Real-time Hybrid Simulation of MRF-DBF system with Elastomeric Dampers Stage 2

This experiment investigates performance of a steel structure designed with elastomeric dampers. Structure was designed to satisfy a target of 1.5% maximum story drift ratio. Structure includes:
- A moment resistant frame (MRF) designed with strength criteria of IBC 2006 and doesn’t satisfy drift criteria of IBC 2006. This frame is called 100V in this study.
- A damped braced frame (DBF) that dampers are installed at. DBF includes 4,3 and 2 elastomeric dampers in the 1st, 2nd and 3rd stories respectively.
- A lean on column to include 2nd order effects.
MRF, floor masses, lean on column and 2% Rayleigh damping assigned to the 1st and 2nd modes are modeled analytically. DBF with elastomeric dampers forms experimental substructure. This assembly of a 100V frame with DBF is called 100V+DBF in this study.
Design specifications allow MRFs to be designed for 75% of design base shear. A frame designed with 75% of design base shear is called 75V and assembly of this frame with DBF is called 75V+DBF in this study. To investigate performance of a 75V+DBF, without changing MRF design, floor masses were increased by 33% percent in 75V+DBF experiments.
Different tests were done including:
- Static testing on DBF
- BLWN on DBF to investigate dynamic properties of DBF
- Real time hybrid simulations with a composite signal acceleration ground motion on 100V+DBF and 75V+DBF to find dynamic properties of 100V+DBF and 75V+DBF structures and compensation parameters.
- Real time hybrid simulations for frequently occurring earthquake (FOE), design basis earthquake (DBE) and maximum considered earthquake (MCE) hazard levels on 100V+DBF and 75V+DBF.