废旧轮胎颗粒-砂混合物的水平循环剪切特性试验研究  

Experimental Research on Horizontal Cyclic Shear Behavior of Scrap Tire Particles-Sand Mixtures

作　　者：徐小东[1] 鲁洋[1] 毛航宇 刘锦[1] 杨齐[1] 

机构地区：[1]河海大学水利水电学院,江苏南京210098

出　　处：《郑州大学学报（工学版）》2015年第4期62-66,共5页Journal of Zhengzhou University（Engineering Science）

基　　金：中央高校基本科研业务专项资金资助(2014B36614);江苏省普通高校研究生科研创新计划项目(KYLX_0472)

摘　　要：对废旧轮胎颗粒-砂混合物进行水平循环剪切试验,研究竖向荷载、轮胎颗粒含量以及轮胎颗粒尺寸3种因素对混合物的等效动剪切模量和等效阻尼比的影响.结果表明:竖向荷载越大,轮胎颗粒与砂混合物的动弹模量越大,等效阻尼比越小;轮胎颗粒含量增加,混合物的等效动剪切模量与等效阻尼比并不是都呈单调变化;试验中,在相同条件下,小粒径的轮胎颗粒与砂混合物的动弹模量相对要小,等效阻尼比要大一些.上述的试验结果给废旧轮胎颗粒-砂混合物在工程应用提供一定的参考.This paper uses the mixture to study its dynamic shear modulus and equivalent damping ratio under the different vertical loads and different tire particles content through horizontal cyclic simple shear test. The results show that when the vertical load on the mixture between waste tire particles and sand increases,its dynamic shear modulus increases and its equivalent damping ratio decreases. The dynamic shear modulus and equivalent damping ratio of mixture is not a monotonous variation with the addition of tire particles content. In the test,the dynamic elastic modulus of the mixture between tire particles in small size and sand is relatively small and its equivalent damping ratio is relatively big,which can provide a reference in engineer applications for the mixture between waste tire particles and sand.

关 键 词：颗粒尺寸 竖向荷载 颗粒含量 等效动剪切模量 等效阻尼比 

分 类 号：TU392[建筑科学—结构工程]