44
ERRA'f.t.\. ---- Page 1- First paragraph, sentence . "lengths artd panel i , to !(?,sd "lengths a panel' n P.ag.e: 2 ... Secof.1d second sentence Chimge; ffcompleted" to I completely" Seem:;d p6:t'sgraph, Last sentence :Omit: "nO',," . Page 3 P'cog:;:sm ps:-t n.o, 3 ctwnge to Function Be finds the zero root of a :lad order: paraboLic equation.by ul.dng NII!'\I1lon's Methoo 'f()':- Find! ng Ze't'o8 o Psge.5 Par:t U.-I) No. 2b C'hrm.ge; J'exce-ptable" to I P1I 4 le 6 Var:b.b1e QIC C'h:cnge; to "ltFJr8{:io:rl" Page 3- part no o 3 to :read; Function '\I'At. which (:omp.v.:tes' a valne using 8 ....._--_...-----_.. __._ ...----...--_.._. __.,.__.... ...- Po 9 of 1.3 0.5 * Q it C2) e12 :lr C3) 0,125 * ex * eIfe2 " x(12) - C2 * (C13 + = C3 *' (C14/REL + '* I ! Shou.l'd reed i I 1 i , '* (C3 .• (;.R '* CS) .'K(17) + C12 x (18) "'" elf •. f' ell 't:' (''R * CS x(12) = x(ll) (C2 * eel3 - 0 0 5• Q e2) + C3 * (Cl4 - 0.5 * C12 * (3»!REL AL(K) '"" AL(K - Z) w <05 'ii," Cl el/el I I, , I I :;-r,(l8) "" CJ.4 + e12 Iii: cn. ilE".£. CS I I .AL(l() '" AL(K :'" 2} " l . _.-'-----_.-. .,.---_._-_. __ _ ..__ __ _. __.._-:. .._ __._-----_ _-_. __._------------

sentence P.ag.e: 2 Secof.1d to - Lehigh Universitydigital.lib.lehigh.edu/fritz/pdf/248_16.pdf · 248.16-2 that the ratio of the stiffener spacing to the plate thickness (bit) be sufficiently

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Page 1: sentence P.ag.e: 2 Secof.1d to - Lehigh Universitydigital.lib.lehigh.edu/fritz/pdf/248_16.pdf · 248.16-2 that the ratio of the stiffener spacing to the plate thickness (bit) be sufficiently

ERRA'f.t.\.----Page 1 - First paragraph, 18~t sentence

. ClW,~g€; "lengths artd panel i, to !(?,sd "lengths a panel' n

P.ag.e: 2 ... Secof.1d p~ragraph~ second sentenceChimge; ffcompleted" to I completely"

Seem:;d p6:t'sgraph, Last sentence:Omit: "nO',," .

Page 3 ~ P'cog:;:sm ps:-t n.o, 3ctwnge to ~EGd; Function Be ~hich finds the zero root of a:lad order: paraboLic equation.by ul.dng NII!'\I1lon's Methoo 'f()':­Find! ng Ze't'o8 o

Psge.5 Par:t U.-I) No. 2bC'hrm.ge; J'exce-ptable" to I eccl:~pt:C:lb1.l:.~"

P1I4le 6 ~ Var:b.b1e QICC'h:cnge; "j.ntet·~tiotli' to "ltFJr8{:io:rl"

Page 3 - ProgT~m part no o 3~;'hif.lng;e to :read; Function '\I'At. which (:omp.v.:tes' a valneusing 8 pa~abolic equ~tion<o

.~.~-~_....._--_...-----_..__._ ...----...--_.._.__.,.__....-"·-·--·---"-~r----"'-'-"·-·--·--"-_··_·-""---------""--~"'----'" --..,. ...-Po 9 of 1.3

0.5 * Q it C2)e12 :lr C3)

0,125 * ex * eIfe2 "

x(12) ~ ~(11) - C2 * (C13 += C3 *' (C14/REL + ,~.5 '*

I! Shou.l'd reed

iI1

~. ~

i,

'* (C3 .• (;.R '* CS).'K(17) + C12

x (18) "'" elf•.f' ell 't:' (''R * CS

x(12) = x(ll) • (C2 * eel3 - 00 5 • Qe2) + C3 * (Cl4 - 0.5 * C12 *(3»!REL

AL(K) '"" AL(K - Z) w <05 'ii," Cl ..,~ el/el

II,,I

I :;-r,(l8) "" CJ.4 + e12 Iii: cn. ~\' ilE".£. ~~ CS

II .AL(l() '" AL(K :'" 2}

" l ._.-'-----_.-..,.---_._-_.__ _..__ -.~". __ _.__.._-:. _--~_._._._._-~.-._-.._ __._-----_ _-_.__._------------

Page 2: sentence P.ag.e: 2 Secof.1d to - Lehigh Universitydigital.lib.lehigh.edu/fritz/pdf/248_16.pdf · 248.16-2 that the ratio of the stiffener spacing to the plate thickness (bit) be sufficiently

• BUILT-UP MEMBERS IN PLASTIC DESIGN

COMPUTER PROGRAM FOR

ULTIMATE STRENGTH OF

LONGITUDINALLY STIFFENED PANELS

(SMALL bit)

by

Bruce A.Bott

Jun Kondo

Alexis Ostapenko

This work has been carried out as a part ofan investigation sponsored by the Departmentof the Navy with funds furnished by theBureau of Ships Contract; NObs-94092

Reproduction of this report in whole or inpart is permitted for any purpose of theUnited States Government.

Fritz Engineering LaboratoryDepartment of Civil Engineering

Lehigh UniversityBethlehem, Pennsylvania

May, 1966

Fritz Engineering Laboratory Report No. 248.16

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..

..

248.16

INTRODUCTION

One of the more common ship building elements are the longi­

tudinally stiffened plates of Fig. l(a).(l) Their frequent use in

ships makes a thorough knowledge of their behavior important.

Consequently, a computer program was developed for the analysis of

such sections subjected to the combined transverse and axial loading

shown in Fig. l(b). The program described in this report is an

improved Fortran II version·of the program originally written in ~IZ*

Q

by Jun Kondo. The prog.ram analyzes a stiffened plate panel and

determines the maximum fixed and simply supported lengths and panel

can have under a given loading.

The analysis is basically a two step process. The main program

first develops'a moment-curvature-thrust curve for the given section.

Then the integration subroutine determines the maximum fixed and

simply supported lengths allowable for a series of midpoint starting

curvatures. Plotting these maximum lengths against the midpoint

starting curvatures produces a curve which is concave downward. The

peak on this curve is the maximum length the panel can have under

the given loading.

In the course of this analysis, the effects of residual

stresses and differing yield points in the stiffener and in-the

plate are considered. There are no limitations imposed on the

relative proportions of the cross section other than the requirement

* A GE compiler used at Lehigh University

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248.16 -2

that the ratio of the stiffener spacing to the plate thickness (bit)

be sufficiently small (less than about 40) to prevent plate buckling.

In the integration procedure used in the program, the section

is called upon to resist both positive and negative bending moments.

