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Seismically Non-Compact Beam

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We are evaluating an existing SMF building that has a number of beams that are seismically non-compact because of the flange width to thickness (Actual is 7.67, Maximum is 7.23).

 

I was thinking of adding web stiffener plates to stiffen the flanges and prevent buckling but I’m not sure how to determine the buckling length.  My guess is there is some variation of plate theory that can be used to find the local flange buckling length and use that to determine the spacing of the stiffener plates.

 

Any references are appreciated.

 

Thank you,

 

Matt

 



Matt Steiner, P.E., S.E.
Thornton Tomasetti
2211 Michelson Drive, Suite 460
Irvine, CA  92612
T 949.271.3300  F 949.271.3301  
D 949.271.3314  M 949.910.8130  
MSteiner(--nospam--at)ThorntonTomasetti.com
www.ThorntonTomasetti.com


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