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RE: Special Moment-Resisting Truss Frames

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What issue was it in?  

I have designed trusses to resist seismic and wind in frames all over the world where UBC does not dictate or limit designs.  You basically must think in terms of nonlinear performance.  Trusses in high seismic applications offer special challenges that were addressed by designing the truss for a controlled mode of failure.  This was generally accomplished by using the "seismic fuse" top ductile connector plate and designing the truss for the applied ultimate strength / moment induced into the truss with an appropriate overstrength factor like the 1.25 used in concrete moment frame design.

Harold Sprague, PE
Krawinkler, Luth & Assoc.

-----Original Message-----
From:	Eddie Gonzalez [SMTP:Eagonzal(--nospam--at)ENG.CI.LA.CA.US]
Sent:	Tuesday, August 11, 1998 11:07 AM
To:	seaint(--nospam--at)
Subject:	Special Moment-Resisting Truss Frames

An article appeared in ENR, June issue, discussing a project in which special
moment-resisting truss frames were used for the lateral load resisting system. 
They made reference to a research report by Michigan University.

Q: Does anyone have any experience they can share using this system and/or the
research report addressing this system?

Thanks in advance
Ed Gonzalez