الفهرس 
Passive control systems.
Concept and development of FPS.Only 14 pages are availabe for public view
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Abstract
Recently, many strong earthquakes have occurred. This year alone, horrific earthquakes occurred in Turkey, Syria, and Morocco. These earthquakes caused huge losses of life and buildings. Earthquakes don’t kill people, but buildings do. Therefore, engineers are interested in creating structures that resist earthquake loads.
There are many methods and systems for resisting earthquakes in structures, and perhaps one of the most famous is: seismic isolation. Seismic isolation systems are one of the most effective technologies for protecting structures from lateral loading and improving the seismic performance of buildings against dynamic loads.
This study investigated the behaviour of base-isolated structures with LRB isolators for both near-fault and far-fault ground motions to show the difference between the response characteristics of the system for the two types of earthquakes. Naturally, in earthquakes near fault, a greater impact will appear on the seismically isolated structure, so there was interest in studying the two effects of near-field earthquakes, namely, the directivity effect and the fling-step effect, were considered.
The seismic response of a ten-story building was obtained by performing the time history analysis for a set of near-fault and far-fault ground motions. The seismic response was obtained for both fixed-base and base-isolated
conditions. Response parameters considered for the study were peak floor displacement, inter-story drift, absolute acceleration, base shear, and isolator displacement.
Reference to the relatively large values of displacements in the case of near-fault earthquakes, there was a proposal to add inhibitors to the structure to limit these displacements. Initially, a study was conducted to propose a location of viscous dampers for better seismic response of fixed base structure under far-fault and near-fault ground motions. In another step, a hybrid model was proposed that combines a seismic isolator and a viscous damper.
A comparative study was conducted between the seismic response of the building if it is on fixed foundations, seismically isolated only, or seismically isolated using a hybrid system of insulation and damper.
The results showed the effectiveness of the hybrid system in reducing displacement in isolated seismic systems under the influence of near-fault earthquakes.