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Design of Steel Roof on Ductile Concrete Frame (seismic/lateral design

Design of Steel Roof on Ductile Concrete Frame (seismic/lateral design

Design of Steel Roof on Ductile Concrete Frame (seismic/lateral design

(OP)
Hello there,

I have recently moved to Europe and I'm now gaining my first experience using Eurocodes.

My question is in regard to a lightweight steel roof (but still quite big in plan dimension) on the top of a ductile (ductility factor 3) reinforced concrete structure.
In the past I would have designed the steel roof to an elastic load based upon "non-structural element" clauses of the code.

However following the same approach to Eurocode leads to a significantly larger lateral load than what I am used to. Since the main building model is set up for modal analysis, I can't simply put the roof on top as it will not take into account the resonance & whip-lash effect which the steel roof will be subject to (and the non structural element clauses try to estimate).

Reading through the Eurocode it seems to suggest that the non-structural clauses are related to elements such as partition walls, chimneys etc. This leads me to believe that there is an alternative way of designing such a roof to the Eurocodes. Is anyone able to point me in the right direction?

Regards,
Brad

RE: Design of Steel Roof on Ductile Concrete Frame (seismic/lateral design

(OP)
*bump*

Any ideas?

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