Integration of an omnidirectional self-powering component to an MRE isolator towards a smart passive isolation system
Integration of an omnidirectional self-powering component to an MRE isolator towards a smart passive isolation system
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DOI：
10.1016/j.ymssp.2020.106853
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发表时间：
2020-10
影响因子：
8.4
通讯作者：
Jian Yang;M. Christie;Shuaishuai Sun;D. Ning;M. Nakano;Zhixiong Li;H. Du;Weihua Li
中科院分区：
文献类型：
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作者：
Jian Yang;M. Christie;Shuaishuai Sun;D. Ning;M. Nakano;Zhixiong Li;H. Du;Weihua Li
基础隔振器是一种最常用和最有效的方法来减轻不必要的和有害的振动，以保护建筑物和其他关键民用基础设施免受地震事件的影响。因此，近年来基隔震技术有了很大的发展，特别是磁流变弹性体（MRE）隔震器。然而，这种MRE隔离器的运行需要外部电源才能启动，而外部电源可能会因地震运动导致的停电而失效。为此，本工作开发了一种具有自供电能力的MRE基隔离系统。这一特性使隔离系统能够自给自足，而不依赖外部电源。自供电组件是一种创新的全向元件，可以从各个水平方向收集振动能量。此外，自供电隔离系统执行速率相关的软化行为，克服了在日常操作中要求刚度坚硬但在地震发生时要求刚度柔软的矛盾要求。出于这个原因，这个新的隔离系统已经建立和测试，包括其MRE隔离器和自供电组件。并对其在建筑中的减振性能进行了研究。并进行了理论分析和验证，所得结论与实验结果吻合。实验和仿真结果表明，该隔震系统在受到地面运动时能够产生足够的电能，并且在减小楼板加速度和相对位移方面表现出很高的效果。
Base isolator is one of the most adopted and effective means of mitigating unwanted and harmful vibrations to protect buildings and other key civil infrastructure from seismic events. For this reason, the base isolation technology has advanced greatly in recent years, especially the magnetorheological elastomer (MRE) isolator. However, the operation of such an MRE isolator needs external power supply to be activated, which may fail due to the power outage caused by the seismic movement. To this end, this work developed an MRE base isolation system with self-powering capability. This characteristic enables the isolation system self-sufficient without relying on external power. The self-powering component is an innovative omnidirectional element and can collect vibration energy from all horizontal directions. In addition, the self-powered isolation system performs rate-dependent softening behaviour which overcomes the conflicting requirements that the stiffness is required to be hard during daily operation but soft when the earthquake happens. For this reason, this new isolation system has been built and tested, including its MRE isolator and self-powering components. Its vibration reduction capability for building is also investigated on a scaled building. The theoretical analysis and verification is also performed and the conclusions coincide with the experimental results. The experimental and simulation results demonstrate that this new isolation system is capable of generating electricity which is sufficient to power itself when it is subjected to ground motions, and that it shows a high effectiveness in reducing the floor accelerations and the relative displacement.