Abstract Seismic isolation has been used to effectively protect buildings and bridges from earthquakes. One of the challenges in designing seismic isolation systems is that, many of them can only be designed to optimize their behavior to one targeted level of seismic hazard. When they are designed for rare events, their performance in more frequent events cannot be controlled, which may leads to non-optimal behavior. To address this issue, the Adaptive Variable Friction System (AVFS) was recently introduced, which can be designed to multiple levels of seismic hazard. This paper discusses, first, the mechanics of AVFSs, and a practical method for design. It then presents an extensive parametric study considering realistic structures and several ground motion intensities. It is shown that, when designed to the same performance target for rare events, compared to traditional friction pendulum systems, AVFSs are able to improve superstructure performance at more frequent events. The effect of design parameters on the performance of AVFS-isolated structures is also discussed.

中文翻译：

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使用自适应可变摩擦系统提高抗震性能

摘要 隔震已被用于有效地保护建筑物和桥梁免受地震影响。设计隔震系统的挑战之一是，许多隔震系统只能设计为将其行为优化到一个目标地震危险水平。当它们专为罕见事件而设计时，它们在更频繁事件中的性能无法控制，这可能会导致非最佳行为。为了解决这个问题，最近推出了自适应可变摩擦系统 (AVFS)，该系统可以设计用于多级地震危险。本文首先讨论了 AVFS 的机制，以及一种实用的设计方法。然后，它提出了一个广泛的参数研究，考虑了现实结构和几种地面运动强度。结果表明，当针对罕见事件设计相同的性能目标时，与传统的摩擦摆系统相比，AVFS 能够在更频繁的事件中提高上部结构的性能。还讨论了设计参数对 AVFS 隔离结构性能的影响。