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UNIVERSIDAD
NACIONAL DE
La RIOJA
CARRERA DE
ARQUITECTURA
ESTRUCTURAS II
CONTINUIDAD
ESTRUCTURAL-
HORMIGON
ARMADO
TRABAJO
PRACTICO Nº 2.-
Continuidad
estructural en Losas
macizas armadas en
una dirección
marzo 2014
ING LUIS NOGUERA
EJEMPLO
• Losas armadas en una dirección
continuas
2
12
43
14
14
5
Tab2
Vacio
ascensor
Tab4
1
Tab1
V1b
Vacio
14
14
14
14
14
14
14 14
1414
1110
9876
1
V1a V1dV1c
12
10
Tab3
52 43
87 96
11
14
13 15
P1x
ELESQUEMAESTRUCTURALPROPUESTO
L2
L1
L4
L3
L3
Lv
L1=3.30m
L2=3.00m
Lv=1.35m
L3=3.00m
BALCON BALCON BALCON BALCON
SIMÉTRICO
2.20
Viga
2P
PB
1P
4P
3P
5P
PORTICOP1x
Detalles constructivos
VIGA V1
VIGA V1
BARANDA
150 KG/M
BA
RA
N
DA
150
K
g/m
Interior:
piso más contrapiso; 8 cm
losa HºAº: 14 cm
cielorraso: 2 cm
total: 24cm
piso más contrapiso; 3 cm
losa HºAº: 14 cm
cielorraso: 2 cm
total: 19cm
24cm
19cm
Aprox1.20m
2.40m
2.05m
Las losas macizas continuas o no son vigas de ancho b=1.00m
EJEMPLO DE APLICACIÓN: LAS LOSAS DE HORMIGÓN ARMADO
SE CONSIDERAN ARMADAS EN UNA DIRECCION Y CONTINUAS
Predimensionado de las losas se efectuan con la anterior TABLA 9.5
unolosa −
m
L
h 1375.0
24
30.3
24
1
1 ===
m
Lv
h 135.0
10
35.1
10
1 ===
voladizolosa −
palierlosa −
m
L
h 107.0
28
00.3
28
1
3 ===
cmm
espesorlosaslastodasparaadoptase
1414.0 =
−−−−−−
ANALISIS (según detalle constructivo) Y COMBINACION DE LAS CARGAS
Estar-dormitorio: Muerta (D)
de piso más contrapiso : 0.08mx2000kg/m3= 160 Kg/m2
de peso propio: 0.14mx2400kg/m3= 336 Kg/m2
de cielorraso: 0.02mx2000kg/m3= 40 Kg/m2
TOTAL: 536 Kg/m2
Balcón: Muerta (D)
de piso más contrapiso : 0.03mx2000kg/m3= 60 Kg/m2
de peso propio: 0.14mx2400kg/m3= 336 Kg/m2
de cielorraso: 0.02mx2000kg/m3= 40 Kg/m2
TOTAL: 436 Kg/m2
Sobrecargas y combinaciones
Viva (Lr) balcón 500 Kg/m2
Viva (Lr) dormitorio,estar 300 Kg/m2
Viva (Lr) circulación, palier 500 Kg/m2
Combinacion balcón: q = 1.4x436 = 610.40 Kg/m2
q = 1.2x436 + 1.6x500=1323.20 Kg/m2
Combinacion dormitorio, estar:
q = 1.4x536= 750.40 Kg/m2
q = 1.2x536 + 1.6x300=1123.20Kg/m2=1.12Tn/m2
Tabla del aci 1
Tabla del aci 2
wL/2=1.12X3.30/2=1.85Tn
1.15wL/2=1.15x1.12X3.30/2=2.12Tn
wL/2=1.12X3.00/2=1.7Tn
wL/2=1.12X3.00/2=1.7Tn
L1=3.30m L2=3.00m
qu=wu=1.12 Tn/m qu=w=1.12 Tn/m
promedio de momentos en apoyo:=(1.22+0.91)/2=1.06Tm
Tm22.1
10
30.3
12.1
2
=
apoyo articulado
Tm10.1
11
30.3
12.1
2
=
Tm63.0
16
00.3
12.1
2
=
Tm91.0
11
00.3
12.1
2
=
1.85Tn
2.12Tn
2.12Tn
1.7Tn
1.7Tn 1.85Tn1.7Tn
1.7Tn
DIAGRAMA DE CORTE;
DIAGRAMA DE MOMENTOS;
HIPÓTESIS DE APOYO: cinco apoyos articulados
1.06Tm 1.06Tm
1.10Tm 1.10Tm0.63Tm 0.63Tm

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Estii unlar-continuidad 2014-2