However, it was found that, for hybrid sections (different yield

points in plate and stiffeners) subjected to high values of axial

load, the moment-curvature curve would shift under varying load until

it was completed on one side of the curvature axis (only positive or

only negative moments). Such a position indicates that under axial

load alone, the section requires the application of some internal

moment along its center line in order to maintain equilibrium. The

integration cannot be performed for such cases qnd this is now

printed out on the output.

In addition to this alteration, provision has also been made for

some identifying run or data set number to be included on the output.

This humber which is part of the input data, appears on the various

pages of the output and aids in correlating results with input datq.

The text of this report deals primarily with the preparation of

data for the program, technical information about the program and its

operation, and an explanation of the output. The appendices include

a program listing (the main program, integration subroutine, and two

required functions) and a series of exa~ple runs. The arrangement of

the explanatory text conforms to the standards of Ship Design,

Division Instruction 10462 of the Bureau of Ships, U. S. Navy.

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...

248.16

PART I - IDENTIFICATION

-3

..

..

1. Title: Ultimate Strength of Longitudinally Stiffened Panels

(SMALL bit)

2. Brief Description: On the basis of a computed M-0-P curve

for the section under analysis, the program makes successive

computations of the fixed and simply supported panel lengths

corresponding to a given loading for each of a series of

mid-point curvatures. By comparing each new set of lengths

with those obtained on the last try, the maximum length is

determined.

The program consists of four parts:

1) The main program which provides the M-0-P relationship

for the section .

2) Subroutine INTEG (integration) which determines the simply

supported and fixed lengths corresponding to a given combi­

nation of axial and lateral load for some midpoint curvature.

3) Function BC which computeq, by parabolic interpolation, the

peak value between 3 pts. on a curve.

4) Function VAL which computes, by parabolic interpolation,

the peak value between 3 points on a curve.

Input data is read directly from cards into the main program.

Termination occurs when an END card is read. (The main program

will iterate through successive sets of data and within each of

these sets, subroutine INTEG will iterate the value of lateral

loading) .

3. a) .Author: JunKondo, Bruce A. Bott, and Alexis Ostapenko,

Lehigh University .

b) Date: May, 1966

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.;:~ 248.16

4. Code: Fortran II

5. Machine: GE225 (any other machine accepting Fortran II may

be used).

6. Security Classification: Unclassified

.7. Estimated Running Time: Punch input data 1.0 min

-4

Run time

Total

PART II - PURPOSE & METHOD

2.5 min

3.5 min

..

1 .. Description of Theory: See "Ultimate Strength of Longitudinally

Stiffened Plate Panels Subjected ,to Combined Axial and Lateral

Loading", by Jun Kondo, Fritz Engineering Laboratory Report

No. 248.13, Lehigh University, 1965.

2. Assumptions:

1) No buckling - as a result, the program is applicable only

to sections with low bit ratios.

2) The edges of the plate are assumed.free.

3) The distribution of the residual stresses in the plate is

assumed to be rectangular. The residual stress distri­

bution in the stiffener flange iS,assumed to be triangular.

The residual stresses in the web of the stiffener have

small effect and are therefore neglected. (See Fig. 2).

3. References: See report listed in 1) above .

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..

248.16

PART III - RESTRICTIONS

1. General Restriction$: None

2. Limitations For Use:

a) The condition of GFC = GFT = 0 (no residual stress in the

stiffener flange) will not run. (It results in division

by zero).

b) Ratios of GST > 2.0 do not produce exc.eptable results in

all cases and the output should be closely examined.

3. Nonstandard Hardware &- Tapes: None

4. Maximum Array Sizes: 6 Arrays are used: FI (200)

CM (200)

EPS (200)

AL (30)

X (25)

B (14)

PART IV - NONSTANDARD MACHINE

OPERATING INSTRUCTIONS

1. Special Operating Instructions: None

2. Restart Instructions: None

3. Error Correction: None

-5

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248.16 -6

PART V - DATA PREPARATION

J

l. Card .Input Form:"

Card Format Variable Name

1 15 IRUN

2 7F10 .4 AST

D

AFF

GRC

. GST

GFC

GFT

3 6F1O.4 P

QI

QIC

QMAX

DSI

FIC

. Comment

Label for data set (i. e. -set #15)

Nondimensional area of stiffener

Nondimensionaldepth

Nondimensional area of flange

Nondimensional residual stressin plate

Ratio of yield stress in stiffenerto yield stress in plate

Nondimensional compressive resi­dual stress in stiffener flange

,Nondimensional tensile residualstress in stiffener flange

Nondimensional axial load

Nondimensional initial value oflateral load (for iteration insubroutine)

Nondimensional increment of lateralload (for interation in subroutine)

Nondimensional maximum value oflateral load to be run

Increment of panel length to beused in subroutine Integ

Increment of curvature for sub­rOl:l.tine Integ

For additional data sets repeat the above sequence.

Last card - End (1st 3 columns) this terminates the run with an

illegal character on a data card.

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248.16 -7

Format2. . Sample Input: Comment

55 IS

.3 10.0 .45 0.0 1.0 0.3 0.3 7F1O.4

.4 0.0 3.0 3.0 .18 .15 6F10.4

3. Output Form Description:

Comment

..

1 &- 2

5

Lists input data and run number for checking and later

identification. Lists some computed member properties

(identified on output). Lists 201 points on the M-0-P

plot for the given panel.

Lists values of axial load P and lateral load Q.

Lists length, lateral midheight deflection, vertical

movement of ends, fixed end moment, and end slope for

a given midheight curvature. For each value of mid­

height curvature, this information is produced twice,

once for the fixed condition and once for the pinned

end condition.

As a peak of L is passed in each of the plots of PHC vs.

L, (fixed end and pinned end) the peak value of L and the

corresponding values of other quantities are computed

and printed.

Summary of results for each combination of axial and

lateral load.

4. Symbol List and Definitions:

A

AF

AFF

Total area of section divided by area of plate

Area of flange divided by area of plate

Area of stiffener flange divided by area of stiffener

oJCDepending on amount of output

Page 10: sentence P.ag.e: 2 Secof.1d to - Lehigh Universitydigital.lib.lehigh.edu/fritz/pdf/248_16.pdf · 248.16-2 that the ratio of the stiffener spacing to the plate thickness (bit) be sufficiently

FI Curvature array for the M - 0 - P plot

FIC Increment of curvature in the integration subroutine

FlO Curvature at point zero (see EPSO)

..

