Testing and modeling of square carbon fiber‐reinforced elastomeric seismic isolators
Testing and modeling of square carbon fiber‐reinforced elastomeric seismic isolators
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DOI：
10.1002/stc.225
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发表时间：
2008-10
影响因子：
5.4
通讯作者：
Hamid Toopchi-Nezhad;M. Tait;R. Drysdale
中科院分区：
文献类型：
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作者：
Hamid Toopchi-Nezhad;M. Tait;R. Drysdale
钢筋橡胶隔震器（SREI）作为一种有效的隔震装置，是目前使用最多的隔震器。然而，SREI通常较重且昂贵，因此，这些装置的应用通常限于大型且昂贵的结构。弹性体隔振器的成本和重量的降低将允许它们在许多普通住宅和商业建筑物中的应用显著增加。纤维增强弹性体隔震器（FREI）是一种新型的弹性体支座，它采用纤维作为增强材料，而不是钢。FREI与传统的SREI相比具有几个优点，包括上级阻尼性能、较低的制造成本、重量轻，以及可以用切割成所需尺寸的单独隔离器以长矩形条生产。本文提出了一个简短的文献综述与FREIs的实验，并报告碳FREIs进行的实验研究，从轴承的机械性能，包括位移特性和阻尼值进行评估。本文的另一个组成部分是简要描述了一种分析方法来模拟轴承的循环响应。作为一种特殊应用，本研究中考虑的轴承不与试验压板粘合。对于具有合适的纵横比值的轴承，这种特定类型的应用导致稳定的倾翻变形，这降低了水平刚度并提高了轴承作为地震隔离装置的效率。试验结果表明，对于全球许多高地震风险地区，本研究中考虑的应用对于普通低层建筑的基础隔震是可行的。版权所有© 2007约翰威利父子有限公司。
Steel‐reinforced elastomeric isolators (SREIs), as an effective seismic isolation device, are the most common isolators in use. However, SREIs are typically heavy and expensive and, as a result, application of these devices is often limited to large and expensive structures. A reduction in the cost and weight of elastomeric isolators would permit a significant increase in their application to many ordinary residential and commercial buildings. Fiber‐reinforced elastomeric isolators (FREIs) are a new type of elastomeric bearing that employs fiber as the reinforcement material rather than steel. FREIs have several advantages over traditional SREIs including superior damping properties, lower manufacturing cost, light weight, and the possibility of being produced in long rectangular strips with individual isolators cut to the required size. This paper presents a brief literature review on experiments with FREIs, and reports on an experimental study conducted on carbon FREIs from which the mechanical properties of the bearings, including displacement characteristics and damping values are evaluated. A brief description of an analytical approach to model the cyclic response of the bearings is another component of this paper. As a special application, the bearings considered in this study were not bonded to the test platens. For bearings having suitable aspect ratio values, this particular type of application resulted in a stable rollover deformation, which reduced the horizontal stiffness and increased the efficiency of the bearing as a seismic isolator device. Test results suggest that for many high seismic risk regions worldwide, the application considered in this study can be viable for the base isolation of ordinary low‐rise buildings. Copyright © 2007 John Wiley & Sons, Ltd.