上海交通大学学报

上海交通大学学报 ›› 2004, Vol. 38 ›› Issue (06): 999-1002.doi: 10.16183/j.cnki.jsjtu.2004.06.033

所属专题： 王建华教授学报发文专辑

• • 上一篇    

土工织物拉拔试验中筋土界面力学特性

张鹏, 王建华(), 陈锦剑   

  1. 上海交通大学土木工程系，上海 　200030
  • 收稿日期:2003-06-21 出版日期:2004-06-01 发布日期:2021-04-25
  • 作者简介:张鹏（1977-)，男，江苏睢宁人，硕士，主要研究方向为加筋土的作用机理及其应用．|王建华（联系人），男，教授，博士生导师，电话（Tel.): 021-62932915; E-mail: wjh417@sjtu.edu.cn.

Mechanical Behavior of the Interface between Reinforcement and Soil in Pull-out Tests on Geotextiles

ZHANG Peng, WANG Jian-hua(), CHEN Jin-jian   

  1. Dept. of Civil Eng. , Shanghai Jiaotong Univ. , Shanghai 200030, China
  • Received:2003-06-21 Online:2004-06-01 Published:2021-04-25

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摘要：

针对土工织物筋土接触面的软化和塑性流动现象，根据拉拔试验的结果，提出了剪应力—位移关系的三阶段弹塑性模型．由筋材的受力特性建立微分控制方程，并通过有限差分法进行求解，得到了拉拔试验中的非线性位移、应变、拉力和剪应力等参量．算例分析了拉拔试验中的拉拔力—位移关系，并与线弹性模型和双曲线模型分析的结果进行比较．结果表明，分阶段弹塑性模型分析更符合实际情况．

关键词: 土工学, 土工织物, 拉拔试验, 弹塑性模型, 应变软化, 有限差分法

Abstract:

Based on the results of pull-out test on geotextiles, this paper presented a three-staged model for total shear stress-displacement to consider the strain softening and plastic flow. According to the mechanical characteristics of geotextiles, the non-linear differential equations are expressed in non-dimensional form and solved numerically using a finite difference method. The variation of the displacement, strain, tension and shear stress in pull-out test can be obtained. The relation between pull-out force and deformation was discussed based on the example analysis, and compared with the experimental pull-out test results. Comparison with the results of linear elastic model and hyperbolic model shows that three-staged elastic-plastic model is in good accord with practical situation.

Key words: geotechnics, geotextiles, pull-out test, elastic-plastic model, strain softening, finite difference methods

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