Leg Support Design

SUVIDYA SUVIDYA INSTITUTE OF TECHNOLOGY Mumbai : 400055

REFE REFERE RENC NCE E

Pres Pressu sure re Vesse essell Des Desig ign n Man Manua uall by Denn Dennis is R M!ss M!ss

VESSEL DIMENSIONS H

Height of vessel

162 in

L

Distance fom !ase to "# of $essel

%0 in

ls

&nsu''ote( length of Leg su''ot

27 )n

D

*hell outsi(e Diamete

60 in

(s

Leg su''ot !ase cicle (iamete

t

"oo(e( shell thic,ness

-

O'eating -eight of vessel

-e

/m't eight of vessel

60+5 in 0+5 in 1.565 lb 5000 lb

1 OF 7

SUVIDYA INSTITUTE OF TECHNOLOGY Mumbai : 400055

REFERENCE

PRESSURE VESSEL DESIGN MANUAL "Y DRMOSS # PROCEDURE # $%

&IND LOAD AND MOMENT CALCULATION De

Diamete of $essel inclu(ing insulation if an

5 Feet

Le

/ffective Height suecte( to -in( effect

12 Feet

L

Distance fom !ase to "# of $essel

%0 in

$b

!asic -in( *'ee( 3 *ite 3 Mumbai  ''en(i 3  3 )* .75 3)))

44 m8sec

91

obabilit facto ;is, coefficient3 *ee 5+<+1 3 )*3.753)))

92

=eain Height an( *tuctue *i>e *ee 5+<+2 3 )*3.753)))

0+%1 1

"atego 3 2 an( "lass  9<

=o'oga'h Facto

$>

Design -in( *'ee(

$>

? $b  91  92  9<

>

-in( essue

>

? 0+6  $>

2

>

1

40+04 m8sec

%61+%20%6 @8m2 20+20 lb8feet2

$

*hea Foce

$

? >  De  Le

Mb

Ovetuning -in( Moment

Mb

$ L

1212+02 lb

10%0.1+. lb+ in

2 OF 7

SUVIDYA INSTITUTE OF TECHNOLOGY Mumbai : 400055

REFERENCE

PRESSURE VESSEL DESIGN MANUAL "Y DRMOSS # PROCEDURE # $$

SEISMIC DESIGN # VESSEL ON UN"RACED LEGS DETAILS OF SELECTED LEG SUPPORTS

n

@O+ OF *&O;=* *)A/ OF *&O;=

 

4 @os )*M! 175

*/"=)O@L ;/

<+.75 in2

  )

L/*= ;D)&* OF #C;=)O@ 3  

0+6%< in

MOM/@= OF )@/;=) !O&= B3B)*

<0+272 in4

)

MOM/@= OF )@/;=) !O&= C3B)*

1+.4< in4

)>

 ) + "os2q E )  *in2 q

16+061 in4

)

 ) + *in2q E )  "os2 q

16+05< in4

S)1

*&MM=)O@ OF MOM/@= OF )@/;=) OF LL L/#* /;/@D)"&L; =O Fh

12.+46 in4

S)2

*&MM=)O@ OF MOM/@= OF )@/;=) OF O@/ L/#

<2+11 in4

 91

/@D "O@@/"=)O@ "O3/FF)")/@=

ls

Fa

&@*&O;=/D L/@#=H OF L/# *&O;=  LLO-!L/ B)L *=;/** OF L/# M=/;)L ''en(i3 L

/

MOD&L&* OF /L=)")=C

-

-/)#H= OF $/**/L

g

""/L/;=)O@ D&/ =O #;$)=C

2 27 )n 14000 *) <0000000 *) 1.565 lb <.6 in8*ec2

FIND OUT DEFLECTION ' ( y ) 

2 + -+ ls< 8  <+n+/+ S)2 Li*i+ !, De,le-+i!n is . in-/ 0er %11 F+

CHEC2 # %

0+06< in

0+1<50 in

A"OVE LIMIT IS SATISFIED

FIND OUT PERIOD OF VI"RATION ' ( T ) =

2 + 'i +  8 g  0+5

FIND OUT "ASE SHEAR ' ( V ) *)=/

M&M!) )@D)

AO@/

)))

0+0.04 sec (As 0er 0r!-e3ure gi4en in IS5%67$#8118)

A

AO@/ F"=O;

)

)MO;=@"/ F"=O; =able 3 6 3 )*:1.%<32002

1

;

