ABSTRACT
The paper addresses the investigation of seismic performance of dual structural configurations, composed of two substructures with different stiffness and/or strength. Literature review showed that such configurations could provide improved seismic performance in comparison with homogeneous ones. A practical dual configuration composed of eccentrically braced and moment resisting frames is analysed using three performance levels/limit states: Serviceability limit state, Damageability limit state and Ultimate limit state. The analysis showed potential benefits of dual structural arrangement, in the case of "pulse-like" ground motions. A bolted link for eccentrically braced frames (either in standard or dual configuration) is proposed and the preliminary results of the experimental investigation are presented. It is believed that bolted link solution may lead to a reduction of repair costs after a damaging earthquake.