248.16

AI

AMPN

AST

AW

B

BC

BRC

BRT

CM

CMO

COSF

D

Dl

D3

DSI

EPS

EPSO

EY

-8

Moment of inertia of the section (Nondimensional)

Negative plastic moment capacity of the section(Nondimensional)

Stiffener cross sectional area divided by area ofplate

Area of web divided by area of plate

Matrix which stores the results obtained by the integ­ration subroutine for later printing in the summaryof results

Function which establishes equilibrium and compati­bility for each length increment

Total width of compressive residual stress zone in theplate divided by the total plate width

Width of tensile residual stress zone in plate dividedby total plate width

Moment array for the M - 0 - P Plot

Moment at point zero (see EPSO)

Cosine function

Depth of stiffener divided by plate thickness

Total section depth divided by plate thickness

Distance from elastic neutral axis to the extreme fiberin the stiffener flange divided by the plate thickness

Increment of length ~sed in the integration subroutine

Strain in the extreme fiber of the plate'

In the original language used for this program, dimensi­

oning an array for 200 locations reserved 201 machine

locations (0-200 inclusive). In Fortran II, dimensioning

for 200 locations reserves exactly 200 locations (1-200

inclusive). Therefore in the Fortran II translation, it

was necessary to create the variable EPSO to correspond

to the location EPS(O) in the original version.

Yield strain

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248.16

GFC

GFT

GRC

GST

H

I

I RUN

ISW

ISWA

ISWB

ISWC

ISWD

JA

JB

K

N

P

PHC

Q

...,9

Compressive residual stress in the stiffener flange

(Ofc) divided by the yield stress of the plqte (Oyp)*

Tensile residual stress in the stiffener flange (aft)

divided by the yield stress of the plate*

Compressive residual stress in the plate (0 ) dividedrcby the yield stress of the plate*

Yield point in the stiffener divided by the yield

point in the plate

Resultant force acting on the cross sect,ion in the

z-direction

Counter

Run number or data set number

Switching parameter

Switching parameter

Switching parameter

Switching parameter

Switching parameter

Counter

Counter

Counter

Counter

Nondimensional axial load as a fraction of the yield

axial load (P/Py )**, where Py = (yield point of plate)

x (total panel area)

Curvature at the midheight of the section

Lateral load (Nondimensional) (Q=(q)(E)(b)(d)/(yield

point of plate)2 (total area) where:

q = Hydrostatic pressure on section

E = Modulus of elasticity

b = Stiffener spacing

d = Distance from elastic neutral axis to extreme•fiber in stiffener flange)

See Fig. 2oJd: Note that this quantity can reach a value greater than 1.0 f()r

some sections.

Page 12: sentence P.ag.e: 2 Secof.1d to - Lehigh Universitydigital.lib.lehigh.edu/fritz/pdf/248_16.pdf · 248.16-2 that the ratio of the stiffener spacing to the plate thickness (bit) be sufficiently

..248.16

QI

QIC

QMAX

S

SINF

SQRTF

VAL

W

Initial lateral load value to be run

Increment of lateral load in the integration sub­

routine

Maximum lateral load value to be run

Section modulus (Nondimensional)

Sine Function

Square root function

Function for parabolic interpolation of curve peaks

Thickness of the stiffener web divided by the plate

thickness

-10

The following variables and arrays are intermediate and have no

general definition:

..

~':

Array

AU"

Cl

C2

C3

Cll

C12

Cl3

C14

F

Page 13: sentence P.ag.e: 2 Secof.1d to - Lehigh Universitydigital.lib.lehigh.edu/fritz/pdf/248_16.pdf · 248.16-2 that the ratio of the stiffener spacing to the plate thickness (bit) be sufficiently

• •

...._ _._-- ----------------------------------_ ..__._-------

C

.CCCCCC

(;

CCCC

CCCC

ccCC

.1HlS 15 THE EE.GllltbtlN!i._Or TWI' lUI .. pAMpA" .... ZCN COMII"U THEMOME~T - CU~vAT~RE • THRLST CUAVf rOR THE GIYIN SICTION.

..._----_ .._--_._----------ALL r.UANTITIfS ARE PLAcer IN CO~~ON SO THAT THEY WILL BE AVAILABLETO nE SUI:lROlT I~E AIIII) THEF".u~T~S-.lLIUU ARE REDUIRED,

COhMO" lLl\I.~. E£S•. 8RT' X, !Iwe. fl. el, liST' EPID. Elu. gl. [ •.a.lP. 1i1::L.. l,wA, ISWB, ISWC. ISWD. IS", AI.. DII. CM. CMU. "'1.1. JI:l.2C1. C2, CJ; REY. Cll, c:.12L~U--e.u.~CR. AM'N • .c.5..--.CA. ct!. K.3£lr, l~, OMA., OIC, IRUN

20U FOINTS wILL 4F COMPUTED ON THe M •. PHI. P CUAveHENCE. 200 lCCA[ICJl/S_U,nl"ENSION~1l rcR MOM& .. T leMI. CURYATuRE( FI I. ~N" STRAI~ I~ THF oUTER rlRER or THe PLATE I EPS I.

UI~~NSIUN CM[200J. FI12UOI.EPS[200J, 'lI301, X12'1

~CAU IN THE "AlA SET NUM~ER AND P~INT IT ON THE Top or THE ~-IHSTPAGE nF CUTPl. T• ~_. .___ _ .. .__.__._ ....

1 READ' 33. fRUN3~ £OPMAT [ 10; )

PRINT 200. IRUIII20n £ORM~T [ 9HIDATA SET, 15 1

....... ---_...... ---_.--=-:--::----,------.,.:-::------RcAU THI:: NI::Ci::SSASY INPUT DATA '~D PRINT IT OUT ON THE OUTPUT SHEI::TSO nAT INPU! CAN liE CORAELATtD wITH H.ESULTS. .

PAINT ?Ul201 FOFM~T [114UINPUT OATAII)

READ ~ G, AS T, a.UE .I1RC.G..S.J .G$C.ll£.I.I'-_ • g I. Q 1C, gMU. OS 1. f1 C2U ~UPMAr 17fl0.4J

PH I II: T 31 ....31 FOPMAT [ 140, IX, 3HAST, lX, IHD, IX, 3HArF, 6X, JHGHC. 61(.

1 3I-GST. 6X, 3H'iEC, 6X, JHGrr. 1X•.1HP. 1X•.~L... 6X~ .3Hr.ilC-L5.x,_? 4"'OMA" ex. 31;051, 6X, ,3HFrc, III

FRI/IlT ~O. AST,.O, Af'E •..~_~T....Gr.c.... GrT. , •.....Q..l.........o.t.4.. Q''14X. DSI.1 E I e

3n £O"MAT [ 1~E9.51

CC CO~PcTE ~ErT'ON PROPERTr~S.

