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An experimental and analytical study of the behavior of fiber-reinforced polymer piles and pile-sand interactions.

机译：纤维增强聚合物桩的行为和桩沙相互作用的实验和分析研究。

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摘要

Conventional pile materials (steel, concrete, and wood) can encounter serious corrosion problems in industrial or marine environments. Fiber Reinforced Polymer (FRP) composites are potentially suitable for these harsh environments. Since FRP composites have anisotropic properties, the theories developed for steel piles cannot be readily adopted to evaluate the performance of FRP piles. Interface shear tests in this study showed that the interface behavior between FRP composites and granular materials depended on the relative surface roughness, the normal stress level, the initial density of the soil mass and the angularity of particles. A relationship between interface friction coefficient and these factors was identified. Based on the Mindlin contact theory and the state variable friction law, a strain-softening constitutive law for interfaces was proposed. A new nonlinear solution for axial deformation of a single vertically loaded pile, which considers the partial slip development along the pile shaft during loading, was developed during this study. To account for the anisotropic properties of FRP composites, the Timoshenko beam theory was adapted to derive the solutions for buckling loads and load-deflection responses of vertically and laterally loaded FRP piles.
机译：传统的桩材料（钢，混凝土和木材）在工业或海洋环境中会遇到严重的腐蚀问题。纤维增强聚合物（FRP）复合材料潜在地适合这些恶劣环境。由于玻璃钢复合材料具有各向异性，因此针对钢桩开发的理论不能轻易地用于评估玻璃钢桩的性能。这项研究中的界面剪切测试表明，FRP复合材料与粒状材料之间的界面行为取决于相对表面粗糙度，法向应力水平，土壤质量的初始密度和颗粒的棱角。确定了界面摩擦系数与这些因素之间的关系。基于Mindlin接触理论和状态变量摩擦定律，提出了界面的应变软化本构律。在这项研究中，开发了一种新的非线性解决方案，该方案针对单个竖向受力桩的轴向变形，该解决方案考虑了在受力期间沿桩身轴的部分滑移。考虑到FRP复合材料的各向异性，Timoshenko梁理论适用于导出竖向和横向荷载FRP桩的屈曲荷载和荷载-挠度响应的解决方案。

著录项

  • 作者

    Han, Jie.;

  • 作者单位

    Georgia Institute of Technology.;

  • 授予单位 Georgia Institute of Technology.;
  • 学科 Engineering Civil.
  • 学位 Ph.D.
  • 年度 1997
  • 页码 277 p.
  • 总页数 277
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 建筑科学;
  • 关键词

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