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《Journal of Beijing University of Technology》 2009-02
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Experiments on a New Type of Seismic Isolation Bearing Combined With Teflon Frictional Sliding System and Springs

XUE Su-duo LI Xiong-yan CAI Yan-cheng (The College of Architecture and Civil Engineering,Beijing University of Technology,Beijing 100124,China)  
Series of test on a new type of seismic isolation bearing are introduced in the paper.The new bearing is combined with Teflon sliding system and helical springs.The function for seismic isolation of the bearing is ensured by the sliding interface between the disc of Teflon and the stainless steel plate,while the restoring force is provided by springs.During the experiment,the frictional coefficients between Teflon sheet and steel plate were tested,and the hysteretic loops of the bearing excited by the sinusoidal and record earthquake waves were tested as well.In addition,the test of the hysteretic properties of the bearing under the dynamic pressures were carried out.It is shown that the sliding velocity,vertical pressure and types of seismic excitation have important effects on the frictional coefficients and hysteretic characteristics.
【Fund】： 国家自然科学基金资助项目(50778006);; 北京市属市管高等学校人才强教计划资助项目(0500479020071)．
【CateGory Index】： TU352.12
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