AISC Design Guide 13..
AISC Design Guide 13..
AISC Design Guide 13..
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least amount of weld metal with due consideration of the 4.1.2 Local Flange Bending<br />
material preparation requirements.<br />
When the column flange thickness is inadequate to<br />
resist<br />
the tensile flange force, a pair of transverse stiffeners extending<br />
at least one-half the depth of the column web is re-<br />
4.1 Determining the Column Stiffening<br />
Requirements<br />
quired. They must be welded to the loaded column flange<br />
In wind and low-seismic applications, various alternative to develop the strength of the welded portion of the transstiffening<br />
details utilizing transverse stiffeners, web dou-<br />
verse stiffener. The weld tothe column web must be sized<br />
bler plates, or a combination thereof, are permitted in todevelop the unbalanced force in the transverse stiffener<br />
LRFD Specification Section K1, depending upon the limit to<br />
the web.<br />
state(s) for which column stiffening is required. The welding<br />
requirements are also<br />
specified for each case therein. 4.1.3 Local Web Yielding<br />
In high-seismic applications, the required placement and<br />
When the column web thickness is inadequate toresist the<br />
welding of transverse stiffeners and web doubler plates is<br />
tensile or compressive flange force, either a pair of transgiven<br />
in LRFD Specification Section K1 and <strong>AISC</strong> Seisverse<br />
stiffeners or a web doubler plate,<br />
13<br />
extending at least<br />
mic Provisions Sections 9.3c, 9.5 and 11.3. These column-<br />
the depth of the column web is required.<br />
one-half<br />
stiffening requirements and alternatives are summarized<br />
In wind and low-seismic applications, when required<br />
in Sections 4.1.1 through 4.1.6.<br />
for a tensile flange force, and in high-seismic applications,<br />
4.1.1 Panel-Zone Web Shear<br />
the transverse stiffener must be welded tothe loaded<br />
When the column web thickness is inadequate toresist the<br />
required panel-zone shear strength, a web doubler plate<br />
is required.<br />
12<br />
The welding requirements for web doubler<br />
12Alternatively, diagonal stiffening can be used if it does not interfere<br />
with the weak-axis framing; see Section 5.6.<br />
plates are as summarized in Section 4.4.3 and 4.4.4.<br />
13See Section 5.4.<br />
Section A-A<br />
B<br />
transverse<br />
stiffeners fillet<br />
welded to column<br />
flanges<br />
transverse<br />
stiffeners fillet<br />
welded to column<br />
web<br />
A<br />
transverse<br />
stiffeners groove<br />
welded to column<br />
flanges<br />
A<br />
transverse<br />
stiffeners groove<br />
welded to column<br />
web<br />
B<br />
Section B-B<br />
Figure 4-2 Column with full-depth transverse stiffeners.<br />
18<br />
© 2003 by American Institute of Steel Construction, Inc. All rights reserved.<br />
This publication or any part thereof must not be reproduced in any form without permission of the publisher.
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