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Sector 2: Ancho
ap2 := 0.08 m
Pp2 :=
hp ⋅ ap2 ⋅ ep⋅ γH°A° 2
Qp2 Qp2 :=
Pp2 Sp
Pp2 Pp2 = 17.28
Kgr
Qp2 = 8.686 Kgr/m
Sector 3: Ancho
ap3 := 0.10 m
P p3 := ha ⋅ ap3⋅ ep⋅ γH°A° Qp3 Qp3 :=
Pp3 Sp
P p3 = 7.2
Qp3 = 3.619
Puntos de evaluacion de momentos
A : Cálculo de postes B : Cálculo de acera C : Cálculo bordillo
A
B C
Kgr/m
Kgr
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CALCULO BARANDADO Sección
hb ab Carga Última de Diseño
Miembro Superior: Vertical CM := Qba
CM = 45
Kgr/m
CV := F 1v
CV = 150
Kgr/m
Quv := 1.3[CM C M + (1.67⋅CV C V)]
Quv = 384.15
Kgr/m
Horizontal CM := 0
CM = 0
Kgr/m
CV := F 1h
CV = 225
Kgr/m
Quh := 1.3[CM C M + (1.67⋅CV C V)] Qus := if(Quv > Quh , Quv Quv , Quh Quh)
Quh = 488.475 Qus = 488.475
Miembro Inferior: Vertical CM := Qba
CM = 45 Kgr/m
CV := 0
CV = 0
Quv := 1.3[CM C M + (1.67⋅CV C V)]
Kgr/m
Quv = 58.5 Kgr/m
Horizontal CM := 0
CM = 0
Kgr/m
Kgr/m Kgr/m
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Escogemos la mayor carga última: Qu := if(Qu Q us > Qui , Qus Qus , Qui Qui)
Qu = 976.95 Kgr/m
Diseño a Flexión
Momento de Diseño: Los pasamanos se consideran como una viga continua apoyada en los postes. Mu :=
1 (Qu⋅Sp2) 10
Mu = 386.677 Kgr/m
Canto Útil: Recubrimiento
r := 2.5 cm
Diametro del Fierro
φ := 1.0cm
d := (hb ⋅ 10 100) − r −
φ 2
d = 9.5 cm
Cuantía Necesaria:
Φ := 0.9
ρ :=
fc ⎛ ⋅ 1− 1.18 .18⋅ fy
1−
⎝
2.36 .36⋅ Mu
⎞ 2
Φ ⋅ fc⋅ ab⋅ d ⎠
Cuantía Balanceada
β1 := 0.85 ρb := 0.85⋅ β1⋅
⎛ 6090 ⎞ fc ⎝ 6090 + fy ⎠ fy
ρb = 0.025
Cuantia Máxima y Minima
ρmax := 0.75⋅ ρb
ρmax = 0.019
ρ = 0.008
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Cuantía de Diseño
ρ := if (ρ ≥ ρmin, ρ , ρmin)
ρ = 0.008
Acero de Refuerzo As := ρ ⋅ (ab⋅ 100) ⋅ d As = 1.172
cm2
P or Tanto: Tanto:
π ⋅φ Ao := 4
2
N°Barras :=
Ao = 0.785 As Ao
N°Barras = 1.493
N°Barras := 2
Usar : N°Barras = 2 de φ = 1
cm (en cada cara)
Area de acero proporcionado: Asprop := N°Bar Barras⋅ Ao Asp Asprop = 1.571 cm2/m Diseño a Corte
Fuerza Cortante Sp
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Fuerza Cortante resistida por el concreto mas estribos mínimos Diametro Diametro estribos estribos
φ := 0.6cm
Espaciamiento
s := 15
π ⋅φ Av := 4
cm
2
Av = 0.283
Vsc := 0.85⋅ 0.53⋅ fc⋅ (ab⋅ 100) ⋅ d +
0.85 .85⋅ 2⋅ Av⋅ fy⋅ d s
Vsc Vsc = 2293.597 Verificacion := if(Vsc > Vu , "cumple" , "no cumple" ) Verif Verific icac acio ion n = "cum cumple" le" Espaciamient spaciamiento o máximo por norma: d = 4.75 2
⎛ ⎝
Esp Espaciamiento := if s >
Usar :
φ = 0.6 cm
cm
d d ⎞ , ,s 2 2 ⎠
con con Espac Espacia iam mien iento = 4.75 .75
cm
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CALCULO CALCUL O DE POSTES Diseño a Flexión
Momentos Por Carga Muerta Barandado:
⎛ ⎝
Mba := 2⋅P Pb ba⋅ 0.1 −
ab ⎞ 2 ⎠
Mba = 4.476
Kgr.m
Postes: Mp1 Mp1 :=
ap1 ap1 ⋅ Pp1 2
Mp1 = 3.11
Kgr.m