CEY = 1.3344595E-,3REy = ~.~5~0~54E-2

Cl = U + 1.8A! • "He I (1. + GACIBRe • 1•• 8ATAf = An • AS!AW • AST • A£W = ~W I CA=I.+A5TD2=U+C1CM~ = .5 • [ 02 + AW • UIEL = C~M I AOJ = U! • FL

Page 14: sentence P.ag.e: 2 Secof.1d to - Lehigh Universitydigital.lib.lehigh.edu/fritz/pdf/248_16.pdf · 248.16-2 that the ratio of the stiffener spacing to the plate thickness (bit) be sufficiently

c

Z of 13C6 • cl I 1)3C7 • 1:'1. I "1AI • A • cL • 1)3 •• 5 .10 • 1./3. • AW • D.r 1•• D/J,JlS.AI/F.lRR • SnRTF I Al I A IREl = fI~ I ELCR . 0:1 I ~R

Cl • A • ~

C2 = .~ +r 1. + r.Sl • AST • r.llCJ • Cj + ~L

A~FN .!.5.rGST+A~.r+021-2 •• r.2./D1 •• '.C21.CJI/9cC PRI~T OUT TMf5E SECTION PROP~HTleS IN A TABLE.C

PrilH .~2

J, FO~~AT rl~~OSEr.TION PHnpl:'RTIFS IPRINT 166

lb~ FOFMAT [1~n.8K.3HA~T.1~X.1Hn.l~x.JHAFr.12X.3HQRC.1JX.2HRR.13X.cHFL1 • 12A. 4~A~PN. lJ~. l~H, III

PRINT 107. AST. n. A~F. GHC.RH. ~L. AMPh, ~

16/ FO~~AT I 8'15.11l;

C 'O~ A~y HYfl~ID S~CTI~N. ~IGH AXIAL LoAnS "ILL CAUSE THE HOM~~T •C GUHVAT~~E LU~V~ TO LIE ALL O~ O~E ~IDe OF TH~ CURVATuRE Axis.C ~e~C~, T~~ ~~LLC,lNG CHErK IS NeC~SSARY.CC 5EI: IF T~E:Re; IS A NEljAT IVE LHi Dill THE' ~O"'t;NT • CURvATURIi CUR v!:.C IF ""'T. r.O 0' TC TIoII; ""Xl SeT OF l)AU.C

I, r A'PN 1 H. 35, 3')J~ PH'~T ,~e-

Je fO~MAT l ~H~~A~IAL LOAD TOC HIGH [SeCTION CANNOT HAINTAIN ~wulLlhR11 U~ l I

GO TI1 1cC Sid I P HE H~AUI"'GS "OR 1101., (>uTPUr OF TH~ "'lIMENT • CUHVATUkE •C ST~AIH R~L.TtONS.

C34 PRINT 1bH

Ib,l FOI;i'1AT [ 1"o. 7K. 1~~. 9X. o;Hnl~l. 11)(. 5HCM!"l/. 11X. 6HI:F";[NJ.t 1f'X. 1HN. ~X. r;Hr, [1'\1. 11)1. 5HC .. !IH. 11)1. 6~epS!NI. II/I

cC CO~PlTE THE 'EQ~r~~D 200 POI~TS. O~ T~E CURVE.C

X [1 I • -BHX/ ~ I HRIx [ ;<] -0;(;x[4 I = BRCXI Ii / • -wXUI • IIALl171 = C1AL!lQI = :l1ALf1fl1 = ,;AL!201 = 'JALf 211 = J

..

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......_--------_ ..._---_._. -----

C

PAGE

AL!221 0 O.CA • Ar I rG>"c + G>"TI'Ir901 0 P • GST • Gf"TClolI.-GRC·P I+C6C20 11 •• GRC' GST + lIf"CI + (',71f"1 >"1190J - Cll 2. 100.100

1 0 0 f"I r90 I : C1.

? 1.1 rill/OJ· C2J 101. 101. 31 01 f" I 19 0 I 0 • 0 t

~ ALI301 0 -p • CACl = P - G5T + GrCIr! AL!301 - Cl) 102. 102, 4

10;; AU 30 1 oCt4 I.' ALf30) • Cll 5. 10~, 103

103 AL1301 = -.01>; N • 91

151; = 1 I>15~C 0 I>DliP ••• OU~

JA 0 10GO TO 24

AN. 90IS\;C = 7ALr301 o'IIQOIDEp = .005GO Tn <,4X[25] = .O?15~ 0 14ISI;A • 16151;8 0 1815WC : 815,10 = 9I : 3

·~.N·l

IrfNI 21. 104, 104104 AMLT • [ALf261 - ALl2511/lALf2111 - ALf28))

II ALI301 : AI.r21l1.+xl2-5J.GO TO to

21 N : 9115~A • 11>15;:8 : 1815,C • 22IS~D • 23XI?5) •• 02olU29l • F 1(91)olLIZ8l • FIIIIO]DEI' ••• 00'5olLr261 • CM[lIllALlZ5l • Ct1ti.aJ.ALrZ31 • EP511111

22 N • N • 1IF!N - ZOOI 10'5. 1~5, 21

lU5 olMLT • IAIo[Z61.- ALl2"11t olLoIZ.1f1 -.AI..H1UIZ3 olLor301 • olLr21l 1 - x125)

GO T010

3

.J.QF __IJ__.__

Page 16: sentence P.ag.e: 2 Secof.1d to - Lehigh Universitydigital.lib.lehigh.edu/fritz/pdf/248_16.pdf · 248.16-2 that the ratio of the stiffener spacing to the plate thickness (bit) be sufficiently

~. AL(23) = F • ALr3n)1 C61~ IFl ALI3011 <~. ln~. ~~

1l1- ALl30J = .~nt~, ~ = A~(JOJ I EL

CO; = C~ • FCg • P + F • OJco 107 K • 1. ~

101 AUKl = O.~(71 = .~~

~l~l = (;';~[~I = -~.

~rlOl = .F·2.~(11) = G';C • t.~(12) = ~111J - FUO 10~ ~ = 17. cO

lU~ ~l~l = )[~.~) +~.

X(13) = -F-GHX[14) = X[IJl • F • tJX[15l = ~[14l • GrcXl161 = XI'41 - 11FTCO 10~ K • 21. 24

10Q ~I~I = ~(~-Al + ' •• usrCO 12 • = 1. '"IFf ALf?3J > XJK_All 11. 111. 111

111 AUKI = XI~1

AUK>"" = X[~_HI

GO TO 1211 IF! AL!231 > ~fK>16I) 112, 112. 12

11;; AUK) = X[qALrK>a, = '1~-161

1;: CO~TI"'l'i:

A~r15)=ALr'5) - ~rr

AU16J • Alr161 - ClrrCl • O.C2 • A • FC3 • -, •• r~ - CqCl1 = ALII) • GFCCt,. I\Lr~, • llrTC13 • r11 • C12C2 • P - "1,'C3 = c~ - ,.-[Clt*AL[151 • C12* ALI1611-IC11.QFC-C1Z* ~rTI

CO ltD ~ • 1. '. 2Cl1 •• LI~l - ALIK_l1C14 = 'L[~I • AUK_IIICl: • AL[~-11 • ALrK-91Cl? • rt4 - 1:1-;Cl~ • ct4 • ALlK-S I - C15 * 'UK-,91Cl • Cl - ~1 tC2 • C2 > C12

11~ C3 = C1 - rl~Ir(C2 • C2 • C1 * 031 26, 113, 113

lU C2 • 2•• r.zALfZ4)' ~C[Cl, C', C3, ALl2311IrfABSFI1 •• ALI241/ALI2311 •• 000001 I 13. 114. 114

