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INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO

ESTUDIANTE: BRYAN ALEXANDER MATTA VALDIVIEZO

DOCENTE: ING. IVÁN LEÓN MALO ASIGNATURA: INGENIERÍA ANTISÍSMICA TEMA: TRABAJO: ANALISIS MODAL CON CARGA DINAMICA FACULTAD: INGENIERÍA CIVIL CICLO: IX

INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO

ELEMENTO Columna 2,8m Colunma 3,0m Viga 3,5m Viga 4,0m Ec

ELEMENTO COLUMNA 2,8 m COLUMNA 3,0 m VIGA 3,5 m VIGA 4,0 m

b(m) h(m) 0.3 0.4 0.3 0.4 0.3 0.4 0.3 0.4 2188197.9 Tn/m2

AE/L EI 93779.91 87527.92 75023.93 65645.94

longitud (m) 2.8 3 3.5 4

Area (m2) 0.12 0.12 0.12 0.12

2EI/L 3501.12 2500.80 3501.12 2334.08 3501.12 2000.64 3501.12 1750.56

4EI/L

5001.60 4668.16 4001.28 3501.12

Inercia (m4) 0.0016 0.0016 0.0016 0.0016

φ

6EI/L^2

12EI/L^3

2679.43 2334.08 1714.83 1312.92

90 90 0 0

1913.88 1556.05 979.90 656.46

44g 45g

43g

36

INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO

INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO Matriz Local AE/L 0

0

0

12EI/L3

6EI/L2

-AE/L 0

0

0

-12EI/L3

6EI/L2

87527.92 0 0 -87527.92 0 2 87527.92 -87527.92 0 4EI/L 0 2EI/L 6EI/L2 0 0 0 1556.05 2334.08 -6EI/L 0 -1556.05 1556.05 2334.08 0 -AE/L 00 0 AE/L 0 0 -1556.05 KL columna L=3.0m = 03 2334.08 4668.16 0 -2334.08 2 3 0 = 04668.16 12EI/L 0 -6EI/L2-2334.08 KL columna L=3.0m 0 2334.08 -12EI/L -6EI/L -87527.92 0 0 87527.92 0 2 0 2EI/L 0 0 0 4EI/L 6EI/L2 -6EI/L -87527.92 87527.92 0 0 -1556.05 -2334.08 0 1556.05 0 -1556.05 -2334.08 0 1556.05 Reemplazando valores 0 2334.08 2334.08 0 -2334.08 0 2334.08 2334.08 0 -2334.08

KL =

0

K columna L=2.8m = KL Lcolumna L=2.8m =

KLKcolumna L=3.0m= = L viga L=4.0m = = KKLL columna viga L=4.0m L=3.0m

KLKcolumna L=2.8m= = L viga L=3.5m = = KKLL columna viga L=3.5m L=2.8m

KL viga L=4.0m = KL viga L=4.0m =

KL viga L=3.5m = KL viga L=3.5m =

0 0 2334.08 2334.08 2334.08 2334.08 0 0 -2334.08 -2334.08 4668.16 4668.16

93779.91 93779.91 0 0 0 0 -93779.91 -93779.91 0 0 0 0

0 0 1913.88 1913.88 2679.43 2679.43 0 0 -1913.88 -1913.88 2679.43 2679.43

0 0 2679.43 2679.43 5001.60 5001.60 0 0 -2679.43 -2679.43 2500.80 2500.80

-93779.91 -93779.91 0 0 0 0 93779.91 93779.91 0 0 0 0

0 0 -1913.88 -1913.88 -2679.43 -2679.43 0 0 1913.88 1913.88 -2679.43 -2679.43

0 0 2679.43 2679.43 2500.80 2500.80 0 0 -2679.43 -2679.43 5001.60 5001.60

87527.92 65645.94 65645.94 87527.92 0 0 00 0 0 0 0 -87527.92 -65645.94 -65645.94 -87527.92 0 0 00 0 0 00

0 0 00 1556.05 656.46 656.46 1556.05 2334.08 1312.92 1312.92 2334.08 0 0 0 0 -1556.05 -656.46 -656.46 -1556.05 2334.08 1312.92 1312.92 2334.08

0 0 00 2334.08 1312.92 1312.92 2334.08 4668.16 3501.12 3501.12 4668.16 0 0 0 0 -2334.08 -1312.92 -1312.92 -2334.08 2334.08 1750.56 1750.56 2334.08

-87527.92 -65645.94 -65645.94 -87527.92 0 0 00 0 0 0 0 87527.92 65645.94 65645.94 87527.92 0 0 00 0 0 00

0 0 00 -1556.05 -656.46 -656.46 -1556.05 -2334.08 -1312.92 -1312.92 -2334.08 0 0 0 0 1556.05 656.46 656.46 1556.05 -2334.08 -1312.92 -1312.92 -2334.08

0 0 0 2334.08 1312.92 1312.92 2334.08 2334.08 1750.56 1750.56 2334.08 0 0 0 -2334.08 -1312.92 -1312.92 -2334.08 4668.16 3501.12 3501.12 4668.16

93779.91 75023.93 75023.93 93779.91 0 0 00 0 0 0 0 -93779.91 -75023.93 -75023.93 -93779.91 0 0 00 0 0 00

0 0 0 0 1913.88 979.90 979.90 1913.88 2679.43 1714.83 1714.83 2679.43 0 0 0 0 -1913.88 -979.90 -979.90 -1913.88 2679.43 1714.83 1714.83 2679.43

0 0 0 0 2679.43 1714.83 1714.83 2679.43 5001.60 4001.28 4001.28 5001.60 0 0 0 0 -2679.43 -1714.83 -1714.83 -2679.43 2500.80 2000.64 2000.64 2500.80

-93779.91 -75023.93 -75023.93 -93779.91 0 0 00 0 0 0 0 93779.91 75023.93 75023.93 93779.91 0 0 00 0 0 00

0 0 0 0 -1913.88 -979.90 -979.90 -1913.88 -2679.43 -1714.83 -1714.83 -2679.43 0 0 0 0 1913.88 979.90 979.90 1913.88 -2679.43 -1714.83 -1714.83 -2679.43

0 0 0 2679.43 1714.83 1714.83 2679.43 2500.80 2000.64 2000.64 2500.80 0 0 0 -2679.43 -1714.83 -1714.83 -2679.43 5001.60 4001.28 4001.28 5001.60

65645.94 65645.94 0 0 0

0 0 656.46 656.46 1312.92

0 0 1312.92 1312.92 3501.12

-65645.94 -65645.94 0 0 0

0 0 -656.46 -656.46 -1312.92

0 0 1312.92 1312.92 1750.56

0 -65645.94 -65645.94 0 0 0 0

1312.92 0 0 -656.46 -656.46 1312.92 1312.92

3501.12 0 0 -1312.92 -1312.92 1750.56 1750.56

0 65645.94 65645.94 0 0 0 0

-1312.92 0 0 656.46 656.46 -1312.92 -1312.92

1750.56 0 0 -1312.92 -1312.92 3501.12 3501.12

75023.93 75023.93 0 0 0

0 0 979.90 979.90 1714.83

0 0 1714.83 1714.83 4001.28

-75023.93 -75023.93 0 0 0

0 0 -979.90 -979.90 -1714.83

0 0 1714.83 1714.83 2000.64

0 -75023.93 -75023.93 0 0 0 0

1714.83 0 0 -979.90 -979.90 1714.83 1714.83

4001.28 0 0 -1714.83 -1714.83 2000.64 2000.64

0 75023.93 75023.93 0 0 0 0

-1714.83 0 0 979.90 979.90 -1714.83 -1714.83

2000.64 0 0 -1714.83 -1714.83 4001.28 4001.28

INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO Columna(2,8m) , elementos 2,3,5,6,8,9,111,12,14,15 Ф=

