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designing of horizontal bracing for AISC 341-05 spec

designing of horizontal bracing for AISC 341-05 spec

designing of horizontal bracing for AISC 341-05 spec

(OP)
i am designing the structure to Aisc 341-05, i am having horizontal bracing in all floors,
i have question in the connection of Horizontal bracing at the column node, where there is my beam, vertical brace and
horizontal brace connecting at the one column node.

As per Aisc 341-13.4a, beam with torsional restraint is required at brace intersection,
but i have designed the beam end conn(clip angle conn) as shear connection and vertical brace gusset bolted to column flange.

and the horizontal brace connected to beam web at column corner. Is this the Correct conn arrgt or i have design the beam conn with column
as moment conn.

thanks
senthil

RE: designing of horizontal bracing for AISC 341-05 spec

Sketch?

"It is imperative Cunth doesn't get his hands on those codes."

RE: designing of horizontal bracing for AISC 341-05 spec

This requirement of AISC 341-05 applies to V or inverted V brace connections near or at the midspan of the braced frame beam. A large unbalanced load can develop as the compression brace in the braced frame buckles and the brace at the connection is to provide restraint against lateral torsional buckling in the beam. This brace can also buckle, so a torsional restraint is required at the connection to add some rigidity for post buckling load distribution. The committee didn't believe that the standard provisions for lateral bracing were sufficient. The unbalanced loads increase as the connection is offset from the midspan of the beam.

The simple shear connection you provide at the column should be sufficient given that the brace meets the required stiffness requirements of AISC 341.

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