Experimental research on reinforcement-soil interface stiffness and damping ratio under cyclic shearing

LIU Fei-yu; WANG Pan; WANG Jun; HU Xiu-qing; CAI Yuan-qiang

doi:10.16285/j.rsm.2016.S1.021

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Experimental research on reinforcement-soil interface stiffness and damping ratio under cyclic shearing

更新时间：2026-06-25

- Experimental research on reinforcement-soil interface stiffness and damping ratio under cyclic shearing
- Vol. 37, Issue S1, Pages: 159-165(2016)
- 作者机构：
  
  1. 上海大学土木系,上海,200072
  2. 温州大学建筑与土木工程学院,浙江,温州,325035
  3. 温州大学浙江省软弱土地基与海涂围垦工程技术重点实验室,浙江,温州,325035
  4. 温州大学浙江省海涂围垦及其生态保护协同创新中心,浙江,温州,325035
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2016.S1.021
  CLC： TU443
- Online First：09 June 2018，
  
  Published：2016
- 稿件说明：
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LIU Fei-yu, WANG Pan, WANG Jun, et al. Experimental research on reinforcement-soil interface stiffness and damping ratio under cyclic shearing[J]. 2016, 37(S1): 159-165.
DOI：

LIU Fei-yu, WANG Pan, WANG Jun, et al. Experimental research on reinforcement-soil interface stiffness and damping ratio under cyclic shearing[J]. 2016, 37(S1): 159-165. DOI： 10.16285/j.rsm.2016.S1.021.

摘要

为了研究筋-土界面在遭受动力作用时的表现，利用大型直剪仪对土工格栅、土工编织布、土工无纺布和砂土界面进行了一系列循环剪切试验，得到了不同工况下界面的剪切刚度和阻尼比，并探究了循环次数与剪切刚度和阻尼比之间的规律。研究结果表明，同一循环次数时格栅-土界面的循环剪切刚度最大，土工编织布-土界面的阻尼比最大；剪切位移幅值为3 mm时3种竖向应力下界面都呈现出循环剪切硬化的特征，随着循环次数的增加，各竖向应力下的界面阻尼比有趋于某一值的趋势；砂土密实度越大，同一循环次数对应的剪切刚度越大，阻尼比越小，且随着循环次数的增加3种砂土密实度的界面阻尼比有趋于同一值的趋势；循环剪切位移幅值为5 mm的界面发生循环剪切软化现象，剪切位移幅值越大，界面同一循环次数的阻尼比也越大。

Abstract

In order to investigate the behavior of reinforcement-soil interface under dynamic load

a series of cyclic direct shear tests focused on geogrid，woven geotextile，non-woven geotextile with sand interface are performed through large-scale direct shear device. The shear stiffness and damping ratio of the interface in different conditions are gained; and then the relationship between cycle number and shear stiffness or damping ratio are analyzed. Results show that

in the same cycle number

the geogrid-sand interface has the largest value of shear stiffness; and the woven getextile-sand interface has the largest value of damping ratio. The interface exhibit cyclic shear hardening in the three values of normal stress with the cyclic shear amplitude of 3 mm. The damping ratio of the interface in different normal stresses tends to a same stable value with the increase of cycle number. The interface shear stiffness is increased and damping ratio is decreased with sand relative density

and with the increase of cycle number the damping ratio of the interface in different sand relative densities tends to a same stable value. Cyclic shear degradation is observed in the interface suffering cyclic direct shear with shear amplitude of 5 mm; the interface with a larger shear amplitude in cyclic direct shear has larger value of stiffness.

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Related Institution

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