Tg =

1 0

cosφ

senφ

0

0

0

0

0.00

1.00

0.00

0.00

0.00

0.00

-senφ

cosφ

0

0

0

0

-1.00

0.00

0.00

0.00

0.00

0.00

0

0

1

0

0

0

0.00

0.00

1.00

0.00

0.00

0.00

0

0

0

cosφ

senφ

0

0.00

0.00

0.00

0.00

1.00

0.00

0

0

0

-senφ

cosφ

0

0.00

0.00

0.00

-1.00

0.00

0.00

0

0

0

0

0

1

0.00

0.00

0.00

0.00

0.00

1.00

AE/L 0 KL =

senФ = cosФ =

90

0

0

Kg = columna L=2.8m 12EI/L^3 6EI/L^2

0

6EI/L^2

4EI/L

-AE/L

0

0

0

-12EI/L^3 -6EI/L^2

0

6EI/L^2

2EI/L

1913.88 0.00 0 -AE/L

=

0.00 93779.91 0

-2679.43 0.00 93779.91

0.00 0-2679.43 -12EI/L^3 6EI/L^2 0-1913.88 -6EI/L^2

0.00 2EI/L

=

AE/L 0.00 0 0 -93779.91 0-2679.43 12EI/L^3 -6EI/L^2 0.00 0

-6EI/L^2

4EI/L

5001.60 0 2679.43 0 -93779.91 0.00 2500.80 0 0

-1913.88 0.00 0

0.00 -2679.43 -93779.91 0 -93779.91 0.00 0 0 2679.43 1913.88 2679.43 0.00 0 2500.80 -1913.88 2679.43 1913.88 5001.60 0.00 2679.43 0 2679.43 -2679.43 2500.80 0 0 93779.91 0.00 0 0 0.00 93779.91 -1913.88 -2679.43 0 1913.88 -2679.43 2679.43 0.00 5001.60 2679.43 2500.80 0 -2679.43 5001.60

Columna (3,0m) , elementos 1, 4,7,10,13 Ф=

Tg =

senφ

0

0

0

0

0.00

1.00

0.00

0.00

0.00

0.00

-senφ

cosφ

0

0

0

0

-1.00

0.00

0.00

0.00

0.00

0.00

0

0

1

0

0

0

0.00

0.00

1.00

0.00

0.00

0.00

0

0

0

cosφ

senφ

0

0.00

0.00

0.00

0.00

1.00

0.00

0

0

0

-senφ

cosφ

0

0.00

0.00

0.00

-1.00

0.00

0.00

0

0

0

0

0

1

0.00

0.00

0.00

0.00

0.00

1.00

AE/L

Kg columna 0 L=3.0m0=

0

12EI/L^3

6EI/L^2

0

6EI/L^2

4EI/L

-AE/L

0

0

0.00 87527.92

-2334.08 0.00

-2334.080 -AE/L

00.00 0 -12EI/L^3 6EI/L^2 -1556.05 0.00 0 0.00 -6EI/L^2 -87527.92 2EI/L = AE/L 0 0 -2334.08 0.00

0

-12EI/L^3 -6EI/L^2

0

0

6EI/L^2

0

2EI/L

=

12EI/L^3 -6EI/L^2

Viga (3,5m), elementos 16, 20, -6EI/L^2 19, 23, 4EI/L 24, 27 Ф=

Tg =

0

-1556.05 0.00

0.00 -87527.92

-2334.08 0.00

4668.16 87527.92 2334.08 0 00.00 -87527.92 2334.080 0 2334.08 -1556.05 2334.08 0 1556.05 1556.05 2334.080.00 0.00 0 2334.08 0.00 4668.16 87527.92 0 -2334.08 0.00 -87527.92 0 0 87527.92 2334.08 2334.08 0.00 4668.160 0 -1556.05 -2334.08 0 1556.05 0 2334.08 2334.08 0 -2334.08

senФ = cosФ =

0 2334.08 2334.08 0 -2334.08 4668.16

0 1

cosφ

senφ

0

0

0

0

1.00

0.00

0.00

0.00

0.00

0.00

-senφ

cosφ

0

0

0

0

0.00

1.00

0.00

0.00

0.00

0.00

0

0

1

0

0

0

0.00

0.00

1.00

0.00

0.00

0.00

0

0

0

cosφ

senφ

0

0.00

0.00

0.00

1.00

0.00

0.00

0

0

0

-senφ

cosφ

0

0.00

0.00

0.00

0.00

1.00

0.00

0

0

0

0

0

1

0.00

0.00

0.00

0.00

0.00

1.00

AE/L

0

0

75023.93 0-AE/L

0 Kg

KL =

1 0

cosφ

1556.05 0.00

KL =

senФ = cosФ =

90

0 0 979.900 -12EI/L^3 6EI/L^2 1714.83

12EI/L^3 6EI/L^2 0 0 viga L=3.5m = 0 6EI/L^2 4EI/L 0 -6EI/L^2 0 2EI/L -75023.93 -AE/L 0 0 AE/L 0 0 0

-12EI/L^3 -6EI/L^2

0

6EI/L^2

2EI/L

0 0 0

0

-979.90 -6EI/L^2 1714.83

12EI/L^3

-6EI/L^2

4EI/L

=

0 -75023.93 75023.93 1714.83 0 0

0 0 0 -75023.93 1714.83 0 -979.90

0 979.90 4001.28 0 = 0 075023.93 1714.83 -75023.93 -1714.83 0 0 0 -979.90 2000.64 0 0 1714.83

1714.83 -979.90 -1714.83 0 2000.64 4001.28 0 0 -1714.83 0 0 75023.93 0 979.90 -1714.83 -1714.83 0 979.90 -1714.83 4001.28 2000.64 0 -1714.83

0 1714.83 2000.64 0 -1714.83 4001.28

INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO Viga(4,0m) , elementos 17,18,21,22,25,26 Ф=

