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Steel Designers' Manual - 6th Edition (2003)
Corus
Construction
Centre
www.corusconstruction.com
Robustness of frame
Subject Chapter ref.
MULTI-STOREY DESIGN
EXAMPLE
Design code Made by PEP Sheet no.
BS 5950: Part 1: 2000 Checked by TRM
To provide a degree of robustness and to reduce the possibility of 2.4.5.3
accidental damage, column ties should be capable of transmitting
(1) The general tying force given by 0.5 wf stLa for internal ties or
0.25 wf stLa for edge ties but not less than 75 kN, where:
or
wf = factored dead and imposed load per unit area
sf = mean transverse spacing of ties
La = maximum span within the overall length of the tie
tying force ( office)
= 05 . ¥ [ ( 287 . ¥ 14 . )+ ( 50 . ¥ 16 . ) ]¥ 75 . ¥ 75 .
= 338 kN > 75 kN
(2) At the periphery, the general tying force or an anchor force of
1% of the factored vertical load in the column, whichever is
the greater.
Max. factored column force ( Cols. Cl, C7, E 1 and C7) = 6360 kN
Therefore anchor force = 63.60 kN
Design connection for P = ± 338 kN
(NB these forces should not be considered as additive to other loads.)
The author wishes to thank Mr Alan Rathbone of CSC (UK) Ltd.
for his assistance in the preparation of this worked example.
:
Worked example 93
2
16