The seismic performance of steel frames can be efficiently evaluated via the Incremental Dynamic Analysis (IDA) approach. Generally, reference is made only to the transient interstory drift as a damage intensity measure (DM) but, as herein demonstrated, additional DMs could be suitably accounted for. The present paper is focused on the application of the IDA approach to Moment-Resisting (MR) steel frames by considering in total four DMs: the transient and the residual interstory drift, the residual load carrying capacity and the low-cycle fatigue of joints and members. The discussed numerical applications are related to four planar frames differing for beam-to-column connections and member cross-sections. Research outcomes underline how the additional information obtained from the proposed DMs contributes to provide a more accurate prediction of the effective post-earthquake performance than the one based on the sole transient interstory drift.
