Experimental Investigation on the Seismic Performance of a Service Vibration Isolation Platform for Protection of Equipment

摘要

This paper summarizes the experimental studies to assess the seismic performance of a commercially available vibration isolation platform. The studies consisted of earthquake simulation tests using a three-directional earthquake-simulator. The test specimen included a vibration isolation platform, based on negative stiffness springs, supporting generic/simulated equipment. The platform-equipment set was subjected to seismic shaking that intended to simulate a variety of ground and floor accelerations of multistory buildings under low-intensity earthquake shaking. This paper includes: (1) a description of the isolation platform and experimental settings, (2) sample of experimental results, and (3) findings on numerical analysis of the isolation platform placed in different floors on a multistory-story building subjected to ground shaking that may be representative of moderate/low seismicity areas. The paper concludes on the performance of the vibration isolation platform for seismic protection of equipment in different buildings floors.