Tg =

senФ = cosФ =

0 1

cosφ

senφ

0

0

0

0

1.00

0.00

0.00

0.00

0.00

0.00

-senφ

cosφ

0

0

0

0

0.00

1.00

0.00

0.00

0.00

0.00

0

0

1

0

0

0

0.00

0.00

1.00

0.00

0.00

0.00

0

0

0

cosφ

senφ

0

0.00

0.00

0.00

1.00

0.00

0.00

0

0

0

-senφ

cosφ

0

0.00

0.00

0.00

0.00

1.00

0.00

0

0

0

0

0

1

0.00

0.00

0.00

0.00

0.00

1.00

AE/L

0

0

0

0.00 656.460

0 KL =

0

0 -AE/L 0 0

65645.94 -AE/L 0.00

=

0.00 -65645.94 65645.94 1312.92 0.000

0.00 0.00 0 -65645.94 -656.46 1312.92 0

656.46 1312.92 0 -656.46 3501.12 0 0.00 -1312.92 1750.56 0 -6EI/L^2 2EI/L = 0 1312.92 3501.12 0 0.00 -1312.92 -65645.94 0.00 0.00 65645.94 0.00 0 0 AE/L 0 0 -65645.94 0 0 65645.94 0 0.00 -656.46 -1312.92 0.00 656.46 -1312.92 -12EI/L^3 -6EI/L^2 0 12EI/L^3 -6EI/L^2 0 -656.46 -1312.92 0 656.46 0.00 1312.92 1750.56 0.00 -1312.92 3501.12 6EI/L^2 2EI/L 0 -6EI/L^2 4EI/L 0 1312.92 1750.56 0 -1312.92

6EI/L^2 Kg12EI/L^3 viga L=4.0m = 6EI/L^2 4EI/L

0 -12EI/L^3 6EI/L^2 0.00 1312.92

MATRIZ DE RIGIDEZ CONDENSADA

Para este caso, se considerarán 3GDL o lo que es 1 por nivel

K lateral = condensada

11777.50

-6239.06

685.24

-6239.06

10714.55

-5209.42

685.24

-5209.42

4527.59

Tn/m

0 1312.92 1750.56 0 -1312.92 3501.12

INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO DETERMINACIÓN DE LA MATRIZ DE MASA Y DE LOS VALORES PROPIOS

Peso Muerto Primer piso: Segundo piso: Tercer piso:

= = =

3.408 x 3.288 x 2.568 x

2.4 2.4 2.4

= = =

8.1792 7.8912 6.1632

+ + +

1.4 1.4 1.4

x x x

13.4 13.4 13.4

= = =

Peso Vivo Primer piso: Segundo piso: Tercer piso:

= = =

0.5 x 0.5 x 0.5 x

Peso total: 100%PM + 50%PV

13.4 13.4 13.4

= = =

6.7 6.7 6.7

Tn Tn Tn

Masa total:

Primer piso:

30.29

Tn

Primer piso:

3.088

Tn.seg 2/m

Segundo piso:

30.00

Tn

Segundo piso:

3.058

Tn.seg 2/m

Tercer piso:

28.27

Tn

Tercer piso:

2.882

Tn.seg 2/m

Sabemos que matricialmente:

Haciendo: Artificio para poder reemplazar en la matriz "M"

26.9392 26.6512 24.9232

Tn Tn Tn

INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO 1) Ensamblamos la matriz de rigidez "K" (matriz de rigidez lateral condensada)

KL =

KL =

11777.50

-6239.06

685.24

-6239.06

10714.55

-5209.42

685.24

-5209.42

4527.59

1K

-0.5297K

0.0582K

-0.5297K

0.9097K

-0.4423K

0.0582K

-0.4423K

0.3844K

Tn/m

Haciendo K = 11777.50 para trabajar todo en funciòn de "K"

Tn/m

2) Ensamblando la matriz de masas "M" m1

0

0

0

m2

0

0

0

m3

M=

1.139m 0 0

0 1.128m 0

0 0 1m

0

M=

kλ/w2 0 0

0 0

M=

kλ/w 0

2

3.088

0

0

0 0

3.058 0

0 2.711

=

Tn.seg2/m

Hacemos m = 2.711 para trabajar todo en función de "m"

kλ/w2

Ahora reemplazando la matriz de rigidez y de masa en la ecuaciòn (1)

det |

1K -0.5297K 0.0582K

-0.5297K 0.9097K -0.4423K

0.0582K -0.4423K 0.3844K

ω^2*(kλ/ω^2)

-

1.139 0 0

0 1.128 0

0 0 1

|=

0

Simplificando "w2" y factorizando "K", tenemos:

det |

det =

1.0000 -0.5297 0.0582

-0.5297 0.9097 -0.4423

0.0582 -0.4423 0.3844

1 - 1.139λ -0.5297 0.0582 -0.5297 0.9097 - 1.128λ -0.4423 0.0582 -0.4423 0.3844 - 1λ

1.139λ 0 0

-

=

0 1.128λ 0

0 0 1λ

|=

0

3) Hallando la determinante de la matriz encontramos las 4 raíces (Eigenvalores). Ordenando de menos a más:

λ1 = λ2 = λ3 = Del artificio:

0.06613 0.58374 1.41897

0

INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO

K=

11777.50

m=

2.711

Tn/m Tn.seg2/m

Reemplazando estos valores en la ecuación (2), se tiene las frecuencias y periodos: w1 = w2 = w3 =

16.95 50.36 78.51

rad/seg rad/seg rad/seg

T1 = T2 = T3 =

0.3707 0.1248 0.0800

rad/seg rad/seg rad/seg

4) Para calcular las formas de modo, reemplazamos cada valor de λi en la siguiente ecuación:

1 - 1.139λ -0.5297 0.0582

-0.5297 0.9097 - 1.128λ -0.4423

0.0582 -0.4423 0.3844 - 1λ

Ф1 Ф2 Ф3

x

=

0

Columna Ф1, considerando Ф1=1 0.9247 -0.5297 0.0582

-0.5297 0.8351 -0.4423

0.0582 -0.4423 0.3183

1 Ф2 Ф3

x

=

Ф1 Ф2 Ф3

0

1 2.03662 2.6477

=

Columna Ф2, considerando Ф1=1 0.3353 -0.5297 0.0582

-0.5297 0.2513 -0.4423

0.0582 -0.4423 -0.1993

x

1 Ф2 Ф3

=

Ф1 Ф2 Ф3

=

1 Ф2 Ф3

=

Ф1 Ф2 Ф3

=

0

1 0.53124 -0.89577

Columna Ф3, considerando Ф1=1 -0.6159 -0.5297 0.0582

-0.5297 -0.6908 -0.4423

0.0582 -0.4423 -1.0346

x

0

1 -1.10474 0.52782

INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO En forma modal tenemos la matriz de Eigenvectores: Ф1 1 2.03662 2.6477

Ф=

Ф2 1 0.53124 -0.89577

Ф3 1 -1.10474 0.52782

5) Cálculo del periodo fundamental por el método de Rayleigh:

M1 = M2 = M3 =

3.088 3.058 2.882

Tn.seg2/m Tn.seg2/m Tn.seg2/m

P1 = P2 = P3 =

1 2 3

Tn Tn Tn

μ1 = μ2 = μ3 =

0.0012715 0.0026230 0.0034881

m m m

T= 0.38 seg Periodo fundamental Por tanto, uno puede concluir que el metodo de Rayleigh es independiente de las fuerzas supuestas y uno lo peude demostrar que el periodo no cambia al variar las fuerzas.

INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO DETERMINACIÓN DE LA MATRIZ DE AMORTIGUAMIENTO POR CAUGHEY 1) La serie de Caughey para un sistema de 3 grados de libertad es:

2) Determinando a0, a1 y a2 a partir de la siguiente ecuación:

Matricialmente: 0.06083 0.02047 0.01313

16.44 48.84 76.15

4442.410 116506.467 441550.796

0.06083 0.02047 0.01313

16.43890 48.84086 76.14830

4442.410 116506.467 441550.796

x

a0 a1 a2

x

=

2*

a0 a1 a2

=

0.10 0.10 0.10

a0 a1 a2

=

1.144590401 0.001883406 -0.000000132

0.05 0.05 0.05

3) Calculando la matriz de amortiguamiento reemplazando los valores de a0, a1 y a2 en la serie:

a0m =

3.534 0.000 0.000

0.000 3.500 0.000

0.000 0.000 3.299

a1k =

22.182 -11.751 1.291

-11.751 20.180 -9.811

1.291 -9.811 8.527

-7.6533

6.2077

-1.8953

6.2077 -1.8953

-7.8844 3.6826

3.6826 -2.1363

C=

18.0626 -5.5429 -0.6047

-5.5429 15.7959 -6.1289

-1

a2k(m )k =

-0.6047 -6.1289 9.6898

INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO

RESPUESTA DINÁMICA - ANÁLISIS MODAL Para determinar la respuesta dinámica de una estructura de varios grados de libertad se puese utilizar el procedimiento de análisis modal. Se obtiene la respuesta por separado para cada modo, modelando cada uno de ellos como un sistema de simple grado de libertad (1GDL). En el gráfico se muestra lo siguiente:

SISTEMA 3GDL

DEFORMADA FINAL

La solución o respuesta final se determinará mediante la contribución modal de cada oscilador:

La solución o respuesta final se determinará mediante la contribución modal de cada oscilador:

La matriz modal es:

Ф=

Modo 1 1 2.0366 2.6477

Modo 2 1 0.5312 -0.8958

Modo 3 1 -1.1047 0.5278

u1(t) = q1 + q1 + q3 u2(t) = 2.03662q1 + 0.5312q2 +(-1.1047)q3 u3(t) = 2.6477q1 + (-0.8958)q2 + 0.5278q3

Este procedimiento se conoce como el análisis modal clásico o el método de superposición de modos clásico porque las ecuaciones modales individuales (desacopladas) se resuelven a fin de determinar las coordenadas modales qn(t) y las respuestas modales un(t) para después combinarlas y obtener la respuesta total u(t). CÁLCULO DE Kn, Mn, Cn y Pn 1) Para hallar el "Kn" (Matriz de rigidez generalizada) debemos aplicar la siguiente fórmula:

La transpuesta de la matriz modal quedará:

T

Ф n=

1

2.03662

2.6477

1 1

0.53124 -1.10474

-0.89577 0.52782

La matriz de rigidez ya hallada es:

K lateral =

11777.50 -6239.06 685.24

-6239.06 10714.55 -5209.42

685.24 -5209.42 4527.59

T n/m

INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO La matriz de rigidez ya hallada es:

K lateral =

11777.50 -6239.06 685.24

-6239.06 10714.55 -5209.42

685.24 -5209.42 4527.59

T n/m

-12.42 15535.76 58.70

-2.56 58.70 46699.16

T n/m

Por lo tanto la "Kn" quedará:

Kn =

9992.74 -12.42 -2.56

2) Para hallar el "Mn" debemos aplicar la siguiente fórmula:

La matriz de masa ya hallada es:

M=

3.088 0.000 0.000

0.000 3.058 0.000

0.000 0.000 2.882

35.98

-0.44

0.23

-0.44

6.26

-0.07

0.23

-0.07

7.62

Por lo tanto la "Mn" quedará:

Mn =

T n.seg2 /m

3) Para hallar el "Cn" debemos aplicar la siguiente fórmula:

La matriz de amortiguamiento ya hallada es:

C=

18.06 -5.54 -0.60

-5.54 15.80 -6.13

-0.60 -6.13 9.69

-0.56 31.32 -0.17

0.32 -0.17 58.80

Por lo tanto la "Cn" quedará:

Cn =

59.63 -0.56 0.32

T n.seg/m

4) Para hallar el "Pn(t)" debemos aplicar la siguiente fórmula:

Como dato del problema, nos dice que la fuerza se aplica en todos los niveles

Cn =

59.63 -0.56 0.32

-0.56 31.32 -0.17

0.32 -0.17 58.80

Tn.seg/m

INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO

4) Para hallar el "Pn(t)" debemos aplicar la siguiente fórmula:

Como dato del problema, nos dice que la fuerza se aplica en todos los niveles

INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO

I. Datos del sistema (ingresar): Condiciones

m=

35.977

T n*s2 / m

Δt =

Pésimo Óptimo

0.1 0.05

s s

u(0) = u'(0) =

0 0

0.001

s

Po =

0

ξ= T=

Ideal 0.05 0.38

II. Datos calculados : K= Wn = c=

9992.737 16.666 59.631

s

T n/m rad/s T n*s / m

III. Método de la aceleración lineal: β= 1/4 γ= 1/2 IV. Cálculos iniciales:

Pésimo Óptimo Ideal

a1

a2

a3

15583.37 59948.21 144026644.80

1498.71 2937.78 143967.01

35.977 35.977 35.977

Umax pésimo Umáx óptimo Umáx ideal

0.0042602 m 0.0042616 m 0.0042610 m

25576.103 69940.946 144036637.536

INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO PÉSIMO

ÓPTIMO Desplazamiento

IDEAL Desplazamiento

Desplazamiento

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5

0 0.853 1.705 2.558 3.411 4.263 5.116 5.969 6.821 7.674 8.526 9.379 10.232 11.084 11.937 12.790

0 0.853 3.704 7.322 9.391 10.233 12.057 15.331 18.214 19.648 20.937 23.491 26.611 28.779 30.106 32.007

0 0.0000333 0.0001448 0.0002863 0.0003672 0.0004001 0.0004714 0.0005994 0.0007122 0.0007682 0.0008186 0.0009185 0.0010405 0.0011252 0.0011771 0.0012514

0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 0.7 0.75

0 0.426 0.853 1.279 1.705 2.132 2.558 2.984 3.411 3.837 4.263 4.690 5.116 5.542 5.969 6.395

0 0.426 2.285 6.122 11.314 16.507 20.439 22.653 23.708 24.783 26.970 30.647 35.317 39.949 43.603 45.963

0 0.0000061 0.0000327 0.0000875 0.0001618 0.0002360 0.0002922 0.0003239 0.0003390 0.0003543 0.0003856 0.0004382 0.0005050 0.0005712 0.0006234 0.0006572

0 0.001 0.002 0.003 0.004 0.005 0.006 0.007 0.008 0.009 0.01 0.011 0.012 0.013 0.014 0.015

0 0.0085 0.0171 0.0256 0.0341 0.0426 0.0512 0.0597 0.0682 0.0767 0.0853 0.0938 0.1023 0.1108 0.1194 0.1279

0 0.009 0.051 0.162 0.375 0.724 1.242 1.964 2.923 4.152 5.686 7.556 9.796 12.439 15.517 19.064

0 0.0000000 0.0000000 0.0000000 0.0000000 0.0000000 0.0000000 0.0000000 0.0000000 0.0000000 0.0000000 0.0000001 0.0000001 0.0000001 0.0000001 0.0000001

