08.01.2013 Views

Steel Designers Manual - TheBestFriend.org

Steel Designers Manual - TheBestFriend.org

Steel Designers Manual - TheBestFriend.org

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

This material is copyright - all rights reserved. Reproduced under licence from The <strong>Steel</strong> Construction Institute on 12/2/2007<br />

To buy a hardcopy version of this document call 01344 872775 or go to http://shop.steelbiz.<strong>org</strong>/<br />

<strong>Steel</strong> <strong>Designers</strong>' <strong>Manual</strong> - 6th Edition (2003)<br />

The<br />

<strong>Steel</strong> Construction<br />

Institute<br />

Silwood Park, Ascot, Berks SL5 7QN<br />

Problem<br />

Worked examples 533<br />

Subject<br />

BEAM-COLUMN EXAMPLE 1<br />

Chapter ref.<br />

ROLLED UNIVERSAL<br />

COLUMN<br />

18<br />

Design code Made by DAN Sheet no.<br />

BS 5950: Part 1 Checked by GWO<br />

Select a suitable UC in S275 steel to carry safely a combination of<br />

940 kN in direct compression and a moment about the minor axis of<br />

16 kNm over an unsupported height of 3.6 m.<br />

Problem is one of uniaxial bending producing<br />

failure by buckling about the minor axis. Since no<br />

information is given on distribution of applied<br />

moments make conservative (& simple) assumption<br />

of uniform moment (b = 1.0).<br />

3.6mf<br />

Try 203 ¥ 203 ¥ 60 UC – member capacities suggest Pcy of <strong>Steel</strong>work<br />

approximately 1400 kN will provide correct sort of margin to Design Guide<br />

carry the moment Vol 1<br />

ry = 5.19 cm Zy = 199 cm 3<br />

A = 75.8 cm 2 Sy = 303 cm 3<br />

ly = 3600/51.9 = 69.4 4.7.2<br />

Use Table 24 curve c for p c<br />

For p y = 275 N/mm 2 and l = 69.4<br />

value of p c = 183 N/mm 2<br />

1<br />

Table 23<br />

Pcy = 183 ¥ 7580 = 1387 ¥ 10 3 N 4.7.4<br />

= 1387 kN<br />

940<br />

1387<br />

16<br />

+<br />

= 068 . + 029 .<br />

- 6<br />

275 ¥ 199000 ¥ 10<br />

= 097 .<br />

\ Adopt 203 ¥ 203 ¥ 60UC<br />

4.8.3.3.1

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!