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8/19/2019 2. Viga_Ciment_VC-2
http://slidepdf.com/reader/full/2-vigacimentvc-2 1/5
CÁLCULO Y DISEÑO DE VIGA DE CIMENTACIÓN TIPO : VC-2
DISEÑO POR FLEXIÓN
ESPECIFICACIONES :
f´c 210:= Kg
cm2
fy 4200:= Kg
cm2
φ 0.90:= Flexión( )
DATOS DE APOYOS Y TRAMOS CONTINUOS:Datos obtenidos de la Enolente!! de "iga de #imentacion ( E$%&' ".9 )
a*oyos +:= t,amos -:=
/a*oyo1
.-−:= $n m− /t,amo1
1.:= $n m− i 1 a*oyos..:=
/a*oyo2
0.−:= $n m− /t,amo2
0.:= $n m− 3 1 t,amo..:=
/a*oyo 1.-+−:= $n m− /t,amo 0.+1:= $n m−
/a*oyo4
0.4−:= $n m− /t,amo4
0.+:= $n m−
/a*oyo-
2.0−:= $n m− /t,amo-
1.0:= $n −
/a*oyo+
1.-−:= $n m−
CONDICIONAMIENTO DE LA SECCION :
b 2-.00:= cm +0.00:= cm dc +.22:= c
d´ +.22:= cm d dc−:= d -.= c
β1
if f´c 20≤ 0.-, if f́ c -+0> 0.+-, 1.0-f´c
1400−,
,
:=
β1
0.-=
ρb
0.- f´c⋅ β1
⋅
fy
+000
fy +000+( )⋅:= ρb 0.0212=
8/19/2019 2. Viga_Ciment_VC-2
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ρm5x 0.- ρb⋅:= ρm5x 0.01-9= ρm6n14
fy:= ρm6n 0.00=
Km5x ρm5x fy⋅ 1 0 .-9ρm5x fy⋅
f´c
⋅−
⋅:= Km6n ρm6n fy⋅ 1 0 .-9ρm6n fy⋅
f´c
⋅−
⋅:=
Km5x -4.-= Km6n 1.4-=
7,ρm5xKm5x b⋅ d
2⋅
10-
:= 7,ρm6nKm6n b⋅ d
2⋅
10-
:=
7,ρm5x 9.0= $n m− 7,ρm6n 9.2= $n −
MOMENTOS ULTIMOS EN APOYOS Y TRAMOS :
7/a*oyo i if
/a*oyoi
φ 7,ρm5x>
/a*oyoi
φ, if
/a*oyoi
φ 7,ρm6n< 7,ρm6n,
/a*oyoi
φ,
,
:=
7´/a*oyoi
if
/a*oyoi
φ 7,ρm5x>
/a*oyoi
φ 7,ρm5x−, 0,
:=
7/t,amo 3
if
/t,amo 3
φ 7,ρm5x>
/t,amo 3
φ, if
/t,amo 3
φ 7,ρm6n< 7,ρm6n,
/t,amo 3
φ,
,
:=
7´/t,amo 3
if
/t,amo 3
φ 7,ρm5x>
/t,amo 3
φ 7,ρm5x−, 0,
:=
CÁLCULO DEL ÁREA DE ACERO :
Caso 1: Mu Mu!"#$
%sm6n ρm6n b⋅ d⋅:= %sm6n 4.4= cm
Caso 2: Mu!"#$ Mu Mu!"%&
%s/a*oyoi
0.- f´c⋅
fy
1 1
7/a*oyoi
10-
⋅
0.42- f´c⋅ b⋅ d2⋅
−−
⋅ b⋅ d⋅:=
%s/t,amo 3
0.- f´c⋅
fy1 1
7/t,amo 3
10-
⋅
0.42- f´c⋅ b⋅ d2⋅
−−
⋅ b⋅ d⋅:=
Caso ' : Mu ( Mu!"%&
%sm5x ρm5x b⋅ d⋅:= %sm5x 21.4= cm
fs +000 1d´
d1
fy
+000+
⋅−
⋅:= fs if fs fy> fy, fs,( ):=
8/19/2019 2. Viga_Ciment_VC-2
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%s1/a*oyoi
if
/a*oyoi
φ 7,ρm5x> %sm5x, 0,
:=
%s2/a*oyoi
7´/a*oyoi
10-
⋅
fy d d´−( )⋅:= %s´/a*oyo
i
7´/a*oyoi
10-
⋅
fs d d´−( )⋅:=
%s1/t,amo 3
if
/t,amo 3
