Métodos Objetivos de Construcción de Secciones

Métodos objetivos de construcción de secciones

Isógonas α

α         0

T 

   T   =           0    t

i      s     o    α   g    o    n   

t 

( a)

α

(b)

(c)

Figur Figure e 14. 14.16 16   Dip isog isogons: ons: (a) cons constructio truction; n; (b) isog isogon on patte pattern; rn; (c) thickne thickness ss var variatio iation. n.

Ragan, 2009

Isógonas

  Table 14.5  Fold classes based on isogon angle  φ  for positive  α Fold class 1A 1B parallel 1C 2 similar 3

 

φ φ    φ   > 0 φ α   > φ  α

   

  =

   

  =

 

Left Limb

−90

Right Limb

h

3

−60 α

1C

1A

1B

1B

1A

2

−30

isogon φ

2

φ

0

+30

1C

+60

Left Limb

3

Right Limb

(a)

(b) +90

−90

−60

−30

0

+30

+60

+90

α Ragan, 2009

Figure Fig ure 14.19 14.19   Isogon angle: angle: (a) fold and isogon angle φ ; (b) graph graph of φ vs. α  (after Hudleston, 1973 1973,p.7). ,p.7).

O

D δB

D δA

δA

Busk 

B

A

B

A

δB

C (a)

(b) C

O

O2 A

A

direction.

B

B

Figure 15.5 Figure 15.5 Arcs  Arcs through three adjacent dips: dips: (a) dips in same direction; (b) dips in opposit opposite e

C

C O2 (a)

O1

W

(b)

O1

O1

E

Figure Figure 15.6 15.6 Linked  Linked arcs tangent to four dip lines.

O3

B A

F

E

C

 

D G Ragan, 2009

O2

Busk  Table 15.1   Structural data Station

Dip

Station

A B C

20 E 10 W 45 W

◦

◦

◦

Dip ◦

F G H

25 E 75 E 50 E

JI

20 0 E

◦

◦

◦

D E

W

◦

10 0 W ◦

◦

E

O1

O8 M

 

N

P

O2

 c e   r  f  a   u  e  s    n g     H  i

O7

O9

L A A1

B

C

D

E

 

F

G

 

H

 

Q

K

A5 O5

A4 R

A4 A5

J A6

O6

A2 A3

I

A3

O3

A2

A6 S

A1 T

O4

Figure Figu re 15.12   Full reconstruction by tangent arcs showing trace of the hinge surface.

Ragan, 2009