No abstract

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.

Translation submitted by P. Curtis An urgent task in elastomer chemistry and technology is to reduce the volume of experimental work in the search for new additives with prescribed properties, in particular vulcanisation accelerators. A priority direction in this area is the use, for the development of active compounds, of information technologies based on the investigation of structure-property relationships (ref. 1). The present work proposes a computer procedure for predicting the ability of compounds to accelerate vulcanisation.