Experimental study on dynamic properties of soilbag reinforced rubber sand mixture

被引：0
作者：
Liu, Fangcheng [1 ]
Tian, Wenhui [1 ]
Zheng, Hui [1 ]
Bu, Guobin [1 ]
Bin, Jia [1 ]
机构：
[1] College of Civil Engineering, Hunan University of Technology, Hunan, Zhuzhou
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2022年 / 41卷
基金：
湖南省自然科学基金;
关键词：
damping ratio; dynamic shear modulus; large scale cyclic shearing test; rubber sand mixture; soil mechanics; soilbag reinforcement;
D O I：
10.13722/j.cnki.jrme.2021.0760
中图分类号：
学科分类号：
摘要：
Rubber sand mixture(RSM) can be used as a cheap energy dissipation material. Reinforcing RSM with soilbags can improve its strength and stability as a base isolator beneath the foundation of structures cushion. A large cyclic shear test device was used to study the hysteresis characteristics of soilbag reinforced rubber sand mixture(SBRSM) under cyclic shear load，and the effects of the main factors such as the mass content of the rubber particles，the vertical pressure，the strain amplitude，the filling ratio of soilbag and the arrangement type of the soilbag on the two dynamic parameters，i.e.，the dynamic shear modulus and the damping ratio，of SBRSM were investigated. The results indicate that：(1) the dynamic shear modulus(Gd ) of SBRSM increases exponentially with the vertical pressure，and decreases with the rubber content(RC) with approximately linear lg Gd -RC relationship，and the slope of the lg Gd -RC relationship decreases slightly with the strain amplitude increasing. (2) In the strain range greater than 1%，the damping ratio of SBRSM decreases slightly with both of rubber content and strain amplitude，and decreases in power function with the vertical pressure. (3) Gd of SBRSM decays with the decrease of filling ratio. Though the damping ratio is less affected by filling ratio of soilbag，a lower filling ratio would reduce the influence of vertical pressure on the damping ratio. (4) Both lower Gd and higher damping ratio of SBRSM would be gained when laying soilbags vertically comparing with laying them horizontally，and the horizontal shearing direction affects the dynamic properties of SBRSM little when soilbags are paved horizontally. The mechanisms of dynamic deformation characteristics of SBRSM are revealed by comparison of the dynamic characteristics between SBRSM and RSM without soil bag reinforcement. © 2022 Academia Sinica. All rights reserved.
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页码：3419 / 3432
页数：13
相关论文
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