新型三维格栅修补坑槽的界面力学特性数值研究
DOI:
作者:
作者单位:

河北工业大学

作者简介:

通讯作者:

中图分类号:

U418.6

基金项目:

国家自然科学基金资助项目[No. 52078182, 41877255]


Numerical study on mechanical properties of the potholes repair interface using new type 3D-geogrids
Author:
Affiliation:

河北工业大学

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    针对传统路面坑槽修补界面存在易脱落和耐久性差的问题,提出采用新型三维格栅用于坑槽修补界面增强,并借助有限元数值方法,综合对比研究了修补填料弹性模量、修补深度和荷载位置对有、无三维格栅增强层时的界面力学响应影响,研究结果表明:坑槽修补界面采用三维格栅增强层可改善界面受力,并显著降低坑槽修补界面处剪应力和拉应力,底面界面拉应力可减小至原路面应力的44%,且填料弹性模量越大,减小效果越明显;增强坑槽修补深度导致底面剪应力和拉应力逐渐减小,当坑槽修补深度为0.09 m时,底面拉应力减小至初始原路面应力的53%;坑槽顶面荷载最不利位置为坑槽侧面界面处,而三维格栅界面增强层能显著降低各应力峰值。

    Abstract:

    For the existing problem of separating easily and bad durability of interface of pothole repair, a new type of 3D-geogrid was used to enhance the interface mechanical mechanism. Further, based on the finite element numerical method, the interface performances with or without 3-D geogrid were investigated comprehensively under considering the effect of the elastic modulus of filling materials, pothole depth, and location of the surface load. The calculated results showed that the presence of the 3D-geogrid on the interface improved significantly stress condition and lowered remarkably the shear stress and tensile stress of the interface, the later can be reduced to 44% of that for the original pavement, especially for the pothole repair with the higher elastic modulus of the fills. The increase of pothole depth resulted in the decrease of the shear stresses and tension stresses at the bottom interface, and the tension stresses became the 53% of that for the original pavement for the 0.09 m pothole depth. In addition, when the load moved to the lateral interface, the most unfavorable load position was reached, the presence of the 3D-geogrid on the interface, however, will result in reducing significantly stresses peak values at repair interface.

    参考文献
    相似文献
    引证文献
引用本文

侯景煜,肖成志. 新型三维格栅修补坑槽的界面力学特性数值研究[J]. 科学技术与工程, , ():

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2023-09-21
  • 最后修改日期:2024-05-19
  • 录用日期:2024-05-21
  • 在线发布日期:
  • 出版日期:
×
亟待确认版面费归属稿件,敬请作者关注