8/10/2019 Analysis on pore pressure in an anisotropic seabed in the vicinity of a caisson.pdf

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8/10/2019 Analysis on pore pressure in an anisotropic seabed in the vicinity of a caisson.pdf

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Free surface

d

h

z

x

SWL

Rigid impermeable bottom

NX L B1

B B1

L

B2

B2

H1

Caisson

Porous SeabedRubble Mound Base

section

1 2 3 4 5 6

x (m)

y(m)

A

A

B

B

L= the wavelength

100 150 200 2500

25

50

75

100

125

150

x (m)

z

(m)

x (m)

z

(m)

(a) Principle of repeatability (b) finite element mesh

8/10/2019 Analysis on pore pressure in an anisotropic seabed in the vicinity of a caisson.pdf

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00.1

0.3

0.5

0.7

0.050

0.05

-0.1

-0.3

-0.5-0.7-0.9

100 150 200 2500

25

50

75

100

125

150

x (m)

z(m)

Incident waves

8/10/2019 Analysis on pore pressure in an anisotropic seabed in the vicinity of a caisson.pdf

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-1 -0.75 -0.5 -0.25 0 0.25 0.5 0.75 10

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

1.1

z/h

p / po

2

345section 1

-1 -0.75 -0.5 -0.25 0 0.25 0.5 0.75 10

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

1.1

section 1

z/h

p / po

2

34

5

(a) Coarse sand (b) fine sand

-0.4 -0.2 0 0.2 0.4 0.6 0.8 10

0.2

0.4

0.6

0.8

1

xx=0.2

xx=0.3

xx

=0.35

xx

=0.4

xx

=0.45

p/po

z

/h

Section 2

-0.2 0 0.2 0.4 0.6 0.8 1 1.20

0.2

0.4

0.6

0.8

1

xx=0.2

xx=0.3

xx

=0.35

xx

=0.4

xx

=0.45

p/po

z/h

Section 3

-0.2 0 0.20

0.2

0.4

0.6

0.8

1

xx

=0.2

xx=0.3

xx

=0.35

xx

=0.4

xx

=0.45

p/po

z/h

Section 4

(a) section 2 (b) section 3

(c) section 4

8/10/2019 Analysis on pore pressure in an anisotropic seabed in the vicinity of a caisson.pdf

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-0.2 0 0.2 0.4 0.6 0.8 10

0.2

0.4

0.6

0.8

1

xz

=0.2

xz

=0.3

xz=0.35

xz=0.4

xz

=0.45

p/po

z/h

Section 2

-0.2 0 0.2 0.4 0.6 0.8 1 1.20

0.2

0.4

0.6

0.8

1

xz

=0.2

xz

=0.3

xz=0.35

xz=0.4

xz

=0.45

p/po

z/h

Section 3

-0.2 0 0.2 0.40

0.2

0.4

0.6

0.8

1

xz

=0.2

xz

=0.3

xz

=0.35

xz

=0.4

xz

=0.45

p/po

z/h

Section 4

(a) section 2 (b) section 3

(c) section 4

8/10/2019 Analysis on pore pressure in an anisotropic seabed in the vicinity of a caisson.pdf

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-0.2 0 0.2 0.4 0.6 0.8 10

0.2

0.4

0.6

0.8

1

n=0.6

n=0.8

n=1.0

p/po

z/h

Section 2

-0.2 0 0.2 0.4 0.6 0.8 1 1.20

0.2

0.4

0.6

0.8

1

n=0.6

n=0.8

n=1.0

p/po

z/h

Section 3

-0.2 0 0.2 0.4 0.60

0.2

0.4

0.6

0.8

1

n=0.6

n=0.8n=1.0

p/po

z/h

Section 4

(a) section 2 (b) section 3

(c) section 4

8/10/2019 Analysis on pore pressure in an anisotropic seabed in the vicinity of a caisson.pdf

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-0.2 0 0.2 0.40

0.2

0.4

0.6

0.8

1

m=0.4

m=0.6

m=0.8

m=1.0

m=1.2

p/po

z/h

Section 4

-0.2 0 0.2 0.4 0.6 0.8 10

0.2

0.4

0.6

0.8

1

m=0.4

m=0.6

m=0.8m=1.0

m=1.2

p/po

z/h

Section 2

-0.2 0 0.2 0.4 0.6 0.8 1 1.20

0.2

0.4

0.6

0.8

1

m=0.4

m=0.6

m=0.8m=1.0

m=1.2

p/po

z/h

Section 3

(a) section 2 (b) section 3

(c) section 4

8/10/2019 Analysis on pore pressure in an anisotropic seabed in the vicinity of a caisson.pdf

