vigas de cimentación (casa betsy)

7/29/2019 Vigas de cimentacin (Casa Betsy)

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CALCULO DE ZAPATAS CONECTADAS


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VIGA DE CONEXION

L1 = 4.15 m UTILIZAR

h = 0.5 m 0.5 m

b = 0.25 m 0.25 m

P1u= 36.2 TnWvu= 0.42 Tn/m

M2 = 0

Rnu (3.65) = P1u x 4.15 +0.42 x 4.275^2/2

Rnu = 42.21 Tn

Rnu

S

SECCION DE MOMENTO MAXIMO

Vx = (Wnu - Wvu)Xo - P1u = 0

Xo = 1.09 m < S 1.25 m

Mumax = (Wnu - Wvu)(xo^2/2)-(P1u(xo-(t1/2)))

Mumax = -15.121 Tn/m2

Recubrimiento Estribo Acero d d As

0.05 3/8 1 0.4278 42.78 18.7

UTILIZAR 3 Varillas 1/2 '' = 3.80 cm2

= 0.00355 > min = 0.00333 CONFORME

REFUERZO EN LA CARA INFERIOR

As+ = As-/3 As-/2 As min

As = 1.9 cm2

As min = 3.56 cm2

UTILIZAR 3 Varillas 1/2 '' = 3.80 cm2

DISENO POR CORTE

V1u = (Wnu - Wvu) (t1+ d) - P1u

V1u = 33.35 ( 0.25 + 0.43 ) - 36.2 = -13.595 Tn

V2u = (Wnu - Wvu) S - P1u

Wnu = = 33.77 Tn/m


3/7

V2u = 33.35 ( 1.25 ) - 36.2 = 5.49 Tn

Vu 5.49

0.85

Vc =0.53 210 (10) (0.25) (0.43 ) = 8.21 Tn CONFORME

Tn= = 6.46


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CONFORME


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DIMENSIONAMIENTO DE LA ZAPATA EXTERIOR

1.20 P1n

PD = 21 Tn

PL = 4 Tn

P1 = 25 Tn

n = 9.6 Tn/m2Az = 3.13 m2

T=2S

2S^2= 3.13 m2

S = 1.25 m

Wv = 0.25 x 0.5 x 2.4 0.3 Tn/m

M2 = 0

DIMENSIONES DE LA COLUMNA

Ancho = 0.25 m

Largo = 0.25 m

Ubic. de Rn = 3.65 m

RN(3.65)= P1 x 4.15 + 0.3 x 4.275^2/2

RN = 29.18 Tn

RN

n

2.43 m

USAR 2 m

UTILIZAR T x S = 2 x 1.25

DISENO DE LA ZAPATA EXTERIOR

Wnu = Rnu/T Mu max f'y f'c b21.11 8.08 0.004 4200 210 0.08 125

DISENO POR CORTE

Vud = Wnu (Iv - d)

Wnu Iv d Vud Vn Vc

21.11 0.875

Az =

Az = 3.04 m2

3.04 = T x S = T x 1.25 =


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DISENO POR FLEXION

Recubrimient Estribo Acero d As

0.075 3/8 3/4 41.55 5.71618168


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d Asumir d

21.18 50

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