Reliability analysis of a reinforced concrete building equipped with hybrid control systems under multiple hazards

The aim of this study is to investigate reliability of a hybrid vibration mitigation technique in a reinforced concrete (RC) building. A numerical model of a RC building controlled by hybrid controllers consisting of base-isolation (BI) and tuned mass dampers (TMDs) is used to study its response to wind and earthquake ground motions. Different levels of hazard are considered and response quantities such as base shear, top floor acceleration and displacement are studied. Probabilities of exceeding limit states of collapse and serviceability are evaluated with and without the hybrid control systems. It is observed from the results that vibration mitigation is achieved from the hybrid system employed in the RC building varies significantly with the type of excitation. However, it is more reliable as compared to the BI system. It demands for a system having optimized parameters such that during the service life of the building, provides reliable performance under multi-hazard scenarios.