114 JA • JA • 1

""IoFI3

,

Page 17: sentence P.ag.e: 2 Secof.1d to - Lehigh Universitydigital.lib.lehigh.edu/fritz/pdf/248_16.pdf · 248.16-2 that the ratio of the stiffener spacing to the plate thickness (bit) be sufficiently

.. •

........._~ ..._---------------------------I ....; c PARE ,

._-_._-------------

--- ._----- .._---

~ I I

. £0" I J. _. .. -1F: L.a.-l.-llH'!3L..~t.1.1 S.S....~lUtUSL- ._-IIL-.!LL-~.E- _

115 ALI231 • ALI241GO TO 10

26 ALI23J • ALl231 .. DEPGO TO 10

13 ALl27] • O.·00 t 16 K • 1, '5. aJB • K + 1C3 • O.00 117 JJ • 1. 2Cl • AL 1241 "ALtJlh81· -. -- ..---- ------ --- --.--.---._ _ .._ -.-..--.--C2 • AllJ81 .. C1 .. C1 .. IALIJS.,(,J • 01 I 13 ••C3 .• C3 +..t'~--_.-..---------- --'__. _

11 7 JB • JF' • 1116 ALl271 = AL.127.J. ...l:3 _ ...- .. _ .... _... ~_

JA c H_.... -_._._-~_.._,-- -.--- -----------_._---_..

THE ~EXT STATEMENT IS SE~SITIVF. To AXIAL LOAD I serTION MODULUS S'PPRCACHI::S ZI::RO lAblD_lIAY_.CAIISEc DI \! I 5 I 0.' By 2UD Fgp HIGH \tALliES orAXIAL LOAD P,

1.31

13f,

13~

._-------,---_._----...

AL127] c ALE30] +IA .. tL .. IALI241~CSI ... ' .. ALI271/F:I/SLil = lSI<GO TO 11~

1A .Cl • Assr LlALt.C:6.Jd.lll.! .. _12'] L' AI (27! •IF [ Cl - .001l 15. 130. 130I • 1 • 1IFfl1 16,'16. 131Lil • I~I<A

GO Tn I1HIH (,;1 •• nnOll151132...1~_._( • I • 1IFfll 16. 16. 133LI3 • l~WH

GO Tn 118IFIN] 137. 138, 137Flc • AL(30)CHC • nlt7lEPSO • ALC;>.]GO TO 13t>rllNl • ALf301CHINl • AL (27]EPSIN] • AL[~4]

I • 300 134 K I 2~, 29ALIKI • ALfK+llL8 • UWCGO TO 118

17 X1251 •• 0215\00•• 111

ISI/S • 18GO TO 135

18 XI:!'l •• 1ISWA • 17151018 • 19

13C

137

H138

CCCCC

Page 18: sentence P.ag.e: 2 Secof.1d to - Lehigh Universitydigital.lib.lehigh.edu/fritz/pdf/248_16.pdf · 248.16-2 that the ratio of the stiffener spacing to the plate thickness (bit) be sufficiently

c

GO TO 135l' XII''' •• ~

ISwB • 16IS~A·111·

135 Lfl • ISIIDGO TO 111l

cC PRINT OUT THF r.CMFUT~D PCI~TS AFT~R CHECKI~G TO SEe IF T~ERE IS AC POSITIvE 8PA~CH ON T~E HCHENT • CURVAT~R~ CURVE, I T~IS CHeCK ISC SIMILAR TO r~AT ~EHFDRMEt AFTER THE PHIN! UUT or SECTION PHO~EHT.C IES .BOVE,Ie

21 N • 0IF CCMOI ~7. 37. 1~9

37 PRINT ~6

GO TO 113Q PRINT 169, ~, FlO, CMO, EFSO16Q FOR~AT [el7X. 13, ~F16.7JJ

CO 1 4 2 N I 1. 100NN • N + lno~RINT lbO, ~. FICNI. C~(NJ, EPS(~J, ~N, rJIN~I, CHINNJ, EPSINNI

14~ CO~TI"lJ~

C

e ONce THE 2nD POINT~ ~~VE b~E~ eCH~UTED, ijU TO THE I~TEGRATION ST~Pe

CAI.L I~H-~ee IIPON RElI:R'" FHn~ Tf'E INUGRATI0~ nEP, GO ~ACK A~D SEE IF THEHE ISe .NOT~ER S~T rF [ATA.e

GO TOeC THE 'EXT S~HIE~ OF STATE~ENT~ IS A ROUTI~E TO ~ETERMINE WHERE TMEe PRDU~.~ SHnUt D EP.~C~ TO NEXT. GIVEN THE VALUE OF T~E SWITCHINGe PAkA~ETER IS". IS~A, ISWF, IS~e, ISWO, THE ROUTINE PICKS THEe STATF~ENT NlJ'R~~ TO (0 Tr NEXT.e

PAGE 6

,O~ ,~

(;

ece

11" IFrLH-l0J 11Y. ~R. 12011" LEi • U' - Ii

GO TO r b. 7. F·. 9 1. LE120 IF ILf'-;' 01 121, 9/1, 122121 Ld : LE • 13

GO TO (11- 9U, H, n, 111, 19), Lb12'; LEi : U - /1

c; a T'.1 1;.0 ':. ;> 3 1. l F1

SHOllLlJ A~ I~Jrl~ r~ s(·~~ IF S~~TE~H.T 0,1 (IUT UF bCUIIJDS, Hq~

srAT~"FNT WILL H CALI f'D A~Jl) lH~ PROC:"~M ~lLL T"~MIN~TF.

9" f'RINT ~I

~7 'ORHAT (uf;"lrF'l9" CAlL ... If

~ ~Jr

I

Page 19: sentence P.ag.e: 2 Secof.1d to - Lehigh Universitydigital.lib.lehigh.edu/fritz/pdf/248_16.pdf · 248.16-2 that the ratio of the stiffener spacing to the plate thickness (bit) be sufficiently

~ROM STATEME~TS ~ AND ~j R~LD~, iT CAN BE SEEN T~i. SOHE CURVATU~E

"il ;4- ·t ESS na~'-- T" AT O~TFII~ TNED ABOVF TS USED AS A 'HA"TlNG PO I NTTO I~SUR~ THAT 1HE P~AII 0, THE CURVE WILL BE PASSED THROUQH,

~G.n"'-.4

GO tn ~

1_0JN.N~1IfrNT1~?-;-m

N .-901 O~ iF' Tl'p~ i ~il :1 • i ij 0;,jj0;10 ii ---------..-..10~ IF IFP~[~IJ.RRT·~ii11.BRC,;,991 '50, !to, 'H

"'-5" IF IFP~INl-F'IIN1/C'.GSTI '1, U1. 101

!·W·I~:;g;h~:~hti.aRc-·:9.'-~-;T; ,-------3 I' [FP~O·FIO/C7.r.STl ,; 101, 101_. "_._- ,"._--- . - _._-

1PAGF

... __ , __ _ _ - _..,-----_ _._---

-- "

SlJJJAov-r'rtc INT'"SUPROUTINE INTEG

~UBR~UT1~F INTEG IS A PRrGRA~ w~ic~ WHFN GiYEN t~F MOMENT ­r.UFii(A TURF PEn ti I'l~ rOil A SFC" j M;~ wilL DEtER",j NETwE MAX jMUHrl~Er AND PINNF[ LFNGT~ THAT THe ~~CTION CAN SUSTiiN UND!R A GIYENU.THAL AND A~IAL LOAD. - ------ ...-

T~E 'OLLl'lwINr. O~ANTIT'FS ARE PLACED IN COMMON SO THEv WILL BE4"A1LAsLE-rRt-" T~;: "diN PRoilRiM,-- .....

