CALCS PROC045
WEB STIFFENERS, BS5400

NOTATION

Aarea, stiffener
I2MA
lslength, stiffener, between supports
rradius of giration, stiffener
lambda, eta, k1, k2, Flscalculated coefficients
ksbuckling coefficient

APPLICATION

stiffened plates subject to compression

OUTPUT

buckling coefficient

SEE ALSO

other porcs & progs

THEORY

BS5400:PT3:FIG23

GUIDANCE

Buckling coefficient from Fig23 may be applied to longitudinal web stiffeners, transverse web stiffeners, bearing stiffeners and diaphragm stiffeners

INPUT FORMAT

LET Nm=:Nk=:A=:I=:ls=:PROC045

EXAMPLE

Call Statement

LET Nm=1:Nk=1:A=11:I=650:ls=2460:PROC045

Output

PROC045 BS5400:PT3, FIG23 web stiffeners, Rev 200497
r= SQR(I/A)= 7.687
lambda= (ls/r)*SQR(Fy(Nm)/355)= 31.78
eta= 0= 0
eta= .0083*(lambda-15)= 0.1392
k1= 1+(1+eta)*5700/lambda^2= 7.431
k2= .5*(k1-SQR(k1^2-22800/lambda^2))= 0.8589
Fls= k2*Fy(Nm)= 3.006
ks= .4*k2*(eta+1.7546E-4*lambda^2)= 0.1087
END045