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0 0.2 0.4 0.6 0.8 10

0.2

0.4

0.6

0.8

1

p/po

z/h

T=7.5 sec

10 12.5

15

17.5

Section 2

0 0.2 0.4 0.6 0.8 10

0.2

0.4

0.6

0.8

1

p/po

z/h

T=7.5 sec

1012.5

15

17.5

Section 3

-0.1 0 0.1 0.2 0.3 0.4 0.50

0.2

0.4

0.6

0.8

1

p/po

z/h

T=7.5 sec

10 12.5

1517.5

Section 4

(a) section 2 (b) section 3

(c) section 4

8/10/2019 Analysis on pore pressure in an anisotropic seabed in the vicinity of a caisson.pdf

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0 0.2 0.4 0.6 0.8 10

0.2

0.4

0.6

0.8

1

d=10 m

d=15 m

d=20 md=25 m

d=30 m

p/po

z/h

Section 2

0 0.2 0.4 0.6 0.8 10

0.2

0.4

0.6

0.8

1

d=10 m

d=15 m

d=20 md=25 m

d=30 m

p/po

z/h

Section 3

-0.1 0 0.1 0.2 0.3 0.4 0.5 0.60

0.2

0.4

0.6

0.8

1

d=10 m

d=15 m

d=20 m

d=25 m

d=30 m

p/po

z/h

Section 4

(a) section 2 (b) section 3

(c) section 4

8/10/2019 Analysis on pore pressure in an anisotropic seabed in the vicinity of a caisson.pdf

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-0.2 0 0.2 0.4 0.6 0.8 10

0.2

0.4

0.6

0.8

1

d=10 m

d=15 m

d=20 md=25 m

d=30 m

p/po

z/h

Section 2

-0.2 0 0.2 0.4 0.6 0.8 10

0.2

0.4

0.6

0.8

1

d=10 m

d=15 m

d=20 md=25 m

d=30 m

p/po

z/h

Section 3

-0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 0.60

0.2

0.4

0.6

0.8

1

d=10 m

d=15 m

d=20 m

d=25 m

d=30 m

p/po

z/h

Section 4

(a) section 2 (b) section 3

(c) section 4

8/10/2019 Analysis on pore pressure in an anisotropic seabed in the vicinity of a caisson.pdf

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-0.2 0 0.2 0.4 0.6 0.8 10

0.2

0.4

0.6

0.8

1

B=2 m

B=4 m

B=6 mB=8 m

p/po

z/h

Section 2

-0.2 0 0.2 0.4 0.6 0.8 1 1.20

0.2

0.4

0.6

0.8

1

B=2 m

B=4 m

B=6 mB=8 m

p/po

z/h

Section 3

-0.2 0 0.2 0.40

0.2

0.4

0.6

0.8

1

B=2 m

B=4 m

B=6 mB=8 m

p/po

z/h

Section 4

(a) section 2 (b) section 3

(c) section 4

8/10/2019 Analysis on pore pressure in an anisotropic seabed in the vicinity of a caisson.pdf

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0 0.2 0.4 0.6 0.8 10

0.2

0.4

0.6

0.8

1

B1=5 m

B1=10 m

B1=15 mB1=20 m

p/po

z/h

Section 2

0 0.2 0.4 0.6 0.8 10

0.2

0.4

0.6

0.8

1

B1=5 m

B1=10 m

B1=15 mB1=20 m

p/po

z/h

Section 3

0 0.2 0.4 0.60

0.2

0.4

0.6

0.8

1

B1=5 m

B1=10 m

B1=15 m

B1=20 m

p/po

z/h

Section 4

(a) section 2 (b) section 3

(c) section 4

8/10/2019 Analysis on pore pressure in an anisotropic seabed in the vicinity of a caisson.pdf

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0 0.2 0.4 0.6 0.8 10

0.2

0.4

0.6

0.8

1

H1=1 m

H1=3 m

H1=5 m

p/po

z/h

Section 2

0 0.2 0.4 0.6 0.8 1 1.20

0.2

0.4

0.6

0.8

1

1.2

H1=1 mH

1=3 m

H1=5 m

p/po

z/h

Section 3

0 0.2 0.4 0.60

0.2

0.4

0.6

0.8

1

1.2

H1=1 m

H1=3 m

H1=5 m

p/po

z/h

Section 4

(a) section 2 (b) section 3

(c) section 4