Page 76 - Handbook of Structural Steel Connection Design and Details

Design of Connections for Axial, Moment, and Shear Forces

Design of Connections for Axial, Moment, and Shear Forces 61

Figure 2.10 Critical section at toe of fillet weld.

Thus the total strength of the load path in the channel flange is
834 28 862 kips > 855 kips, ok.
b. Gusset-to-brace block shear:
shear yeilding:
R v 5 0.90 3 0.6 3 36 3 1.5 3 17 3 2 5 991 kips

tension fracture

R 5 0.75 3 58 3 1.5 3 12 5 783 kips
t
5 991 1 783 5 1770 kips . 855 kips, ok
R bs
c. Whitmore section: The theoretical length of the Whitmore section
is (17 tan 30)2 12 31.6 in. The Whitmore section extends into
the column by 5.40 in. The column web is stronger than the gusset
50
since 1.29 / 1.79 > 1.5 in. The Whitmore also extends into
36
the beam web by 6.80 in, but since 0.470 50 / 0.653 1.5 in,
36
the beam web is not as strong as the gusset. The effective
Whitmore section length is
0.470 50
l weff 5 s31.6 2 6.80d 1 6.80 3 3 5 27.8 in
1.5 36
The effective length is based on F 36 and the gusset thickness
y
of 1.5 in.

Downloaded from Digital Engineering Library @ McGraw-Hill (www.accessengineeringlibrary.com)
Copyright © 2009 The McGraw-Hill Companies. All rights reserved.
Any use is subject to the Terms of Use as given at the website.