Performance of sand and shredded rubber tire mixture as a natural base isolator for earthquake protection

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• 作者：Srijit Bandyopadhyay ; Aniruddha Sengupta…
• 关键词：shake table test ; base isolation ; shredded rubber tire ; model test
• 刊名：Earthquake Engineering and Engineering Vibration
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：14
• 期：4
• 页码：683-693
• 全文大小：909 KB
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• 作者单位：Srijit Bandyopadhyay (1)
  Aniruddha Sengupta (1)
  G. R. Reddy (2)
  
  1. Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, 721302, India
  2. Structural & Seismic Engineering Section, Homi Bhaba National Institute, Mumbai, India
  
• 刊物类别：Engineering
• 刊物主题：Vibration, Dynamical Systems and Control
  Chinese Library of Science
  
• 出版者：Institute of Engineering Mechanics (IEM), China Earthquake Administration
• ISSN：1993-503X

文摘

The performance of a well-designed layer of sand, and composites like layer of sand mixed with shredded rubber tire (RSM) as low cost base isolators, is studied in shake table tests in the laboratory. The building foundation is modeled by a 200 mm by 200 mm and 40 mm thick rigid plexi-glass block. The block is placed in the middle of a 1m by 1m tank filled with sand. The selected base isolator is placed between the block and the sand foundation. Accelerometers are placed on top of the footing and foundation sand layer. The displacement of the footing is also measured by LVDT. The whole setup is mounted on a shake table and subjected to sinusoidal motions with varying amplitude and frequency. Sand is found to be effective only at very high amplitude (> 0.65 g) of motions. The performance of a composite consisting of sand and 50% shredded rubber tire placed under the footing is found to be most promising as a low-cost effective base isolator. Keywords shake table test base isolation shredded rubber tire model test