Seismic behaviour and design of composite steel concrete structures

The report presents research activities on the seismic behaviour of composite steel
concrete moment frames co-ordinated in Europe within the ICONS project. Research has been focused on problems of ductility and resistance in the case where the connections of the steel parts are full strength "rigid".
Tests have been realised on subassemblages, on elements, on a plane frame and on a 3-D frame. Some tests were run quasi statically, others on shaking tables. Numerical modelling was done in parallel. Summary reports of these activities are presented. Based on that research and on literature data, for the structural types and elements other than those of typical European composite moment frames, design rules have been developed. These rules, which are now under implementation within the 2001 EN version of Eurocode 8 are presented with comments and reference to background.