Probabilistic Evaluation of Seismically Isolated Building Using Quintuple Friction Pendulum Isolator
Multiple-level performance of building provided with seismic isolation by Quintuple Friction Pendulum Isolator (QTFP) is investigated multiple-level seismic hazards (design basis earthquake (DBE), service level earthquake (SLE), and maximum considered earthquake (MCE)). Five independent pendulum mechanisms along with six concave surfaces are included in this isolator. The paper describes nonlinear mathematical model and seismic response of isolated with Quintuple friction pendulum bearing. To control the demand of super-structure in different hazard levels, QTFP represents a novel invention of multi-phase adaptive friction pendulum isolation system. Total six design configurations of Quintuple Friction Pendulum isolator results from two different displacement capacities and three types of effective period and effective damping are considered. Probabilistic study of engineering demand parameters like isolator displacement, base shear for the isolated building, and top floor absolute acceleration under different levels of seismic hazards are to be carried out. It is found that, Quintuple Friction Pendulum isolator is very effective in all different level of seismic hazards under all seismic demand parameters.
KeywordsSeismic isolation Quintuple friction pendulum system Probabilistic evaluation Multi-hazard level earthquake
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