Hybrid Protection of Earthquake Excited Structures by Using Seismic Base Isolation and Multiple Tuned Mass Damper Systems

Earthquake is an unpredictable and inevitable fact, and the only effort to minimize the loss of life and property is to design and build the structure to resist the forces associated with earthquakes. Considering the Kobi, Northridge and Düzce earthquakes in particular, it is foreseen that public buildings such as hospitals, schools and multi-storey buildings should be protected with basic isolators against earthquakes. Various attempts have been made to achieve an earthquake-resistant design desired for buildings. As a result of these initiatives, significant progress has been made, which is significantly beneficial to reduce structural responses during an earthquake. The seismic response control of base insulated structures must be examined using single-set mass damper (STMD), multiple-set mass dampers (MTMDs) and distributed multiple-set mass dampers (d-MTMDs) under different earthquake ground motions. In this study, the structure was isolated with stratified rubber supports (LRB), lead-core rubber bearings (NZ), friction pendulum system (FPS) and flexible friction base insulator (R-FBI) isolation systems and on the top floor STMD, MTMDs and MTMDs at floors and d-MTMDs on floors. Also, for the parametric study, the insulator time period has been realized by changing between 2 and 2.5 and 3 sec. The mass ratio for all STMD cases was accepted as 2, 3, 5 and 10%. In addition, MTMDs were placed along the top floor as well as on the base and distributed throughout the height of the isolated structure