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

作     者：Srijit Bandyopadhyay Aniruddha Sengupta G.R.Reddy 

作者机构：Indian Institute of Technology Kharagpur Structural & Seismic Engineering SectionHomi Bhaba National Institute 

出 版 物：《Earthquake Engineering and Engineering Vibration》 (地震工程与工程振动（英文刊）)

年 卷 期：2015年第14卷第4期

页      面：683-693页

核心收录：

学科分类：08[工学] 080104[工学-工程力学] 0818[工学-地质资源与地质工程] 0815[工学-水利工程] 0813[工学-建筑学] 0802[工学-机械工程] 0814[工学-土木工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：funding by Bhabha Atomic Research Centre (BARC) Mumbai 

主　　题：shake table test base isolation shredded rubber tire model test 

摘      要：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.