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The Structural Engineering Podcast
Episode 84 - MF Vs BF, Pick your team
Mar 19, 2024
In this showdown, Zach and Max debate between brace frames and moment frames in structural engineering, discussing stiffness, strengths, and load transfer. They explore design considerations, deflection amplification, and overstrength in building resilience. The conversation also covers the balance between brace frames and moment frames for seismic requirements and architectural objectives, highlighting the architectural influence on frame choices in different building types.
48:54
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Quick takeaways
- Moment frames are significantly heavier than brace frames, offering greater architectural flexibility.
- Brace frames are more cost-effective and efficient in resisting drift limits compared to moment frames.
Deep dives
Moment Frames vs. Brace Frames Weight Comparison
When comparing the weight per linear foot of moment frames and brace frames, the moment frames are significantly heavier. For a 10-foot bay, the moment frame per linear foot weight is 108 pounds, while the brace frame is only 47 pounds. As the bay size increases, the moment frame weight slightly decreases from 108 to 76 pounds per linear foot, whereas the brace frame weight increases from 47 to 44 pounds per linear foot for a 20-foot bay.
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