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首页> 外文期刊>Structural Control and Health Monitoring >Floor response spectra in isolated structures, subjected to earthquakes weaker than the design earthquake—Part II: Isolation with magnetically controlled elastomeric bearings
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Floor response spectra in isolated structures, subjected to earthquakes weaker than the design earthquake—Part II: Isolation with magnetically controlled elastomeric bearings

机译：经受比设计地震弱的地震的隔离结构中的地板响应谱—第II部分：磁控弹性轴承的隔离

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摘要

The stiffness of rubber bearings typically increases during weak earthquakes. This can reduce the efficiency of the isolation and jeopardize the equipment installed in structures isolated with such bearings. The problems and the parameters influencing the response of the equipment in structures isolated by high-damping rubber bearings (HDRB) have been systematically analyzed in the accompanying article.To improve the response of rubber isolators in the case of lower seismic intensities, a new isolation device, which adjusts itself to the intensity of the load, has been developed. It is made from a magnetically controlled elastomer (MCE), i.e. a rubber-like material whose stiffness can be varied by applying a magnetic field. The main topic of this research is the evaluation of the efficiency of this new device. In order to be able to test it, appropriate numerical models of the device and the control algorithm have been developed.The efficiency of the new MCE device for the protection of equipment subjected to weak earthquakes has been systematically studied using non-linear acceleration floor spectra. It was found that the majority of the parameters influencing the response in structures isolated by conventional HDRB also influence the effectiveness of the new device. Besides these parameters, the effectiveness of the new MCE was found to be heavily dependent on the stiffness of the superstructure and on the thresholds of the control algorithm of the device. The MCE is more effective in the protection of equipment installed in very stiff structures. Copyright © 2010 John Wiley & Sons, Ltd.
机译：橡胶轴承的刚度通常在弱地震中会增加。这会降低隔离效率，并危及安装在与此类轴承隔离的结构中的设备。在随附的文章中系统分析了影响高阻尼橡胶轴承（HDRB）隔离的结构中设备响应的问题和参数。为在地震强度较低的情况下提高橡胶隔离器的响应，一种新的隔离措施已经开发出可以根据负载强度进行调整的装置。它是由磁控弹性体（MCE）制成的，即一种类似橡胶的材料，其硬度可以通过施加磁场来改变。这项研究的主要主题是评估这种新设备的效率。为了能够对其进行测试，已经开发了合适​​的设备数值模型和控制算法。使用非线性加速底谱系统研究了新型MCE设备在弱地震设备保护方面的效率。 。已经发现，影响由传统HDRB隔离的结构中响应的大多数参数也会影响新设备的有效性。除了这些参数之外，还发现新的MCE的有效性在很大程度上取决于上部结构的刚度和设备控制算法的阈值。 MCE在保护安装在非常坚固的结构中的设备方面更有效。版权所有©2010 John Wiley＆Sons，Ltd.

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