(:0"f'40'" j,N: EP~'; pilT; li~ iiiii',ri. C7~ jj!iT,'F"SO~ riO, QI, r; Ji,1P, REL', ISWA.lsIoIe, ISIoIC, iSWD~ isw, A~, aRi, &P~ CHO, A"LT, Je,;>Ci. c2. c3. REV. C11. r.12, c13, C14, E, C, A , c!l, c1, CB, II,3,IC, L~. 'f'4AX, CIC, IRuN

iJ i ,.eNs ION r~ i 20Q'~ f i i 20 oj ~--Ej:is12iillr-;-.Lnrr;-j(Un~·-B 114]

STARliNG wiTi' rio" ORIGiN'; tHF-pofNTso~-tHI-ponfivrBRiNcH OF THE~9ME~~I~VAT!:.~E CURve. ARE CHEell:Fa FOR A POSSIBL~ STARTING n. __CURVATUR~. I, ~('l TRAN~VFRSE LOAD IS ArTING ON THP SEcTION, THISWILLUSU~L.!Y ~.F: c.. nSf-N AT T~FORIGIN. L~QINT 9iiL_,.~

ccCCC

CCCCCi:

-c'CCCCCCCCC

cC ir Nr suiTABl E~r'liNt'CAN 'RE 'roU~il: GO O~To-liii!'ijFiTDifi nr,'C

RETURN51 G. nlN) - .4-IIQ-.---ol '- --. -- .

cc THE ~FXTSTATEMEN.S AIIF THE nilES WHir.H CHOOSETME'r.URYATURE AT THEc r'lIIIGIN A~ A ~TARTING ponT IF' LA.ERAL LOAD I_S ..z_ERO~_~_c

Ir [O} 60, 103, liD1O~·T.fn90 r---;·-;T------------

GO TO ~1

6" F • G6' PHC • F'

JAoi 2"c ._--------'-------_ .._- -_._- .__..

Page 20: sentence P.ag.e: 2 Secof.1d to - Lehigh Universitydigital.lib.lehigh.edu/fritz/pdf/248_16.pdf · 248.16-2 that the ratio of the stiffener spacing to the plate thickness (bit) be sufficiently

cccccccc

PAGE 2

~El I P HF. llTU.~ rop TW~ IN+.EGRATIO~"ANn ll!l;T TWF' VALliE or TwElOAD~ AT TwE 'Tn~ cr l~F ~HFET, " ,Ir JX~ OR JX~ A~E 1, THIS INDICATES THATCONve.OENCE HAS NOT BEENnAlAINEn Y!'T ro~ EITHFP tHF rlllEn nR PiNNEll END CASE ,.nR TWePR~S~NT UA1U~ or Q. ~WE' rO~VFAGF~C~ ,s oeTAINEn~ ,THEY ~ILL BE~F.T TO Z~Rn ANI1 T~IS ~Ill rAllSF TW~ IIBULTS TO AE PRINTEIl ON TWE~1J,",t1H1Y cWFET,

PRINT 'Oll.o~ rO_,",AT (1~1 !

PRINT 1n., P , Q10' rO"J"AT I 17Hnu ,iL 10AI' IPI ., "',4, 4X, 1/lwi ATF.llAl LoAD IOJ .,

1 n .• IQ = ".~EL

Jl(A = 1JX- = 1PRINT 100;

1n~ rO~,",A-T I l"n, n, CWCURVATlIPF, 8y, 6HLF.NnTW,' 9X, 7WLATERAL, 9x,1 /l~VFRTIr:AI, 9X,,,':' FNII , 1U, ~HF.ND, 11 x', 11110

PRINT 10

1~ roc,",AT (11Y. '~At~ ,~x, 10WnF,.lEftroN, ~ll, "WMOVEHENT, 9X, "HMO~EN1T, lnx', o;H~IOPf 1

PRINT 11 "1.1 rO_~AT ( ey, 9"~IIl':'F1GIolT~ '1V" bHAT MIDHEln':''i' I

IS"A a 1IS." a 7f>IS.r: • 1r.nH6K.1~~0

10~ AUK! a n.6' IS. • 1

IS.O a 1X 1171 • PX(1 '11 • 115'ost • rSIno 1n7 I< • 1. 11'0

107 xr~1 a 0.SN • n,CS • 1.~ • ?on

10= N • N ; 130n IF' r~] 76, '00, 1011HQ Ir IF'! PN] ~ PHt'1 tr,~~ 110, 110?on Ir Irl"- FW¢l 10AI_?~~' ?01 ' ,201 AMI T • Irln-PHr:,/lrIO-rlllll

Xll11 ~ c~n-AMlT.lt'MIl-r~tll~GO TO ~02

11" AMLT • (rlrNI - PHfl/lF'II~I~"ltN~lllXll11 D, C~INI -AMLT.[CM[NI.CH[N+lll

202 Ir [lClUII 111,1:1.1, 6~ ,111 pwr D IIHC •• 1

GO tn :tOO6~ IF' INI 203: 204, 2;'3

20' XI211 D EF~~-AMit.jFPsn-~P!l~JIGO tn '"05

20~ X[~lJ • FFSINI.AHLT.[EPSthl.~PStN.111

Page 21: sentence P.ag.e: 2 Secof.1d to - Lehigh Universitydigital.lib.lehigh.edu/fritz/pdf/248_16.pdf · 248.16-2 that the ratio of the stiffener spacing to the plate thickness (bit) be sufficiently

PAGE 3

205 xl231 • P~~

JIl • 5;'131 JI3 • J= - 1

IF" lJR.' 11', 90, 9;'11' ALr21.. 1.

