Rock and Soil Mechanics ›› 2020, Vol. 41 ›› Issue (7): 2369-2379.doi: 10.16285/j.rsm.2019.1560

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Laboratory study on elastic dynamic mechanics of rubber-sand mixture by bender-extender element method

YAO Yu-wen1, LIU Fang-cheng1, BU Guo-bin1, JING Li-ping2   

  1. 1. Civil Engineering College, Hunan University of Technology, Zhuzhou, Hunan 412007, China; 2. Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration, Harbin, Heilongjiang 150080, China
  • Received:2019-09-10 Revised:2019-12-10 Online:2020-07-10 Published:2020-09-13
  • Contact: 补国斌，男，1986年生，博士，讲师，主要从事结构抗震和弹塑性分析方法研究。E-mail: guobinbu@hut.edu.cn E-mail:m17081402004@stu.hut.edu.cn
  • Supported by:
    This work was supported by the Scientific Research Fund of Institute of Engineering Mechanics, China Earthquake Administration (2019D25), the National Natural Science Foundation of China (51708205) and the Natural Science Foundation of Hunan Province (2020JJ6073, 2020JJ4268)

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Abstract: Rubber-sand mixture, as a kind of low-cost and environmental protection geotechnical material, has broad applications, and the research on its mechanical properties is of great significance. In this study, the combined test of shear wave and compression wave for rubber-sand mixture is carried out by bender-extender element method. The propagation time of shear wave and compression wave is determined by discrete frequency scanning method and initial arrival wave method, respectively. After that, the elastic dynamic parameters such as initial shear modulus, constrained modulus and Poisson's ratio, are obtained. The influence of rubber content and confining pressure on elastic dynamic parameters of rubber-sand mixture is analyzed as well. The results show that under the same confining pressure, with the increase of rubber content, the initial shear modulus and constrained modulus of rubber-sand mixture gradually decrease, and the initial Poisson's ratio gradually increases. Under the same rubber content, with the increase of confining pressure, the initial shear modulus and constrained modulus of rubber-sand mixture gradually increase, and the initial Poisson's ratio gradually decreases. Finally, the coupling effect of the two factors and the related mechanical mechanism are analyzed.

Key words: rubber-sand mixture (RSM), bender-extender element, elastic dynamic parameters, coupling effect, mechanical mechanism

CLC Number: 

  • TU 521
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