Linked Column Framing System Analyses toward Experimental Validation

The Linked Column Frame (LCF) was developed as a braced-free structural steel framing system intended for rapid return to occupancy earthquake performance level. The structural system consists of moment frames for gravity and closely spaced dual columns interconnected with bolted links for the lateral system. The links are sacrificial and intended to be replaced following a design level earthquake. This paper outlines the LCF system analyses conducted in preparation for large-scale system experiments. The system experiments are being planned to be hybrid experiments; a combination of physical test of a critical substructure tied to a numerical model of the building. The experimental substructure will consist of a 1-bay and 2-story LCF frame while the remainder of the building will be numerically modeled. A preliminary non-linear pushover analyses were used to validate the system ability to achieve the rapid return performance level. The objectives of these analyses were to detail design the physical specimens while considering laboratory constraints and as such have shed light on some of the important design considerations of the LCF system.