1.6 1.7 1.8 1.9 2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3

13.642 14.495 15.348 16.200 17.053 17.906 18.758 19.611 20.464 21.316 22.169 23.021 23.874 24.727 25.579

34.869

0.0013633

6.821 7.248 7.674 8.100 8.526 8.953 9.379 9.805 10.232 10.658 11.084 11.511 11.937 12.363 12.790

0.0006788 0.0007011 0.0007357 0.0007864 0.0008474 0.0009077 0.0009571 0.0009925 0.0010192 0.0010467 0.0010837 0.0011328 0.0011895 0.0012452 0.0012926

0.1364 0.1450 0.1535 0.1620 0.1705 0.1791 0.1876 0.1961 0.2046 0.2132 0.2217 0.2302 0.2387 0.2473 0.2558

0.0000002

49.036 51.457 55.001 59.271 63.483 66.938 69.419 71.280 73.205 75.795 79.229 83.193 87.090 90.404

0.016 0.017 0.018 0.019 0.02 0.021 0.022 0.023 0.024 0.025 0.026 0.027 0.028 0.029 0.03

23.111

0.0014677 0.0015356 0.0015976 0.0016907 0.0017999 0.0018863 0.0019504 0.0020274 0.0021292 0.0022277 0.0023026 0.0023725 0.0024619 0.0025626

0.8 0.85 0.9 0.95 1 1.05 1.1 1.15 1.2 1.25 1.3 1.35 1.4 1.45 1.5

47.474

37.539 39.274 40.859 43.242 46.035 48.245 49.883 51.854 54.456 56.975 58.892 60.678 62.965 65.542

27.691 32.835 38.575 44.943 51.971 59.688 68.126 77.316 87.288 98.072 109.698 122.194 135.591 149.917

0.0000002 0.0000002 0.0000003 0.0000003 0.0000004 0.0000004 0.0000005 0.0000005 0.0000006 0.0000007 0.0000008 0.0000008 0.0000009 0.0000010

INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO

INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO

GRÁFICA DESPLAZAMIENTO - TIEMPO 0.005 0.004

Desplazamiento (m)

0.003 0.002 0.001 0 0

0.5

1

1.5

2

2.5

3

3.5

4

-0.001 -0.002

-0.003 -0.004 -0.005

Tiempo (seg) PÉSIMO

ÓPTIMO

IDEAL

4.5

5

5.5

6

6.5

7

INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO

I. Datos del sistema (ingresar): m=

6.263

Tn*s2 / m

Pésimo Δt = ξ= T=

Óptimo Ideal 0.05 0.13

II. Datos calculados : K= 15535.757 Wn = 49.804 c= 31.323

Condiciones

0.05 0.005

s s

u(0) = u'(0) =

0 0

0.001

s

Po =

0

s

Tn/m rad/s Tn*s / m

III. Método de la aceleración lineal: β= 1/4 γ= 1/2 IV. Cálculos iniciales:

Pésimo Óptimo Ideal

a1

a2

a3

11274.12 1014650.08 25115670.00

532.38 5041.93 25084.35

6.263 6.263 6.263

Umax pésimo Umáx óptimo Umáx ideal

0.0003067 m 0.0003067 m 0.0003067 m

26809.877 1030185.839 25131205.752

INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO PÉSIMO

ÓPTIMO Desplazamiento

IDEAL Desplazamiento

Desplazamiento

0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 0.7 0.75

0 0.0477 0.0953 0.1430 0.1906 0.2383 0.2860 0.3336 0.3813 0.4289 0.4766 0.5243 0.5719 0.6196 0.6672 0.7149

0 0.048 0.171 0.268 0.307 0.394 0.513 0.576 0.632 0.743 0.837 0.889 0.973 1.082 1.151 1.215

0 0.0000018 0.0000064 0.0000100 0.0000114 0.0000147 0.0000191 0.0000215 0.0000236 0.0000277 0.0000312 0.0000331 0.0000363 0.0000404 0.0000429 0.0000453

0 0.005 0.01 0.015 0.02 0.025 0.03 0.035 0.04 0.045 0.05 0.055 0.06 0.065 0.07 0.075

0 0.0048 0.0095 0.0143 0.0191 0.0238 0.0286 0.0334 0.0381 0.0429 0.0477 0.0524 0.0572 0.0620 0.0667 0.0715

0 0.005 0.028 0.087 0.197 0.369 0.609 0.921 1.304 1.751 2.253 2.797 3.370 3.954 4.533 5.091

0 0.0000000 0.0000000 0.0000001 0.0000002 0.0000004 0.0000006 0.0000009 0.0000013 0.0000017 0.0000022 0.0000027 0.0000033 0.0000038 0.0000044 0.0000049

0 0.001 0.002 0.003 0.004 0.005 0.006 0.007 0.008 0.009 0.01 0.011 0.012 0.013 0.014 0.015

0 0.0010 0.0019 0.0029 0.0038 0.0048 0.0057 0.0067 0.0076 0.0086 0.0095 0.0105 0.0114 0.0124 0.0133 0.0143

0 0.001 0.006 0.018 0.042 0.080 0.138 0.217 0.323 0.457 0.624 0.827 1.069 1.353 1.681 2.057

0 0.0000000 0.0000000 0.0000000 0.0000000 0.0000000 0.0000000 0.0000000 0.0000000 0.0000000 0.0000000 0.0000000 0.0000000 0.0000001 0.0000001 0.0000001

0.8 0.85 0.9 0.95 1 1.05 1.1 1.15 1.2 1.25 1.3 1.35 1.4 1.45 1.5

0.7626 0.8102 0.8579 0.9055 0.9532 1.0009 1.0485 1.0962 1.1438 1.1915 1.2392 1.2868 1.3345 1.3821 1.4298

1.316

0.0000491

0.0763 0.0810 0.0858 0.0906 0.0953 0.1001 0.1049 0.1096 0.1144 0.1192 0.1239 0.1287 0.1334 0.1382 0.1430

0.0000055 0.0000059 0.0000063 0.0000067 0.0000070 0.0000072 0.0000074 0.0000075 0.0000076 0.0000077 0.0000078 0.0000079 0.0000080 0.0000082 0.0000083

0.0153 0.0162 0.0172 0.0181 0.0191 0.0200 0.0210 0.0219 0.0229 0.0238 0.0248 0.0257 0.0267 0.0276 0.0286

0.0000001

6.092 6.515 6.877 7.178 7.419 7.608 7.753 7.864 7.957 8.043 8.139 8.255 8.405 8.596

0.016 0.017 0.018 0.019 0.02 0.021 0.022 0.023 0.024 0.025 0.026 0.027 0.028 0.029 0.03

2.483

0.0000525 0.0000548 0.0000579 0.0000616 0.0000644 0.0000669 0.0000705 0.0000739 0.0000764 0.0000794 0.0000830 0.0000859 0.0000885 0.0000920

0.08 0.085 0.09 0.095 0.1 0.105 0.11 0.115 0.12 0.125 0.13 0.135 0.14 0.145 0.15

5.615

1.408 1.469 1.551 1.653 1.727 1.795 1.890 1.980 2.047 2.129 2.225 2.302 2.374 2.465

2.962 3.496 4.088 4.739 5.451 6.226 7.066 7.971 8.944 9.986 11.097 12.277 13.528 14.850

