DEVELOPING AND NATURAL SCALE TESTING OF THE 3D BCS BASE ISOLATION SYSTEM
Victor Kostarev, Peter Nawrotzki, Petr Vasil’ev, Maksim Vaindrakh · Proceedings of the ... World conference on seismic isolation, energy dissipation and active vibration control of structures · 2019
The most common seismic isolation systems as various modifications of LRB, Rubber Pads and PFB bearings are effective for protection against horizontal seismic excitation.At the same time these devices could lead to a significant amplification of an isolated structure's seismic response in the vertical direction due to a coupling phenomenon of their horizontal and vertical components and certain stiffness in the vertical direction.These effects could provide an essential reduction of the total seismic isolation system's (SIS) efficiency and in some cases remain in structure seismic response approximately at the same level or even higher than for a rigidly supported structure.This paper presents results of optimization and efficiency analysis for the new developed 3D seismic isolation base control system SIS BCS for a typical NPP Reactor Building (RB) with 3D coil spring isolators and separately located 3D dampers.