;/*O@*/ ;/D&"=)O@ F"=O; =able 3 7 3 )*:1.%<32002

4

*a8g

$/;#/ ;/*O@*/ ""/L/;=)O@ "O3/FF)")/@=

0+16

2+5

"l+ 6+4+5 3 )*:1.%< 3 2002 *oil 3 Me(ium soil sites

 h

D/*)#@ HO;)AO@=L ""/L/;=)O@ */"=;&M

 h

A  ) 8 2 ;   *a8g

0+050

< OF 7

SUVIDYA INSTITUTE OF TECHNOLOGY Mumbai : 400055

REFERENCE

PRESSURE VESSEL DESIGN MANUAL "Y DRMOSS # PROCEDURE # $$

SEISMIC DESIGN # VESSEL ON UN"RACED LEG FIND OUT "ASE SHEAR ' ( V )

(As 0er 0r!-e3ure gi4en in IS5%67$#8118) ###### C!n+99

-

O/;=)@# -/)#H=

$

D/*)#@ */)*M)" !*/ *H/;

$

h  -

1.565+00 lb

%2.+25 lb

HORI:ONTAL FORCE AT THE TOP OF THE VESSEL ' (F+) Ft

Lesse of folloing

0+00 lb

Ft ? 0+07+ =+$ o Ft ? 0+25$ Ft ? 0

if

=  0+7 *ec

HORI:ONTAL FORCE AT THE CG OF THE VESSEL ' (F/) Fh

Fh ? $ 3 Ft

o

Fh ? h + -

%2.+25 lb

VERTICAL FORCE AT CG OF VESSEL' (F4) Fv

3-

Fv

@ot ''licable

Dona( foce

31.565+00 lb

u'a( foce

0+00 lb

OVERTURNING MOMENT AT THE "ASE ' (Mb;) MbG

L + Fh E H + Ft

.<542+50 lb+in

OVERTURNING MOMENT AT "OTTOM TANGENT LINE ' (M+;) Mt

 L 3 ls  Fh E  H 3 Ls Ft

5.47%+75 lb+in

CHEC2 8 Mb

O$/;=&;@)@# MOM/@= D&/ =O -)@D /FF/"=

MbG

O$/;=&;@)@# MOM/@= D&/ =O */)*M)" /FF/"=

Mb

GOVERNING OVERTURNING MOMENT GREATER OF A"OVE

10%0.1+.4 lb+in .<542+50 lb+in %1716%6< lb+in

USE THIS OVERTURNIG MOMENT FOR FURTHER CALCULATION

MA=IMUM ECCENTRIC LOAD' (,%) f1  45 o

3 Fv 8 n E 4 + Mt 8 n + D 

32.2<+21%<.6 lb

f1  1<5

o

3 Fv 8 n 3 4 + Mt 8 n + D 

3645%+2.0614 lb

f1  225

o

3 Fv 8 n 3 4 + Mt 8 n + D 

3645%+2.0614 lb

f1  <15

o

3 Fv 8 n E 4 + Mt 8 n + D 

32.2<+21%<.6 lb

HORI:ONTAL LOAD DISTRI"UTION ON LEGS ' Vn V

#ovening Foce acting at the "ente (ue to -in(

1212+02 lb

$ + )E)> 8 S)1

<0<+01 lb

$n  1<5

o

$ + )E)> 8 S)1

<0<+01 lb

$n  225

o

$ + )E)> 8 S)1

<0<+01 lb

$n  <15

o

$ + )E)> 8 S)1

<0<+01 lb

$n  45

o

VERTICAL LOAD DISTRI"UTION ON LEGS ' Fn L!a3ing Case un3er -!nsi3era+i!n F(

 3 Fv 8 n

(1

"ase 2 34641+25 lb 46+66 in

FL

Mb  8 2+ (1

116.+.5 lb

F( E FL +"os 45

3<.14+6< lb

Fn  1<5

o

F( E FL +"os 1<5

35467+<. lb

Fn  225

o

F( E FL +"os 225

3546.+<6 lb

Fn  <15

o

F( E FL +"os <15

3<.15+61 lb

Fn  45

o

4 OF 7

SUVIDYA INSTITUTE OF TECHNOLOGY Mumbai : 400055

REFERENCE

PRESSURE VESSEL DESIGN MANUAL "Y DRMOSS # PROCEDURE # $$

SEISMIC DESIGN # VESSEL ON UN"RACED LEG "ENDING MOMENT IN LEGS ' ( M ) bIe

Distance fom folloing s,etch

a

<+00 in 1+50 in

f1 45o  e E $ 45o  l

M  45o

32..+52 lb+in

o

f1 1<5   e 3 $ 1<5   l

32755.+%. lb+in

M  225o

f1 225o  e 3 $ 225o  l

32755.+%. lb+in

M  <15o

f1 <15o  e E $ <15o  l

32..+52 lb+in

M  1<5

o

o

A=IAL STRESS INDUCED IN LEGS ' (,a) fa  450

?  Fn  45o  8 ?  Fn  1<5  8

31410+%< *)

fa  2250

?  Fn  225o  8

31411+1% *)

fa  1<5

fa  <15

0

o

3%.4+42 *)

0

o

?  Fn <15  8

3%.4+67 *)