0.0000001 0.0000001 0.0000002 0.0000002 0.0000002 0.0000002 0.0000003 0.0000003 0.0000004 0.0000004 0.0000004 0.0000005 0.0000005 0.0000006

INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO

FUERZA

6

5 Carga (Tn)

4 3 2 1 0 0

0.5

1

1.5

2

2.5

3 3.5 4 Tiempo (seg)

4.5

5

5.5

6

6.5

7

GRÁFICA DESPLAZAMIENTO - TIEMPO 0.0004

Desplazamiento (m)

0.0003 0.0002 0.0001 0 0

0.5

1

1.5

2

2.5

3

3.5

4

-0.0001

-0.0002 -0.0003

Tiempo (seg) PÉSIMO

ÓPTIMO

IDEAL

4.5

5

5.5

6

6.5

7

INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO

I. Datos del sistema (ingresar): m= Δt = ξ= T=

7.623

Tn*s2 / m

Pésimo

0.025 0.005

s s

u(0) = u'(0) =

0 0

0.001

s

Po =

0

Óptimo Ideal 0.05 0.08

II. Datos calculados : K= 46699.155 Wn = 78.270 c= 58.796

Condiciones

s

Tn/m rad/s Tn*s / m

III. Método de la aceleración lineal: β= 1/4 γ= 1/2 IV. Cálculos iniciales:

a1 Pésimo Óptimo Ideal

a2

53490.45 1278.46 1243186.99 6157.14 30609303.73 30550.51

Umax pésimo Umáx óptimo Umáx ideal

0.0000679 m 0.0000679 m 0.0000679 m

a3 7.623 7.623 7.623

100189.604 1289886.150 30656002.890

INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO

PÉSIMO

ÓPTIMO Desplazamiento

IDEAL Desplazamiento

Desplazamiento

0 0.025 0.05 0.075 0.1 0.125 0.15 0.175 0.2 0.225 0.25 0.275 0.3 0.325 0.35 0.375

0 0.0159 0.0317 0.0476 0.0635 0.0793 0.0952 0.1111 0.1269 0.1428 0.1587 0.1745 0.1904 0.2063 0.2221 0.2380

0 0.016 0.064 0.115 0.137 0.155 0.200 0.248 0.274 0.294 0.335 0.382 0.410 0.432 0.471 0.516

0 0.0000002 0.0000006 0.0000012 0.0000014 0.0000015 0.0000020 0.0000025 0.0000027 0.0000029 0.0000033 0.0000038 0.0000041 0.0000043 0.0000047 0.0000052

0 0.005 0.01 0.015 0.02 0.025 0.03 0.035 0.04 0.045 0.05 0.055 0.06 0.065 0.07 0.075

0 0.0032 0.0063 0.0095 0.0127 0.0159 0.0190 0.0222 0.0254 0.0286 0.0317 0.0349 0.0381 0.0413 0.0444 0.0476

0 0.003 0.018 0.056 0.122 0.219 0.344 0.491 0.650 0.811 0.963 1.096 1.206 1.290 1.348 1.387

0 0.0000000 0.0000000 0.0000000 0.0000001 0.0000002 0.0000003 0.0000004 0.0000005 0.0000006 0.0000007 0.0000009 0.0000009 0.0000010 0.0000010 0.0000011

0 0.001 0.002 0.003 0.004 0.005 0.006 0.007 0.008 0.009 0.01 0.011 0.012 0.013 0.014 0.015

0 0.00063 0.00127 0.00190 0.00254 0.00317 0.00381 0.00444 0.00508 0.00571 0.00635 0.00698 0.00762 0.00825 0.00888 0.00952

0 0.001 0.004 0.012 0.028 0.053 0.091 0.143 0.212 0.299 0.406 0.536 0.689 0.867 1.072 1.304

0 0.0000000 0.0000000 0.0000000 0.0000000 0.0000000 0.0000000 0.0000000 0.0000000 0.0000000 0.0000000 0.0000000 0.0000000 0.0000000 0.0000000 0.0000000

0.4 0.425 0.45 0.475 0.5 0.525 0.55 0.575

0.2538 0.2697 0.2856 0.3014 0.3173 0.3332 0.3490 0.3649

0.546

0.0000055

0.0000011 0.0000011 0.0000011 0.0000012 0.0000012 0.0000013 0.0000014 0.0000015

0.01015 0.01079 0.01142 0.01206 0.01269 0.01333 0.01396 0.01460

0.0000001

1.438 1.469 1.515 1.580 1.668 1.778 1.906

0.016 0.017 0.018 0.019 0.02 0.021 0.022 0.023

1.564

0.0000057 0.0000061 0.0000065 0.0000068 0.0000071 0.0000074 0.0000078

0.0508 0.0539 0.0571 0.0603 0.0635 0.0666 0.0698 0.0730

1.414

0.570 0.608 0.651 0.682 0.708 0.744 0.786

0.08 0.085 0.09 0.095 0.1 0.105 0.11 0.115

1.854 2.173 2.522 2.901 3.311 3.750 4.220

0.0000001 0.0000001 0.0000001 0.0000001 0.0000001 0.0000001 0.0000001

INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO

FUERZA 3.5 3

Carga (Tn)

2.5 2 1.5 1 0.5 0 0

0.5

1

1.5

2

2.5

3

3.5

Tiempo (seg)

4

4.5

5

5.5

6

6.5

7

INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO

GRÁFICA DESPLAZAMIENTO - TIEMPO 0.00008

0.00006

Desplazamiento (m)

0.00004

0.00002

0 0

0.5

1

1.5

2

2.5

3

3.5

4

-0.00002

-0.00004

-0.00006

-0.00008

Tiempo (seg) PÉSIMO

ÓPTIMO

IDEAL

4.5

5

5.5

6

6.5

7

INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO

CÁLCULO DE DESPLAZAMIENTOS

Para hallar los desplazamientos debemos aplicar los métodos de superposición modal (contribución modal): La matriz modal ha quedado así:

Ф=

Modo 1 1 2.03662 2.6477

Modo 2 1 0.53124 -0.89577

Modo 3 1 -1.10474 0.52782

La respuesta esperada corresponde al efecto conjunto de los diferentes modos de vibración empleados:

Respuesta de oscilador de frecuencia w y amortiguamiento ξ ante carga externa de excitación

Desplazamiento en un sistema con 3GDL

t

q1

q2

q3

u1

u2

u3

0 0.001 0.002 0.003 0.004 0.005 0.006 0.007 0.008 0.009 0.01 0.011 0.012 0.013 0.014 0.015 0.016 0.017 0.018 0.019 0.02 0.021 0.022

0.000E+00 5.920E-11 3.551E-10 1.124E-09 2.602E-09 5.023E-09 8.623E-09 1.364E-08 2.029E-08 2.883E-08 3.947E-08 5.246E-08 6.801E-08 8.636E-08 1.077E-07 1.324E-07 1.605E-07 1.922E-07 2.280E-07 2.678E-07 3.120E-07 3.608E-07 4.144E-07

