Lightweight steel framed systems in seismic areas: Current achievements and future challenges

Lightweight steel framed systems (LWS) are innovative construction systems whose application has been steadily increasing over the years thanks to the huge benefits in terms of structural and environmental efficiency. Typical LWS products are usually combined with gypsum, wood and cement-based panels and can be used to build both structural and non-structural systems. After a brief description of the most common LWS constructional systems, this paper provides a state-of-the-art review of their behaviour under seismic actions. In particular, the main past and ongoing research works on lightweight steel framed structural and non-structural systems are briefly summarized and a critical comparison among seismic codes available in North America, Europe and Oceania is presented. Finally, an overview of studies carried out at the University of Naples Federico II, Italy, on this topic is presented together with the shaking table tests carried out recently on both LWS structural and non-structural architectural systems.