"ENDING STRESS IN LEGS ' (,b) fb  450

M J b 8 ) *in q Ea 8 ) "os qK

3446+.0 *)

fb  1<50

M J b 8 ) *in q Ea 8 ) "os qK

54547+<. *)

0

M J b 8 ) *in q Ea 8 ) "os qK

4265.+06 *)

fb  <150

M J b 8 ) *in q Ea 8 ) "os qK

3571+50 *)

fb  225

MB)M&M LLO-!L/ *=;/** )@ =/@*)O@ MB)M&M LLO-!L/ *=;/** )@ "OM;/**)O@

1<6.0 *) 314000 *)

COM"INED STRESS ANALYSIS fa 8 Fa  0+15 HENCE fa 8 Fa E fb 8 Fb  1

C!n3i+i!n is sa+i,ie3

CONCLUSION ALL A"OVE STRESS ARE &ELL &ITHIN LIMIT AND COM"INE STRESS LIMIT IS ALSO SATISFIED HENCE SELECTED LEG MEM"ER SI:E IS ADE>UATE

5 OF 7

SUVIDYA INSTITUTE OF TECHNOLOGY Mumbai : 400055

REFERENCE

PRESSURE VESSEL DESIGN MANUAL "Y DRMOSS # PROCEDURE # $$

DESIGN CHEC2 FOR COMPRESSIVE STRESS INDUCED IN VESSEL SHELL

?

-)D=H OF !/M FL@#/

<+%4 in

/

H/)#H= OF L/# -/LD/D O@ *H/LL

%+.4 in

R

O&=*)D/ ;D)&* OF $/**/L

+

$/**/L *H/LL =H)"9@/**

(R+) 1@

<0 in 0+50 in <+.7

L%

 E 2h

fc

"om'essive stess above leg

2<+62 in

546+.% *)

f18  L1+t  fc

"om'essive stess (ue to combine( Loa(ing  3  Fv 8 'i +D+t 3 4+ Mt 8'i+D 2+t 

F"

32<.+<% *)

MB)M&M LLO-!L/ "OM;/**)$/ *=;/** )* F"=O;3! F;OM *M/ "OD/

Fa-+!r A

1%8@ +  R

0+0020.

Fa-+!r "

FO; ** <04 at mbient tem'eatue

%%6111 *)

CONCLUSION INDUCED COMPRESSIVE STRESS IN SHELL IS &ITHIN ALLO&A"LE LIMIT HANCE PROVIDED SHELL THIC2NESS IS ADE>UATE SI:ING OF ANCHOR "OLTS F3u'lift -

 4 + Mb 8 (  /m't ill give ost con(ition

7212+0 lb 5000 lb

)F F3u'lift  - =H/@ &L)F= O""&;* Hence

&L)F= O""&;*

*t

LLO-!L/ *=;/** OF !OL= M=/;)L

@

@o+ OF !OL=* /; L/#

f3aial

B)L =/@*)O@ LOD

f3aial

Fv 8 n E 4  Mb 8 n ( 

 b

!OL= ;/ ;/&);/D

 b

f3aial 8 *t+ @

!( CONCLUSION

;/&);/D !OL= D)M/=/; 3  b 8 0+7.54  0+5 ;O$)D/ !OL= D)M/=/;

1<100 *) 2+0 @os 1.0<+0 ib 0+06% in2 0+2%6 in %BUNC 8 NOS

PER LEG

6 OF 7

SUVIDYA INSTITUTE OF TECHNOLOGY Mumbai : 400055

REFERENCE

PRESSURE VESSEL DESIGN MANUAL "Y DRMOSS # PROCEDURE # $$ DESIGN OF "ASE PLATE

"

*)D/ OF !*/ L=/

12+00 in

D

*)D/ OF !*/ L=/

12+00 in

GE

*")@# !/=-//@ !OL= HOL/*

6+00 in

3

!/M L/@#=H

7+.7 in

b

!/M FL@#/ -)D=H

<+%4 in

P

 B)L LOD /; L/#

4641+25 lb

,-;

&L=)M=/ 2. DC* *=;/@#=H ;/F+ =!L/ <+<0

2000+00 *)

!OL= *)A/ **&M/D

M20

Ra

;OO= ;/ OF O@/ !OL=

0+<4% in2

Fy

C)/LD *=;/** OF !*/ L=/ M=/;)L

<0000 *)

RE>UIRED AREA OF "ASE PLATE ' (Ar) Ar 

 8 0+7 + fcG

<+<2 in2

* n

D 3 0+%5( 82

2+26 in

"EARING PRESSURE ' (,0) ,0

 8 

1400 *)

THIC2NESS OF "ASE PLATE ' ( + ) +

#eate of m o n  f' 8 0+25 + F0+5

=

;O$)D/D !*/ L=/ =H)"9@/**

0+%. in 1 in

7 OF 7