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RISA to sway or not to sway

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Listers,

 

I have modeled a 2-story, 4-bay (60’ long) moment frame in RISA-2D.  The frame is supported out-of-plane completely at the roof level but only at the 2 exterior columns at the floor level.

 

What is the best way to model the 3 interior columns and the floor level beams?

 

TIA 

 

Sharon Robertson, P.E.

Arcon Engineers 
5625 Ruffin Rd, Ste 130 
San Diego, CA  92123

858/503-7854
858/503-7858 fax

Visit us on the web at www.arconengineers.com