ABSTRACT

This paper illustrates the results of an experimental campaign performed on a scale prototype of a base dissipator called Mini Tribological ROCKing Seismic Isolation Device. This device allows a smooth, controlled and damped rocking by means of frictional layers and viscous elastic springs, which aim at decoupling the frequencies of the superstructure, at dissipating energy during motion and at re-centering the system once the external action vanishes. Four superstructures are tested – a shear type frame, braced and unbraced, a multi-story frame and a SDOF oscillator – with 96 ambient vibration and impulsive tests. An analytical model is illustrated and validated by the experimental tests. The reduction of relative displacement demand is analyzed for all the cases together with the reduction of the acceleration demand, showing positive effects of the base dissipator on the dynamic behavior of all the superstructures.

摘要

本文说明了在名为 Mini Tribological ROCKing Seismic Isolation Device 的基础消散器的比例原型上进行的实验活动的结果。该装置通过摩擦层和粘性弹性弹簧实现平稳、受控和阻尼的摇摆，其目的是使上部结构的频率解耦，在运动过程中耗散能量，并在外部作用消失后使系统重新居中。测试了四个上层建筑——一个剪切型框架、支撑和非支撑、一个多层框架和一个单自由度振荡器——进行了 96 次环境振动和脉冲测试。通过实验测试说明和验证了分析模型。分析所有情况下相对位移需求的减少以及加速度需求的减少，