Vierendeel Truss - ASCE Seismic Design Response Coefficient R Value

[BmoreENG]

I'm designing a Pedestrian Bridge linking two buildings. I am using a steel Vierendeel Truss for my gravity and lateral system.
From ASCE 7-16 Table 12.2-1, what is the appropriate Seismic Force-Resisting System and its corresponding R, Omega, and Cd?

Is C.4 Steel Ordinary Moment Frame or C.2 Steel Special Truss Moment Frame appropriate?

 

[KootK]

I would say that it is definitely not a special truss moment frame. That's a very particular system for a very particular application. I can see why one might be drawn to that though.

I feel that conventional moment frame approaches make more sense for something like this. The degree of ductility to pursue being up to you.

Your design will be a bit atypical in the sense that your joints will have significant moment in them from gravity load as well as seismic.

 

[driftLimiter]

Ch 12 is for building structures, floors, walls, frames, etc.
The premise of your question suggests that you are treating the bridge itself as a building structure.
I don't agree with that premise at all. I think of the bridge as a component.

You may consider reading ASCE 7-22 Section 11.1.2 which defines the scope of the seismic requirements.