DISEÑO DE LA LOSA PLANA ALIGERADA CON REFUERZO

1.1 DISEÑO DE LA LOSA PLANA ALIGERADA CON REFUERZO

EN DOS DIRECCIONES

CALCULO DE PERALTE DE LA LOSA

Ln/30= 12.55/30= 0.41≈45cm

Ln=in [0.8+fx ] (1.10)

___14000 ____= 0.42≈45cm

36

EVALUACIÓN DE CARGAS: RECUADRO (A-B, 3-4)

Vol. Losa solida: 12.55x12.25x.45= 69.18m2

Vol. De aligerante: [(16x15)-4 ](0.60x0.60x0.10)= 236x0.144= 33.98m3

Vol.neto de concreto: 69.18-33.98= 35.20m3

Peso de aligerante:0

P.P. de losa: 35.20x2400 = 549.50kg/m2

12.55x12.25

C.M. azotea Carga ultima de diseño

Impermeabilizante y empastado 130kg/m2 U=1.2C.M+1.6C.V

Peso propio de losa 549.50 kg/m2 =1.2(729.5)+1.6(100)

Plafón e instalaciones __50kg/m2_____ =1035.4 kg/m2

729.50kg/m2

CLASIFICACIÓN DE NERVADURAS

U=1035kg/m2

FRANJA DE COLUMNA

N-1 eje A WA= 1035x6.275xx0.7 = 2273.11

2

N-2 eje B WB= 1035x11.7x0.7= 2825.55

3

N-3 eje C WC= 1035x11.035x0.7= 2664.95

3

N-4 eje D WD= 1035x11.31x0.7= 2731.36

3

N-5 eje E WE= 1035x5.7x0.7+1035x2.75x1= 2325.3

3 3

N-6 eje 1 W1= 1035x5.475x0.7+1035x3.25x1= 2443

3 3

N-7 eje 2 W2= 1035x11.35x0.7= 2741.02

3

N-8 eje 3 W3= 1035x12x0.7= 2898

3

N-9 eje 4 W4= 1035x6.12x0.7= 2218.78

2

FRANJA CENTRAL

N -10 WA-B= 1035x12.55x3= 299.75

13

N-11 WB-C= 1035x10.85x3= 306.26

11

N-12 WC-D= 1035x11.20x3= 316.14

11

N-13 WD-E= 1035x11.40x3= 321.79

11

N-14 W1-2= 1035x10.95x3= 309.08

11

N-15 W2-3= 1035x11.75x3= 304

12

N-16 W3-4= 1035x12.25x3= 316

12

NERVADURA 1

W=2273kg/ml . MOMENTOS

M1= (2273)(12.55)2 = 21318kg

16

M2= (2273)(12.55)2 = 24362kg

14

M3= (2273)( 12)2 = 32731

10

M4= (2273)(11.75)2 = 19613

16

M5= (2273)(11.35)2 = 26620 kg

11 . M6= (2273)(10.95)2 = 19467kg

14

M7= (2273)(3.25)2 = 1500kg

16

M8= (2273)(3.25)2 = 12005 kg

2

Mmax

Kg7m Bf D As #Vrs As real

-21318 60 42 14.27 5#6 14.35

+24363 60 42 16.31 1#5 5#6 16.34

-32731 60 42 21391 2#5 4#6 22.62

-19613 60 42 13.13 1#5 4#6 13.47

-26619.41 60 42 18.63 4#5 4#6 19.44

+19467 60 42 13.03 1#5 4#6 13.47

-12004.28 60 42 8.40 3#6 8.61

NERVADURA 2

W=2825kg/ml MOMENTOS

M1= (2825)(12.25)2 = 26434

16

M2= (2825)(12.25)2 = 30210

14

M3= (2825)( 12)2 = 4586

10

M4= (2825)(11.75)2 = 24320

16

M5= (2825)(11.35)2 = 33084

11 . M6= (2825)(10.95)2 = 24139

14

M7= (2825)(3.25)2 = 14920 2

Mmax

Kg7m Bf D As #Vrs As real

-26434 60 42 17.70 #8 4#6 18.08

+30210 60 42 20.23 2#6 4#6 21.62

-40586 60 42 27.18 1#6 5#8 28.26

+24320 60 42 16.28 1#5 5#6 16.34

-33084 60 42 23.15 4#8 1#6 23.15

+24139 60 42 16.16 3#5 4#6 17.45

-14920 60 42 10.44 1#8 2#6 10.81

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