ABSTRACT
This paper deals with the inelastic behaviour of moment-resisting frame members subjected to earthquake loading. Particular attention is given to the performance of partially encased steel members. Results from a number of parametric investigations, carried out to highlight the significance of primary design and response parameters, are presented. Current European guidelines for assessing the ductility of steel and composite frame members are discussed. Finally, the implications of the main findings and observations on the seismic design process are pointed out, and recommended procedures are outlined.