GO TO 059 ~ I = 1

xI,OI • nSTxl,5) • x['~1

113 C1 • 1-1,3"3. +Krj51/6,lo~ELoxljOlC2 = [rS-S~o~loRE,'oxl'OI

C3 • (c:N/"FY+C!i+C1 ,oxi,olCil • =E'*CRC13 = v [ i 5" :.. 0 * ;c,-:" ia, * !IN'Cl' • " * FYC14 • -(17, + C1; • it~ ; eR * C~JxrI21·vl11'-rC?rC13·.~.D*C".C3.1C14-.5.C120C311/REL

11~ ~ = III • 1IF" rill) 64, j~6. in

?O~ IF" rrM~-X[1,11 115~ 11~, 116114 IF" reM'NI - ~ll'l) 115, 11~, 1161H IF" IXl12J - C"'IN+1JI 117, 66, 66117 III = III + 1

IF" 1 N_200, 11~. tiR' llR11" C1 • x'lll - AMp~

IF" rCl' 11~~ i'9; 1';'12" GO TO '6~, ~71, is~n11~ Cl • x'111 - AMP~

X(,Ol • ,5.xr201*c1/rXll11-xrl,,1GO Tn 43

64 Cl • C~U • xrl11N = 1X[?OI = ,2 * xr,n, • C1Ilxi1?I~Xr1iJlGO Tn 43

6~ XI'"' = ,l.xr,OI4 ~ I. = 1 + 1

IF" rl - 151113.1.13. A96' IF" r ~I J 207. "0 R. ? n7

20. AMIT = Ir~n-Xrl,lIIlCM"-CMil11XI,41= F"1~;AMLT*;rio~F"I;ll'xln,- = FFc:(1~AMI r.rFPSn-FP5rl1'GO TO A8

'07 AMIT = [c~r~1 - Xl,"lIrCMiNl-C,.,iN+lIJXI,4' • FlrNI-AMiT.iF"liNl~r,iN+l1JXlnl ,; FFc:rNl -AMI T • lFP!'!rN' - EPSlN*11 JGO Tn '8

67 C4 • [rMl2nnl - AMPNI/CIC5 • C4.Cl/r~Mrlo9'-CMr20011

Xl'41 = le1 + 1,1*F"P?nOI- C rllHF"IABSF"IF"1!20nl- *rrtI2001-F"I119Clll*C5111

Xlt'2) =IC4+1,J.EPSI2001-SCRTFIABSFIEPSI2001*JEPS[20Ul-EPSI1 9911*lC51)

6e IF" IA~c:F[l,-)(r?~J/)(['411-,nnnOl) 69. 121, 121121 I • I + 1

1F"'1-1·] 1?2. 12'. ~o

,-~--'-~----

Page 22: sentence P.ag.e: 2 Secof.1d to - Lehigh Universitydigital.lib.lehigh.edu/fritz/pdf/248_16.pdf · 248.16-2 that the ratio of the stiffener spacing to the plate thickness (bit) be sufficiently

701211

12471

12~

12'1n

13"

lQ 0/&:- 13 __122 X12'1 • XI'41GO --"To H3 ... - ..... -- --.-.---.---------..--.--.-----------..- ..-------....

6'1 Cl • xI231 + XI241Xt141 io iil\31 .~;.iieYiojjEi..iH.wi2li1SN • SINrlWl1411CS • ctlsrlrii41J~a~1 ~~D~g!~H~ _XI181 • r,14.C12eCRecSXI" • XI8' + CJXI",' • XI'I + 2. e C~ ---._.XI~I • XI21 • 4.exl?DI/I2 •• FVeix;Z11.XI221;eie.,LeC.11C5 • XI241 - XI2JI - - .---.CA • xr191CB • Xi201GO TO "D. 711. i!l~ir iX(j211 123, 710 71Cl • (~1121~XllilleXI191C2 • (r(lD'-XI111IeXIZDIC4 • 1llI191!~i~gJleXI19IeXJ201_C3 • lr~l + C~I/C4.. _ _C4 • lrl • XI191-C'eXI2011/C4C1 • BrIC;S: C4, Xi1tl~ 0.1ALI291 • ."31 +lxij31+.5.t~eC"XI201~eREY.REL.ClALi~31 • O. - -- - -IS~' • ,,-15"'0 • 2nSf •• 2.[~i~ • 0;

no 124 I • " 7~ 3ALi~l • vALlxrll. jij~il~ xii.jl~ Cll~ • ~ • i-Ir [)cr'4l] ;;ii. 72"; 72C1 •• ~*c~*AeY*AFL/XI2nl

C2 • X'2~I*AEY.AFL

C3 • -llI20,*rc5.lll;~1/C"C1 = BrrC1; r.2, xri3', C~IAU3"1 = O.~ . ,.,no 1'6 I • 1. 1n. ~

AL'~I io vAlixijl~ llij+il~ xii.jl: Cll~ '" I( • 6I( = MPRINT 127, PIolC. AL;K-2.1. AI ;1(;;11'1, ALlIe-t21. ALlIe;'61, ALllqror:;MAT r1l-n~ ;r1;'.~1K = K • 1Ir (K ;; 28' 129, 1;9, ,2BGO Tn 'n. 7~1. iS~Ano 130 I • 1. 23)t(1I '" xrl+llI • 1GO Tn '31Iri AI ("'] - AI. III IIi;,3• 13:1 ~ ;-J'GO TO 175, 771. is~c

ISIoJA = "K....

121'9S;

12~

127

.. .. •

Page 23: sentence P.ag.e: 2 Secof.1d to - Lehigh Universitydigital.lib.lehigh.edu/fritz/pdf/248_16.pdf · 248.16-2 that the ratio of the stiffener spacing to the plate thickness (bit) be sufficiently

.. ..

ISPl • IS." ~ I7~ C1 • AI 1~-41 - AI r~l

C? • AI {~1 • 2.-H;~-21.ALf~-~'C3 •• ~ • ~Ir. - r.l/r.?CA = F"ICCll = CAALIKI • ALrK-21~.5-r.I-rl/C'

K • K • '"134 ALfKI • VAI,IALlK~4'. AI.IK*'I. AL;KI. C31

K = K + '"IF" rK-~1J 13~, 1~5. 13~

13" AAA • ~Mr ~ FIr _ r~

5

11 of 13

CC ~RIN' CliT wHnHE" TMf PI~NFn Hie r:'ASF nR TME FllCl'n F.ND CASE MASC "EEN FOU~D. rAr.C~R"I~G Tr WMFTHER TMF ~Nn ~O~EN' j~ lEAO OR NOT.C

IF ( AL (K-6)) 13. 12. 1312 pRINT ,414 FOP~AT ( I~HnFIXFO END CASE

JX • ~

JX A • nGO TO '5

P PRINT 161~ FORMAT ( 1~~nPI~~E~ FNO r:A~E I

JX • 1JXF • n

1~ PRINT 127. AAARIJXl • lAAAAA • ~ • a-l'y*iALrK*le,+;r.osrIALIK*611-1.I*eRIRrJX + 11 • ALI~~3nl"'1,!X+?l AL rK-;i'~1

R[.'X+3'. ALrK-illl8rJX+4. AlrK-j"8 ( J X.~ I ' AL (1\ - II 18[JX."" AlA

14n

137

7 II!141

PRINT 1.3t>. Alf~~M". AI [1l-'~1. AI [II-tel. AL iii*121. AL [K-61. AUFaRHAT (l~n. l11X~ ~~i6.elIFrl~wP-/\5' i37~ 1~7~ 138L!l • I ~Wfl :.: 59GO Tn '60. !H. ~:l~,.6~. 6~L~ijl. ISIF "sw8 • 70J 1~9. 139. 1~n

LB. I~wP ~ 115GOT n ; 6't>. 1\ 7. 6~ '; IIll. 70]'. i BL" • IcWR ; 70GO TO 171. 72. n~ 74. 75. 7111'; isIF, r~Lt51 ~ ALI3" 1.1. 77~ 77~ • 5IS~B • I~." • 1ISwC • 2GO TO 7.

