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8/19/2019 ZAPATAS Excentricas Z-3
http://slidepdf.com/reader/full/zapatas-excentricas-z-3 1/4
DISEÑO DE CIMENTACION EXCENTRICA Z-3
Datos
fc 210 kg
cm2
:= γ m 1.80 tonne
m3
:=
fy 4200 kg
cm2
:= Ko 2 kg
cm3
:=
σt 0.87kg
cm2
:=SCpiso
h f 1.50:= Columna
A 30c:=PD 5.29tonne:=
B 30c:=PL 0.24tonne:=
4.40:=!C"#$o 0.300
tonne
m2
:=
8/19/2019 ZAPATAS Excentricas Z-3
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Calculo del Area de Zapata requerida
σn σt γ m hf ⋅− !C"#$o−:= σn 5.7 103×
kg
m2
=
Calculo de carga de servicio
P PD P+:= P 5.53 103
× kg=
Calculo de Az
A%P
σn:= A% 0.97m
2=
Calculo de las dimensiones de la Zapata
Az=2b.b ..........1
de 1
&A%
2:= & 0.'9'm= Usar & 1.00:=
(A%
&:= ( 0.97 m= Usar ( 1.00:=
h% 2.3 &⋅
3Ko &⋅ cm⋅
15000 fc kg⋅⋅
⋅:= h% 0.224m=
h% h%
0.'0m h% 0.'0m<#f
:=h% 0.'0≥
h% 0.' m=
h % 0.'0
:=Lc h%⋅−:= Lc 3.8⋅=
Diseño por Fleion
En Direccion de la Excentricidad
) h% m⋅ 7.5cm− 1.5 1.58⋅ c−:=
) 0.501m=
Pu 1.4 PD⋅ 1.7 PL⋅+:= Pu 7.814 103× kg=
Wnu=Pu/b*nu
Pu
&:= * nu 7.814 10
3× kg
m=
+uma, *nu & B−-
2
2⋅:= +uma, 1.914 10
3× m kg⋅=
Calculo del Acero
φ 0.9
:=a 0.013:=
A$
+uma,
φ fy⋅ ) a
2− ⋅
:=
A$ 1.024 10 4−× m
2=
8/19/2019 ZAPATAS Excentricas Z-3
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aA$ fy⋅
0.85fc 1⋅ m:= a 2.408 10
3−× m=
A$m#n 0.0018 &⋅ )⋅:= A$m#n 9.023 10 4−
× m2=
A$ A$ 104⋅
A$m#n 104
⋅ A $ A $m#n<#f
:=
A$ 9.023m2= cm2
/3 0.71cm2
:= /5 1.98cm2
:= /8 5.07cm2
:=
φ3 0.95c:= φ5 1.58c:= φ8 2.54c:=
/4 1.27cm2
:= /' 2.85cm2
:=
φ4 1.27c:= φ' 1.90c:=
Para acero
/5 usar oun) A$ cm
2⋅
/50,
=
A$ cm2
⋅
/5@
( 15cm− φ5−
8 1− 0.12m=
En Direccion Transversal a la Excentricidad
*nu Pu
(:=
* nu 7.814 103
× kg
m=
+uma, *nu
( A−
2
2
2⋅:=
+uma, 478.'07 m kg⋅=Wnu=Pu/T
Calculo del Aceroφ 0.9:=
8/19/2019 ZAPATAS Excentricas Z-3
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a 0.008:= A$ +uma,
φ fy⋅ ) a
2− ⋅
:=
A$ 2.54' 10 5−
× m2
=
a
A$ fy⋅
0.85fc 1⋅ m:= a 0.001m=
A$m#n 0.0018 (⋅ )⋅:= A$m#n 9.023 10 4−
× m2=
A$ A$ 104
⋅
A$m#n 104
⋅ A$ A$m#n<#f
:=
A$ 9.023m2= cm2
/3 0.71cm2
:= /5 1.98cm2
:= /8 5.07cm2
:=
φ3 0.95c:= φ5 1.58c:= φ8 2.54c:=
/4 1.27cm2
:= /' 2.85cm2
:=
φ4 1.27c:= φ' 1.90c:=
Para acero
/5 usar oun)A$ cm
2⋅
/50,
=
A$ cm2⋅
/5@
& 15cm− φ5−
8 1− 0.12m=