Design and analysis of a seismic resilient steel moment resisting frame equipped with damage-free self-centering column bases

Many recent research studies focused on the development of innovative seismic resilient structures by chasing objectives minimising both damage and repair time, hence allowing definition able to go back undamaged, fully functional condition, in a short time. In this context, present study investigates an type self-centring damage-free steel column base (CB) connection its beneficial effects when used within moment-resisting frames (MRFs). The proposed consists rocking equipped with combination friction devices, providing energy dissipation capacity, post-tensioned bars disk springs, introducing restoring forces joint. Contrary conventional CBs, exhibits moment–rotation behaviours that can be described simple analytical equations, easy-to-apply design procedure. Numerical models connection, developed OpenSees, are validated against experimental results successively implemented four-storey case MRF. Incremental Dynamic Analyses performed derive samples demand for engineering parameters interest while accounting record-to-record variability. Fragility Curves show effectiveness solution reducing residual storey drifts protecting first-storey columns from damage, significant advantages terms repairability, resilience structure negligible increase overall cost. behaviour CBs is key requirement MRFs objective. • Innovative connection. Analytical Design procedure moment-rotation response Validated OpenSees model results. Curves. Enhanced structural through localised systems.