H a • O/"ELPRINT 401l. iRUN

CC ~RINT OUT TMF RE~uIREn I~FnRHATlr~.

C

Page 24: sentence P.ag.e: 2 Secof.1d to - Lehigh Universitydigital.lib.lehigh.edu/fritz/pdf/248_16.pdf · 248.16-2 that the ratio of the stiffener spacing to the plate thickness (bit) be sufficiently

40· FORMAT ( ~~jnAT' SFT. ix. i~ IPRINT 104. P. IIPRINT 400

400 FOFMAT ( 1ClHOSl'MMAFY OF RE!!lIi TS 1PRINT lO~

PRiNT 10PRINT 11p!iiNT 16IF rJX~ I -O~~ 4n1~ 40?

40' PRiNT 127. iRIJX1~ JX • " ;1GO Tn 405

402 PRHd' 40640~ FOPM,T ( l~HnN~ rO~VeRr.ENCe 14ij~ P!iiNT '4

Ir r JXA I 404. 40~. 4"4403 PRINT 127, IAIJX1~ JX ~ ~,i~1

GO Tn 407404 PRINT 40"

cc iNCR"MeNT tHF VAtU" or Q AND CHErli til !lEE iF'fM!iiiiIMUM YALUE HA!!C BEEN REACHED. IF IT HAS BEEN EXCEEDED, "ETURH TO THE "'IH PROGRAMC nTHEPWISF. RIIN T~E NExt CA!'lE:c

PAllE 6

JZ of 13

407

14~

II • II .. Olr,Ir In .. a~AXI 60. flO, 142...IlE'lJRNJA • J' • 1

PHr • "He + ricDO 143 K • 1. 21. ;Al;KI • AL;K + ;1AlIK+11 = ALIK+31GO TO 1\2ENr nr PRCr.R'M

..

Page 25: sentence P.ag.e: 2 Secof.1d to - Lehigh Universitydigital.lib.lehigh.edu/fritz/pdf/248_16.pdf · 248.16-2 that the ratio of the stiffener spacing to the plate thickness (bit) be sufficiently

FUNCTION·FUI\CTltN BcrBC1. Ill~2. IjC3. ac.,C3 • "rJC4 • ~(;4

till • l~

ltr4'O CJ· • BCl • C4 0 C.4.·.... IfCc ,.,. c;,,_. ~"C4=C 4- r J/ I2 • oBe loC4~H(;;21

KK'KK-t1~'KKJ~19U,PleO.R1PO

8l~1 1~IAHSF(C~l-O,QOOOQOlIA190.819D.8l40~11J1I AC=C4

RETUln;E"/C

YAL.FU~CTI(" vhL[A. fl. C. 111 .. __. _CU~Mr1N I. III, F~~. PRT. X. BRC. 1'1. C7. O!lT. FPSO. 1'10.

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AXIAL LUAU [PI. 0,6000 I AIE~AL LOAp rOI • J.ggoo

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_________.!!~ TA ~ ET__-"5-"P _

AXIAl I OH IPI ; Q.6UUQ

SUMMARY nr RES!!I rc

I AlERAI LeAn In! • J QUUO

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AT "IOHEIGHT

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• .. ..

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'.. • a •

-----.---------------------------------------------------

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___..lJA~ 51:1 .,--'01 _!

A~IA~ LOAV (PI = u.7JUO LATl:HAL LeAp [OJ. 1,OUOO

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UATA SE:l _~51,--- _

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..

A5T D

SttTION PkOPEkTltS

~J! tv .e lnrr 8D

aRC GST Qrc GF'T " 01 III (; UMAX US! F! t

2.DUDUD u.'DUDD o.'OUUU 1.2ug1iD 1.DUUUO ".DUUUU J.DUDDII D.lI1UIIU L.15uuU

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Page 40: sentence P.ag.e: 2 Secof.1d to - Lehigh Universitydigital.lib.lehigh.edu/fritz/pdf/248_16.pdf · 248.16-2 that the ratio of the stiffener spacing to the plate thickness (bit) be sufficiently

248.16

'Longitudinal'Girder

~-+-LongitudinalBulkhead

,

1

TransverseRib

LongitudinalStiffener

..(a) . TYPICAL MID-SHIP CROSS SECTION

q

(b). LOADING ON THE SIUP BOTTOM PANEL DUE TO WAVEACTION-HOGGING

Fig. J.,QNGITUDINALLY ,STIFFENED PLATE PANELS IN THE SHIPBOTTOM' STRUCTURE.

Page 41: sentence P.ag.e: 2 Secof.1d to - Lehigh Universitydigital.lib.lehigh.edu/fritz/pdf/248_16.pdf · 248.16-2 that the ratio of the stiffener spacing to the plate thickness (bit) be sufficiently

-

i1

248.16

Fig. 2 Typical Cross Section With Simplified. Residual Stress Distribution

Page 42: sentence P.ag.e: 2 Secof.1d to - Lehigh Universitydigital.lib.lehigh.edu/fritz/pdf/248_16.pdf · 248.16-2 that the ratio of the stiffener spacing to the plate thickness (bit) be sufficiently

I

248.16

1.

REFERENCES

Kondo, J.ULTIMATE STRENGTH OF LONGITUDINALLY STIFFENED PLATEPANELS SUBJECTED TO COMBINED AXIAL AND LATERALLOADING, Fritz Engineering Laboratory Report No.248.13, Lehigh University, 1965

Page 43: sentence P.ag.e: 2 Secof.1d to - Lehigh Universitydigital.lib.lehigh.edu/fritz/pdf/248_16.pdf · 248.16-2 that the ratio of the stiffener spacing to the plate thickness (bit) be sufficiently

248.16

ACKNOWLEDGEMENTS

This study is part of a research project "Built-Up Members in

Plastic Design" currently being carried out at Fritz Engineering

Laboratory, Lehigh University, Bethlehem, Pennsylvania. Professor

William J. Eney is Head of the Laboratory, and Professor Lynn S.

Beedle is Director.

The research has been sponsored by the Department of the Navy

under the Bureau of Ships Contract NObs-94092. The study was ini­

tiated by Mr. John Vasta of the Bureau of Ships. His interest in

the support of the project is gratefully acknowledged.

The task of translating the original program was greatly facili­

tated by the cooperation of the staff of the Lehigh University

Computer Laboratory.

Messrs. J. Vojta and R. A. Strawbridge made significant contri­

bution by offering general assistance. The report was typed by

Miss Marily L. Courtright. Her cooperation is appreciated.

Page 44: sentence P.ag.e: 2 Secof.1d to - Lehigh Universitydigital.lib.lehigh.edu/fritz/pdf/248_16.pdf · 248.16-2 that the ratio of the stiffener spacing to the plate thickness (bit) be sufficiently

Lehigh University

OCT 1 9 2010

Library

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0.