0.000E+00 3.793E-11 2.273E-10 7.186E-10 1.661E-09 3.201E-09 5.484E-09 8.653E-09 1.285E-08 1.820E-08 2.485E-08 3.292E-08 4.254E-08 5.382E-08 6.689E-08 8.185E-08 9.881E-08 1.179E-07 1.391E-07 1.627E-07 1.886E-07 2.169E-07 2.477E-07

0.000E+00 2.070E-11 1.239E-10 3.912E-10 9.025E-10 1.736E-09 2.966E-09 4.665E-09 6.903E-09 9.744E-09 1.325E-08 1.747E-08 2.247E-08 2.829E-08 3.496E-08 4.253E-08 5.103E-08 6.047E-08 7.088E-08 8.227E-08 9.465E-08 1.080E-07 1.223E-07

0.000E+00 1.178E-10 7.063E-10 2.234E-09 5.165E-09 9.960E-09 1.707E-08 2.695E-08 4.004E-08 5.677E-08 7.757E-08 1.029E-07 1.330E-07 1.685E-07 2.096E-07 2.567E-07 3.103E-07 3.706E-07 4.380E-07 5.127E-07 5.952E-07 6.857E-07 7.845E-07

0.000E+00 1.178E-10 7.070E-10 2.239E-09 5.184E-09 1.001E-08 1.720E-08 2.721E-08 4.053E-08 5.762E-08 7.896E-08 1.050E-07 1.363E-07 1.732E-07 2.163E-07 2.661E-07 3.229E-07 3.873E-07 4.599E-07 5.410E-07 6.311E-07 7.307E-07 8.404E-07

0.000E+00 1.337E-10 8.019E-10 2.539E-09 5.877E-09 1.135E-08 1.948E-08 3.081E-08 4.587E-08 6.517E-08 8.925E-08 1.186E-07 1.538E-07 1.954E-07 2.438E-07 2.996E-07 3.632E-07 4.353E-07 5.164E-07 6.068E-07 7.072E-07 8.181E-07 9.399E-07

INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO

0.023 0.024 0.025 0.026 0.027 0.028 0.029 0.03 0.031 0.032 0.033 0.034 0.035 0.036 0.037 0.038 0.039 0.04 0.041 0.042 0.043 0.044 0.045 0.046 0.047 0.048 0.049 0.05 0.051 0.052 0.053 0.054 0.055 0.056 0.057 0.058 0.059 0.06 0.061 0.062 0.063

4.730E-07 5.368E-07 6.060E-07 6.809E-07 7.616E-07 8.484E-07 9.414E-07 1.041E-06 1.147E-06 1.260E-06 1.380E-06 1.507E-06 1.642E-06 1.784E-06 1.934E-06 2.092E-06 2.258E-06 2.433E-06 2.616E-06 2.808E-06 3.008E-06 3.218E-06 3.436E-06 3.665E-06 3.902E-06 4.149E-06 4.406E-06 4.673E-06 4.951E-06 5.238E-06 5.536E-06 5.844E-06 6.163E-06 6.492E-06 6.833E-06 7.185E-06 7.547E-06 7.921E-06 8.307E-06 8.704E-06 9.112E-06

2.811E-07 3.172E-07 3.559E-07 3.973E-07 4.415E-07 4.885E-07 5.383E-07 5.909E-07 6.463E-07 7.046E-07 7.657E-07 8.296E-07 8.963E-07 9.657E-07 1.038E-06 1.113E-06 1.190E-06 1.270E-06 1.353E-06 1.438E-06 1.525E-06 1.615E-06 1.707E-06 1.801E-06 1.898E-06 1.996E-06 2.096E-06 2.198E-06 2.301E-06 2.406E-06 2.512E-06 2.620E-06 2.729E-06 2.839E-06 2.950E-06 3.061E-06 3.174E-06 3.287E-06 3.400E-06 3.513E-06 3.627E-06

1.376E-07 1.539E-07 1.711E-07 1.891E-07 2.081E-07 2.278E-07 2.484E-07 2.696E-07 2.916E-07 3.141E-07 3.373E-07 3.609E-07 3.850E-07 4.094E-07 4.341E-07 4.591E-07 4.842E-07 5.094E-07 5.346E-07 5.598E-07 5.848E-07 6.097E-07 6.342E-07 6.585E-07 6.824E-07 7.058E-07 7.287E-07 7.510E-07 7.728E-07 7.939E-07 8.143E-07 8.339E-07 8.528E-07 8.709E-07 8.883E-07 9.047E-07 9.204E-07 9.352E-07 9.492E-07 9.623E-07 9.746E-07

8.918E-07 1.008E-06 1.133E-06 1.267E-06 1.411E-06 1.565E-06 1.728E-06 1.901E-06 2.085E-06 2.279E-06 2.483E-06 2.698E-06 2.923E-06 3.159E-06 3.406E-06 3.664E-06 3.933E-06 4.213E-06 4.503E-06 4.805E-06 5.118E-06 5.443E-06 5.778E-06 6.124E-06 6.482E-06 6.851E-06 7.231E-06 7.622E-06 8.024E-06 8.438E-06 8.862E-06 9.298E-06 9.745E-06 1.020E-05 1.067E-05 1.115E-05 1.164E-05 1.214E-05 1.266E-05 1.318E-05 1.371E-05

9.606E-07 1.092E-06 1.234E-06 1.389E-06 1.556E-06 1.736E-06 1.929E-06 2.136E-06 2.357E-06 2.593E-06 2.844E-06 3.111E-06 3.395E-06 3.694E-06 4.011E-06 4.345E-06 4.697E-06 5.067E-06 5.456E-06 5.863E-06 6.291E-06 6.738E-06 7.205E-06 7.693E-06 8.201E-06 8.731E-06 9.283E-06 9.856E-06 1.045E-05 1.107E-05 1.171E-05 1.237E-05 1.306E-05 1.377E-05 1.450E-05 1.526E-05 1.604E-05 1.685E-05 1.768E-05 1.853E-05 1.941E-05

1.073E-06 1.218E-06 1.376E-06 1.547E-06 1.731E-06 1.929E-06 2.141E-06 2.369E-06 2.612E-06 2.870E-06 3.146E-06 3.438E-06 3.747E-06 4.075E-06 4.420E-06 4.785E-06 5.169E-06 5.572E-06 5.996E-06 6.441E-06 6.907E-06 7.394E-06 7.904E-06 8.436E-06 8.992E-06 9.571E-06 1.017E-05 1.080E-05 1.145E-05 1.213E-05 1.284E-05 1.357E-05 1.432E-05 1.511E-05 1.592E-05 1.676E-05 1.763E-05 1.852E-05 1.945E-05 2.041E-05 2.139E-05

INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO u1 máx = u2 máx = u3 máx = u1 min = u2 min = u3 min =

0.00463536 0.00876592 0.01104307 -0.00385519 -0.00750325 -0.00948739

m m m m m m

Los máximos desplazamientos se dan en: t = 5.00seg Los mínimoos desplazamientos se dan en: t = 5.186 seg

HISTORIA DEL DESPLAZAMIENTO U1 (m) Desplazamiento (m)

6.000E-03 4.000E-03 2.000E-03 0.000E+00 -2.000E-03

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

5.5

6

6.5

7

-4.000E-03 -6.000E-03

Tiempo (seg)

