Mathcad - Viga Con Acero a Compresion - Copy - 1

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    22-Aug-2014
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Transcript of Mathcad - Viga Con Acero a Compresion - Copy - 1

Viga con acero a compresion Propiedades de la seccionb 15in := fy 60ksi := est 38in 0.952 cm = :=h 22.5in := fc 4000psi :=rec 4cm :=d h 6cm 51.15 cm = := Mu 584kip ft :=Mn Mu0.9:=d1 4in :=Es 29000ksi :=y fyEs 2.069 10 3 = :=1 0.85 fc 4000.001psi < if0.85 0.05 fc 4000psi ( ) 1000psi

((

(( 4000psi fc < 8000psi < if0.65 fc 7999.99psi > if0.85 = :=fy fypsi 6 104 = := b 0.85 1 fc fy|

\ || 8700087000 fy +|

\ || 0.029 = :=max 0.75b 0.021 = := usando el % de b % 1 := % max 0.021 = := As1 b d 6.458 in2 = :=Determinacion momento x acero en tensionresitencia de seccion simplemente reforzadaMn1 0.9 b fy d2 1 0.59 fy ( )fc

(( 474.508 kip ft = :=Mn2 Mn Mn1 + 174.381 kip ft = :=Revision del acero a compresion "fluencia"a As1 fy 0.85 fc b 7.598 in = :=c a1 8.939 in = :=scc d1 c 0.003 0.00166 = := 0.00166 0.00207 < No. O. K fsc fy sc 0.00207 > ifsc0.00207|

\ || fy otherwise48.044 ksi = :=Area de acero requerida A'sAscMn2fsc d d1 ( ) 17.413 cm2 = :=Area de acero requerida a tension As.t Ast As1 Asc+ 59.078 cm2 = :=Numero de barras a tension "seleccion" Tension N3Ast.713cm282.859 = := N4Ast1.27cm246.518 = :=N5Ast1.98cm229.838 = := N6Ast2.85cm220.729 = :=N7Ast3.88cm215.226 = := N8Ast5.07cm211.653 = :=Usar #3 db 78in := n 15 := As 0.25 db ( )2 n 58.192 cm2 = :=As max permisible del acero a tension Asmax 0.75 b b d Asc+ 59.078 cm2 = :=Determinacion de espaciamiento de acero longitudinalsmin max db 25mm , ( ) 2.5 cm = :=s b 2 rec est + ( ) db + [ ]n 2.028 cm = :=fs 23 420 280 = := Cc 50 :=smax1 380 280fs|

\ || 2.5Cc 255 = := smax1 smax1 mm 0.255m = :=smax2 300 280fs|

\ || 300 = := smax2 smax2 mm 0.3m = :=smax smax1 smax1 smax2 < ifsmax2 otherwise25.5 cm = :=Compresion N3Asc.713cm224.422 = := N4Asc1.27cm213.711 = :=N5Asc1.98cm28.794 = := N6Asc2.85cm26.11 = :=N7Asc3.88cm24.488 = := N8Asc5.07cm23.434 = :=Usar #3 db 88in := n 1 := As 0.25 db ( )2 n 5.067 cm2 = :=Determinacion de espaciamiento de acero longitudinal a compresionsmin max db 25mm , ( ) 2.54 cm = :=s b 2 rec est + ( ) db + [ ]n 30.735 cm = :=fs 23 420 280 = := Cc 50 :=smax1 380 280fs|

\ || 2.5Cc 255 = := smax1 smax1 mm 0.255m = :=smax2 300 280fs|

\ || 300 = := smax2 smax2 mm 0.3m = :=smax smax1 smax1 smax2 < ifsmax2 otherwise25.5 cm = :=Verificacion de la capacidad a flexion