270.710.71

kg/ml

1329.60 1412.82

R11.2 X

1412.816 X -706.408 X^2

x = 1

1.271.27

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