Hybrid Vibration Control of Hospital Buildings against Earthquake Excitations Using Unbonded Fiber-Reinforced Elastomeric Isolator and Tuned Mass Damper

Lifeline structures such as hospital buildings need to be specifically designed that they experience reduced vibrations when subjected earthquake excitations because it will difficult vacate under the event of any earthquake. Therefore, ensure operational condition in an existing building, present study utilizes flexible unbonded fiber-reinforced elastomeric isolators (UFREIs) for its seismic isolation. The UFREI-based isolation system is restrict structural acceleration within tolerable limits building inhabitants even during hazards. However, use results excessively large bearing displacements, which either may not practical and/or pose several serviceability issues. tuned mass damper (TMD) attached base floor UFREI-isolated reduce isolator displacements. Properties hybrid vibration control are according site-specific scenario New Delhi, India. Further, nonlinear time-history analyses with TMD carried out, and responses compared uncontrolled response. Results show peak displacement response by 9% 27%, due addition TMD. Importantly, required design decreased without compromising effectiveness In fact, performance superior alone.