φ 7,ρm5x> %sm5x, 0,
:=
%s2/t,amo 3
7´/t,amo 3
10-
⋅
fy d d´−( )⋅:= %s´/t,amo
3
7´/t,amo 3
10-
⋅
fs d d´−( )⋅:=
AREA DE ACERO EN APOYOS Y TRAMOS :
%s/a*oyoi
if
/a*oyoi
φ 7,ρm5x> %s1/a*oyo
i %s2/a*oyo
i+, if
/a*oyoi
φ 7,ρm6n< %sm6n, %s/a*oyo
i,
,
:=
%s´/a*oyoi
if
/a*oyoi
φ 7,ρm5x> %sm6n, %s´/a*oyo
i,
:=
%s/t,amo 3
if
/t,amo 3
φ 7,ρm5x> %s1/t,amo
3 %s2/t,amo
3+, if
/t,amo 3
φ 7,ρm6n< %sm6n, %s/t,amo
3,
,
:=
%s´/t,amo 3
if
/t,amo 3
φ 7,ρm5x> %sm6n, %s´/t,amo
3,
:=
RESUMEN DEL CÁLCULO :
ACERO PRINCIPAL
APOYOS ) * + : M,os ) T$-" + As ) ."2 +
i
1
2
3
4
5
6
= /a*oyoi
-3.53
-0.87
-1.56
-0.84
-2.80
-1.53
= 7/a*oyoi
9.72
9.72
9.72
9.72
9.72
9.72
7´/a*oyoi
0.00
0.00
0.00
0.00
0.00
0.00
%s1/a*oyoi
0.00
0.00
0.00
0.00
0.00
0.00
%s2/a*oyoi
0.00
0.00
0.00
0.00
0.00
0.00
%s/a*oyoi
4.48
4.48
4.48
4.48
4.48
4.48
= %s´/a*o
0.0
0.0
0.0
0.0
0.0
0.0
8/19/2019 2. Viga_Ciment_VC-2
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TRAMOS ) / + : M,os ) T$-" + As ) ."2 +
3
1
2
3
4
5
= /t,amo
31.33
0.88
0.61
0.62
1.02
= 7/t,amo
39.72
9.72
9.72
9.72
9.72
= 7´/t,amo
30.00
0.00
0.00
0.00
0.00
%s1/t,amo
30.00
0.00
0.00
0.00
0.00
%s2/t,amo
30.00
0.00
0.00
0.00
0.00
%s/t,amo
34.48
4.48
4.48
4.48
4.48
= %s´/t,a
0.0
0.0
0.0
0.0
0.0
ACERO CONTINUO
As .o$,*$uo ) - + :
%s/contin7o max %sm6nmax %s/a*oyo( )
4, :=
%s/contin7o 4.4= cm 8sa, 1:2;
As .o$,*$uo ) 0 + :
%s/contin7o max %sm6n
max %s/t,amo( )
,
1
4
0.- f´c⋅
fy 1 1
max 7/a*oyo( )
10
-⋅
0.42- f´c⋅ b⋅ d2
⋅−−
⋅ b⋅ d⋅
⋅,
:=
%s/contin7o 4.4= cm 8sa, 1:2;
As P!*$.*a 3$ 4a!!as :
'e 7sa,5 ace,o < 1:2; *o, me3o, dis*osición de 5,eas
%s/a*oyoi
4.48
4.484.48
4.48
4.48
4.48
= %s/t,amo 3
4.48
4.484.48
4.48
4.48
=i
1.00
2.003.00
4.00
5.00
6.00
= 3
1.00
2.003.00
4.00
5.00
=8sa, 4 1:2;
8sa, 4 1:2;
8sa, 4 1:2;8sa, 4 1:2;
8sa, 4 1:2;8sa, 4 1:2;
8sa, 4 1:2;8sa, 4 1:2;
8sa, 4 1:2;
8/19/2019 2. Viga_Ciment_VC-2
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Es,!*53!*a : "c0.- f´c× b⋅ d⋅
1000:= "c 10.= $n El alo, "c es ayo, a los #o,tantes 5ximos #alc7la
E$%&'. " = 2.-+ $n
ESPACIAMIENTO DE ESTRI4OS :
8sa, Est,ibos :; > 0.0-? > 0.10? > 0.1-? @ > 0.20 %:A ('egBn @eC7e,imientos 6nimos)