Page 86 - 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 71

where (5.5 1.29)/2 2.11
b
a (16.1 5.5)/2 5.31
p 3
n 7

Thus,
6 3 3 1 3 2.11 1 2 3 5.31
p eff 5 5 5.03
7
Using p in place of p, and following the AISC procedure,
eff

b b 2.11
1.0
b 5 2.11 2 5 1.61
2
4 1 4 1 0.47 2 5.5
a 5 min a , 5.31, 1.25 3 2.11b
2
5 mins1.48, 5.31, 2.63d 5 1.49
a 1.49 0.5 1.99
br
p 5 5 0.81
ar
1.06
5 1 2 5 0.79
5.03

Note that standard holes are used in the column flange.
4.44 3 29.1 3 1.61
t 5 B 5.03 3 65 5 0.798
c
1 0.798 2
r 5 ca b 2 1d 520.595
0.79 3 1.81 2.07

Since 0, use 0

T 29.1 kips/bolt > 15.7 kips/bolt, ok
When 1, the bolts, and not the flange, control the strength of
the connection.
2.2.1.5 Frame action. The method of bracing connection design pre-
sented here, the uniform force method (UFM), is an equilibrium-based
method. Every proper method of design for bracing connections, and in
fact for every type of connection, must satisfy equilibrium. The set of
forces derived from the UFM, as shown in Fig. 2.3, satisfy equilibrium

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