橡胶砂动力变形特性试验研究

朱小军; 孙淼淼; 费康

doi:10.3724/j.gyjzG23112213

橡胶砂动力变形特性试验研究

doi: 10.3724/j.gyjzG23112213

朱小军^1,2,
孙淼淼^1,2,
费康^1,2

1. 扬州大学建筑科学与工程学院, 江苏扬州 225127;
2. 扬州大学岩土工程研究所, 江苏扬州 225127

基金项目:

国家自然科学基金项目（51778557）。

详细信息

作者简介:
朱小军，博士，主要从事土体静、动力学研究。zhuxiaojun@yzu.edu.cn

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出版历程
- 收稿日期: 2023-11-22
- 网络出版日期: 2026-01-06

Experimental Research on the Dynamic Deformation Characteristics of Rubber-Sand Mixtures

1. School of Architechtual Science and Engineering, Yangzhou University, Yangzhou 225127, China;
2. Geotechnical Engineering Institute, Yangzhou University, Yangzhou 225127, China

摘要

摘要: 利用空心圆柱扭剪系统，开展了不同橡胶含量、粒径比和固结比条件下橡胶砂的动力变形试验，研究了3种因素对橡胶砂动力变形特性的影响规律和机理。试验结果表明：在等向固结方式下，橡胶含量高的橡胶砂试样在循环扭剪荷载作用下发生破坏所需的振动周次更多；橡胶砂粒径比增大时，橡胶砂抵抗变形能力增强，降低了循环扭剪荷载对试样的破坏作用；橡胶砂试样动剪模量随着橡胶含量的增加而减小，随着粒径比的增加而增大；试样累积耗散能随着橡胶含量的增大逐渐减小，因此橡胶含量为5%的试样累积耗散能最高；橡胶含量为5%的试样阻尼比显著高于橡胶含量为10%和15%的试样，并随着粒径比的增大而减少。在非等向固结时，橡胶砂的剪应变明显减小，发生剪切破坏需要更大的剪切应力，橡胶含量和粒径比对试样的动力变形影响相对减小，试样动剪模量衰减速率更快，阻尼比随橡胶含量和粒径比的变化幅度降低。
- 橡胶砂 /
- 空心圆柱扭剪 /
- 粒径比 /
- 动剪模量 /
- 耗散能
Abstract: By using the hollow cylinder torsional shear test system， this study investigated the dynamic deformation characteristics of rubber-sand mixtures with varying rubber contents， particle size ratios， and consolidation ratios. The effects and underlying mechanisms of these three factors on the dynamic deformation characteristics were explored. The test results showed that under isotropic consolidation， the specimens with higher rubber content required more vibration cycles to fail under cyclic torsional shear loading. As the particle size ratio increased， the specimens' deformation resistance was enhanced， thereby reducing the damage induced by the cyclic load. The dynamic shear modulus decreased with the rubber content but increased with the particle size ratio. The specimens with 5% rubber content exhibited the highest cumulative energy dissipation， which decreased as the rubber content increased. Furthermore， the damping ratio at 5% rubber content was significantly higher than that at 10% and 15%， and it decreased as the particle size ratio increased. Under anisotropic consolidation， the shear strain of the specimens decreased obviously， and a greater shear stress was required to induce failure. The influence of both rubber content and particle size ratio on the dynamic deformation of the specimens was relatively reduced， the attenuation rate of the dynamic shear modulus accelerated， and the sensitivity of the damping ratio to changes in both rubber content and particle size ratio decreased.
- rubber-sand mixture /
- hollow cylinder torsional shear test system /
- particle size ratio /
- dynamic shear modulus /
- dissipated energy

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