Mp2 Mp2 :=
ap2 ⎛ ap2 ⎞ ap1 ⋅ Pp2 + ap1 ⎝ 3 ⎠
Mp2 = 2.534
Kgr.m
⎛ ⎝
Mp3 = 1.08
Kgr.m
Mp3 := ap1 + ap2 −
ap3 ap3 ⎞ ⋅ Pp3 2 ⎠
Total Total : Mcm := Mba + Mp1 + Mp2 Mp2 + Mp3 Mp3
Mcm = 11.201
Momentos Por Carga Viva Barandado: Superior:
⎛
MF 1v := P F 1v⋅ 0 1 −
ab ⎞
MF1v F1v = 7 461
(Kgr.m )
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Momento por Imp Impacto acto MI := 0 Momento de Diseño Mu := 1.3[Mcm + 1.67(Mc Mcv + MI)]
Mu = 1524.751
Canto Útil: Recubrimiento
r := 2.5 cm
Diametro del Fierror φ := 1.2cm d := [(ap1 + ap2) ⋅ 100] − r −
φ 2
d = 16.9
cm
Cuantía Necesaria
Φ := 0.9
ρ :=
fc ⎛ ⋅ 1− 1.18 .18⋅ fy
⎝
2.36 .36⋅ Mu
1−
⎞ 2
Φ ⋅ fc⋅ ep⋅ d ⎠
Cuantía Balanceada
β1 := 0.85
⎛ 6090 ⎞ fc
ρ = 0.008
Kgr/m
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Cuantía de Diseño
ρ := if (ρ ≥ ρmin, ρ , ρmin)
ρ = 0.008
Acero de Refuerzo As := ρ ⋅ (ep⋅ 100) ⋅ d
π ⋅φ Ao := 4
As = 2.582
cm2
2
N°Barras :=
Ao = 1.131 As Ao
φ = 1.2 N°Barras = 2.283
Usar :
2 φ de 1.2cm +1φ de 0.8 cm
(una cara)
Area de acer acero o prop propor orcio ciona nada da:: As =2.7 = 2.76 6
cm2
Acero Mínimo para Postes Según Norma Área de acero mínima para postes 1% de la sección del concreto 2
4 φ de 1.2cm +1φ de 0.8 cm Area Area de de ace acero ro prop propor orci cion onad ada: a:
(dos caras) As =5.02 =5.02
cm2
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Fuerza Cortante Resistida Por el Concreto Vc := 0.85⋅ 0.53⋅ fc⋅ (ep ⋅ 100) ⋅ d
Vc = 2407.584
Kgr
⎛ Vc < Vu , "Requiere estr ⎞ estribos" ibos" , "No requiere estribos" ⎝ 2 ⎠
Ver Verificacion := if
Verif Verific icac acio ion n = "Requie Requiere re est estri ribo bos" s" Fuerza Cortante resistida por el concreto mas estribos mínimos Diametro estribos
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Momento por Imp Impacto acto MI := 0 Momento de Diseño Mu := 1.3[Mcm + 1.67(Mc Mcv + MI)]
Mu = 1045.472
Canto Útil: Recubrimiento
r := 2.5
cm
Diametro del Fierro
φ := 1.2
cm
d := (ha ⋅ 10 100) − r −
φ 2
d = 11.9
Cuantía Necesaria Ancho de calculo:
b := 100
Φ := 0.9
⎛
⎞
cm
cm
Kgr/m
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Cuantía de Diseño
ρ := if (ρ ≥ ρmin, ρ , ρmin)
ρ = 0.003
Acero de Refuerzo As := ρ ⋅ b⋅ d
π ⋅φ Ao := 4
Ao = 1.131
As Ao
N°Barras := 4 N°Barras = 4
N°Barras = 3.507 (por metro de ancho) de φ = 1.2 cm
Area de acero proporcionado: A
cm2
2
N°Barras :=
Usar :
As = 3.967
N Ba
Ao
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Usar :
de φ = 1.2 cm
N°Barras = 3
(por metro de ancho)
Area de acero proporcionado: Asprop := N°Bar Barras⋅ Ao Asp Asprop = 3.393 cm2/m (En la cara superior, bajo la armadura negativa) Ac ero po r Ret rac ci ón y Tem per atu ra
Cuantía Minima por Temperatura: ρtem := 0.0020 Ast := ρtem⋅ d⋅ aa⋅ 100 Ast = 1.547 cm2/m
φ := 1.2 π ⋅φ Ao := 4 N°Barras :=
Ast
2
Ao = 1.131 N°Barras
1 368
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