Diseño de Escalera

 

DISEÑO DE ESCALERA - UN TRAMO + DESCANSO DATOS

DISTRIBUCION DE ACER 7Ф

f'c f'c = 21 210. 0.00 00 K Kg/ g/cm cm²² fy = 420 4200.0 0.00 0 Kg/cm Kg/cm²² S/ S/C C = 60 600. 0.00 00 Kg Kg/m /m²² Acab Acabad ados os = 10 100. 0.00 00 Kg/ Kg/m² m² b= 1.20 m CP = 0.18 m P= 0.30 m 30.96 ° q= t= 0.20 m

6Ф Ф

Recub = 2.00 cm g C° = 2400.00 Kg/m3 hm = 0.31 m 0 .2 5 m

2.00 m

2.40 m

hm

0.25 m

=

h

CP 

2

t  =

cos q  

CP 

1. PREDIMENSIONADO Espesor de la escalera t = Ln/20 t = Ln/25 USAR t

= = =

0.22 m 0.18 m 0.20 m

Jose Luis Reque Quesquen Estudiante de Ingenieria Civil - UNPRG Lambayeque Lambayeq ue - Peru

2. METRADO DE CARGAS Wu2 Wu1

2.125 m

2.525 m X

RB

Wu1 TRAMO DESCANSO Carga Muerta P.P = 576.00 Kg/m Acab Acabad ados os = 12 120. 0.00 00 Kg/m Kg/m 696.00 Kg/m WD1 = 835.20 Kg/m

Carga Viva S/C = 720.00 Kg/m 720.00 Kg/m WL1 = 1152.00 Kg/m

Wu Wu11 = 1987 1987.2 .200 Kg Kg/m /m

2

1/2 3/8 3/8

@ 19.5 @ 22.5 @ 39.5

 

Wu2 TRAMO PASOS Carga Muerta P.P = 899.55 Kg/m Ac Acab abad ados os = 120. 120.00 00 Kg/ g/m m 1019.55 Kg/m WD1 = 1223.47 Kg/m

Carga Viva S/C = 720.00 Kg/m 720.00 Kg/m WL1 = 1152.00 Kg/m

Wu Wu22 = 237 2375. 5.47 47 Kg/m Kg/m

3. CALCULO DE MOMENTO 5334.44 Kg RB = El momento maximo maximo se dará en la seccion que posea el cortante igual a 0 X= 2.25 m Vx = 0 (+) (+) Mu Mu max max = (+) M diseño =

598 5989. 9.60 60 KgKg-m m 4791.68 Kg-m

=

4.79 T-m

4. DISEÑO EN ACERO Para Momento Positivo:

4.79 T-m Asumiendo varilla de acero: b= 120.00 cm d= 17.37 cm a= 1.50 cm Ok! As (+) = 7.63 cm² As (+) = 7.63 cm² S= 19.50 cm # Varillas = 7 As min = 3.75 cm²

Para Momento Negativo: Asumiendo varilla de acero: As (-) = 2.54 cm² Colocar As min As (-) = 3.75 cm² S= 22.50 cm S max = S max = S= # Varillas =

60.00 cm 45.00 cm 22.50 cm 6

Ф= As =

1/2 1.27 cm² USAR =

Ф= As =

7Ф

1/2 @ 19.5

6Ф

3/8 @ 22.5

3/8 0.71 cm² USAR =

 

Para As de Temperatura: As temp = 3.60 cm² As temp = 1.80 cm² Dos capas Asumiendo varilla de acero: S= 39.50 cm S max = 100.00 cm S max = 45.00 cm S= 39.50 cm

Ф= As =

3/8 0.71 cm² USAR =

Ф

3/8 @ 39.5