Effective Column Length

Lyy $=8\mathrm{.}0$ m

Effective Column Length

Lzz $=8\mathrm{.}0$ m

Calculate:

Myy $=$

Mzz $=$

Using these formulas:

My$,$Ed $=(($h$/2)+100)$ x R$2=$

Mz$,$Ed $=(($tw$/2)+100)$ x $($R$1$ R$3)=$

My$,$Ed $=$ My$,$Ed X L$2-3/($L$2-3+$ L$1-2)=$

Mz$,$Ed $=$ Mz$,$Ed X L$2-3/($L$2-3+$ L$1-2)=$

Note:

Beam $1=((30$ x $1\mathrm{.}35)+(15$ x $1\mathrm{.}50)$ x $(4/2)=126$

Beam $2=(20$ x $1\mathrm{.}35)$ x $(6/2)=81$

Beam $3=((30$ x $1\mathrm{.}35)+(15$ x $1\mathrm{.}50))$ x $(8/2)=252$

Total Design Load $=459\mathrm{.}00$ kN

Column:$-305$x$305$x$97$

Steel Grade fy$=275$ N$/$mm$2$

Allowable Design Stress $=275$N$/$mm$2$

Properties:

h$=307\mathrm{.}9$ mm

b$=305\mathrm{.}3$ mm

tw$=9\mathrm{.}9$ mm

tf$=15\mathrm{.}4$ mm

r$=20$ mm

Iyy$=22250$ cm$4$

Izz$=7308$ cm$4$

iyy $=13\mathrm{.}4$ cm

izz $=7\mathrm{.}69$ cm

Wpl$,$yy$=1592$ cm$3$

Wpl$,$zz$=726$ cm$3$

Iw$=1\mathrm{.}56$ dm$6$

It$=91\mathrm{.}2$ cm$4$

A$=123$ cm$2$

E$=210000$ N$/$mm$2$

Calculate:

Web Buckling:

$($Equation $6\mathrm{.}22)$ hw$/$tw $=(72/\backslash$eta $=66\mathrm{.}56)$

Flexural Buckling about $"$zz$"$ Length A:

Effective Unrestrained Length $=8\mathrm{.}0$ m

$($Equation $6\mathrm{.}50)\backslash$lambda zz $=$

$($See $-$ Table $6\mathrm{.}2)$ h$/$b $=$

$($Table $6\mathrm{.}1)\backslash$alpha zz $=$

$($Clause $6\mathrm{.}3\mathrm{.}1\mathrm{.}2)\backslash$Phi zz $=$

$($Clause $6\mathrm{.}3\mathrm{.}1\mathrm{.}2)\backslash$chi zz & $<mtext></mtext><mn>1</mn><mtext></mtext><mi>/</mi><mi>(</mi><mi>\backslash </mi>$lambda LT$^2)$

$($Equation $6\mathrm{.}47)$ Nb$,$z$,$ Rd $=$

Calculate:

Lateral Torsional Buckling: Length A:

Effective Unrestrained Length $=8\mathrm{.}0$ m

NCCI SN$002$a Table $1\mathrm{.}1\backslash$lambda LT $=$

$($See NA $-$ Table $6\mathrm{.}5)$ h$/$b $=$

$($Table $6\mathrm{.}3)\backslash$alpha LT $=($curve$)$

$($Clause $6\mathrm{.}3\mathrm{.}2\mathrm{.}3-(1))\backslash$Phi LT $=$

$($Clause $6\mathrm{.}3\mathrm{.}2\mathrm{.}3-(1))\backslash$chi LT & $<mtext></mtext><mn>1</mn><mtext></mtext><mi>/</mi><mi>(</mi><mi>\backslash </mi>$lambda LT$^2)$

$($Equation $6\mathrm{.}55)$ My$,$b$,$Rd $=$

Mz$,$cb$,$Rd $=$

Interaction equation $=$

Simplified Interaction criterion $=$

$($NEd$/$Nmin$,$b$,$Rd$)+($My$,$Ed$/$My$,$b$,$Rd$)+1\mathrm{.}5($Mz$,$Ed$/$Mz$,$cb$,$Rd$)=$