HISTORIA DEL DESPLAZAMIENTO U2 (m) Desplazamiento (m)

1.000E-02 5.000E-03 0.000E+00 0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

5.5

6

6.5

7

6

6.5

7

-5.000E-03 -1.000E-02

Tiempo (seg)

HISTORIA DEL DESPLAZAMIENTO U3 (m) Desplazamiento (m)

1.500E-02 1.000E-02 5.000E-03 0.000E+00 -5.000E-03

0

0.5

1

1.5

2

2.5

3

3.5

4

-1.000E-02 -1.500E-02

Tiempo (seg)

4.5

5

5.5

INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO CÁLCULO DE FUERZAS ESTÁTICAS EQUIVALENTES, CORTANTE BASAL Y MOMENTO BASAL Las fuerzas estáticas equivalentes asociadas con la respuesta del n-ésimo modo, están definidas por la ecuación:

La matriz modal quedó así: Modo 1 1 Ф= 2.03662 2.6477

Modo 2 1 0.53124 -0.89577

Modo 3 1 -1.10474 0.52782

La matriz de masa quedó así: 3.088 M= 0.000 0.000

0.000 3.058 0.000

0.000 0.000 2.882

Las frecuencias naturales son: w1 = w2 = w3 =

16.44 48.84 76.15

rad/seg rad/seg rad/seg

T n.seg2/m

h1 = h2 = h3 =

3 5.8 8.6

m m m

INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO Respuesta de oscilador de frecuencia w y amortiguamiento ξ ante carga externa de excitación

Fuerzas elásticas equivalentes para cada instante de tiempo

t

q1

q2

q3

f1

f2

f3

Cortante Basal Total V = ∑f

0 0.001 0.002 0.003 0.004 0.005 0.006 0.007 0.008 0.009 0.01 0.011 0.012 0.013 0.014 0.015 0.016 0.017 0.018 0.019 0.02 0.021 0.022

0 5.9197E-11 3.5507E-10 1.1239E-09 2.6015E-09 5.0231E-09 8.6233E-09 1.3636E-08 2.0294E-08 2.8829E-08 3.9474E-08 5.2458E-08 6.801E-08 8.6359E-08 1.0773E-07 1.3235E-07 1.6045E-07 1.9225E-07 2.2796E-07 2.6781E-07 3.1203E-07 3.6081E-07 4.1439E-07

0 3.7929E-11 2.2729E-10 7.1858E-10 1.6608E-09 3.2011E-09 5.4843E-09 8.653E-09 1.2846E-08 1.8201E-08 2.4849E-08 3.292E-08 4.2538E-08 5.3824E-08 6.6892E-08 8.1854E-08 9.8815E-08 1.1787E-07 1.3913E-07 1.6266E-07 1.8855E-07 2.1689E-07 2.4773E-07

0 2.0701E-11 1.2392E-10 3.9121E-10 9.0248E-10 1.7355E-09 2.9657E-09 4.6651E-09 6.9027E-09 9.7436E-09 1.3249E-08 1.7474E-08 2.2471E-08 2.8287E-08 3.4962E-08 4.2532E-08 5.1027E-08 6.0471E-08 7.0882E-08 8.2271E-08 9.4645E-08 1.08E-07 1.2234E-07

0 6.9938E-07 4.189E-06 1.3234E-05 3.056E-05 5.884E-05 0.00010068 0.00015863 0.00023513 0.00033255 0.00045315 0.00059908 0.00077236 0.00097492 0.00120851 0.00147479 0.00177524 0.00211123 0.00248394 0.00289443 0.00334358 0.00383215 0.0043607

0 -1.5892E-07 -9.4924E-07 -2.9875E-06 -6.8649E-06 -1.314E-05 -2.2331E-05 -3.4907E-05 -5.1286E-05 -7.1822E-05 -9.6804E-05 -0.00012645 -0.0001609 -0.00020021 -0.00024436 -0.00029324 -0.00034664 -0.00040428 -0.00046575 -0.0005306 -0.00059824 -0.00066801 -0.00073916

0 7.1093E-08 4.2555E-07 1.3432E-06 3.0975E-06 5.954E-06 1.0168E-05 1.5981E-05 2.3624E-05 3.3309E-05 4.5233E-05 5.9575E-05 7.6496E-05 9.6133E-05 0.00011861 0.00014402 0.00017244 0.00020393 0.00023854 0.00027626 0.0003171 0.00036105 0.00040805

0 0.0000006 0.0000037 0.0000116 0.0000268 0.0000517 0.0000885 0.0001397 0.0002075 0.0002940 0.0004016 0.0005322 0.0006880 0.0008708 0.0010828 0.0013256 0.0016010 0.0019109 0.0022567 0.0026401 0.0030625 0.0035252 0.0040296

Momentos en la base para cada instante de tiempo M1

M2

M3

Momento Basal Total M = ∑M

0 2.0981E-06 1.2567E-05 3.9703E-05 9.1681E-05 0.00017652 0.00030205 0.00047589 0.0007054 0.00099766 0.00135945 0.00179723 0.00231709 0.00292475 0.00362553 0.00442436 0.00532573 0.00633368 0.00745182 0.00868328 0.01003075 0.01149645 0.01308211

0 -9.2175E-07 -5.5056E-06 -1.7327E-05 -3.9816E-05 -7.6212E-05 -0.00012952 -0.00020246 -0.00029746 -0.00041657 -0.00056147 -0.00073341 -0.00093322 -0.00116123 -0.00141731 -0.0017008 -0.00201053 -0.0023448 -0.00270137 -0.00307746 -0.00346977 -0.00387444 -0.00428712

0 6.114E-07 3.6597E-06 1.1551E-05 2.6639E-05 5.1204E-05 8.7441E-05 0.00013744 0.00020316 0.00028645 0.000389 0.00051235 0.00065786 0.00082675 0.00102003 0.00123855 0.001483 0.00175384 0.0020514 0.00237582 0.00272708 0.003105 0.00350925

0 0.0000018 0.0000107 0.0000339 0.0000785 0.0001515 0.0002600 0.0004109 0.0006111 0.0008675 0.0011870 0.0015762 0.0020417 0.0025903 0.0032283 0.0039621 0.0047982 0.0057427 0.0068019 0.0079816 0.0092881 0.0107270 0.0123042

INGENIERÍA ANTISÍSMICA ING. IVÁN LEÓN MALO

La cortante basal máxima es de 22.451 Tn y se da en el tiempo: t = 5.00 seg La cortante basal mínima es de -18.481 Tn y se da en el tiempo: t = 5.186 seg El momento basal máximo es de 130.299 Tn.m y se da en el tiempo: t = 5.00 seg El momento basal mínimo es de -111.195 Tn.m y se da en el tiempo: t = 5.186 seg

HISTORIA DE CORTANTE EN LA BASE 25 20

Cortante basal (Tn)

15 10 5 0

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

5.5

6

6.5

7

6

6.5

7

-5 -10 -15 -20

Tiempo (seg)

HISTORIA DE MOMENTO EN LA BASE 150

Momento basal (Tn.m)

100 50 0 0

0.5

1

1.5

2

2.5

3

3.5

4

-50 -100 -150

Tiempo (seg)

4.5

5

5.5

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