Scholarlink

<p>To address the challenge that traditional uniformly distributed fiber-reinforced soils fail to accurately characterize the spatial variability of fibers in practical engineering, this study proposes a reinforced soil analysis method incorporating fiber random distribution characteristics. Through compaction tests and unconsolidated-undrained triaxial tests, the mechanical reinforcement mechanisms of reinforced soils with varying fiber contents (0–0.20%) were analyzed. A numerical model simulating fiber random distribution was developed and validated against the experimental results. Based on this model, reinforced slope models with different fiber contents were established to evaluate their seismic performance under moderate (PGA=0.2&#xa0;g) and rare (PGA=0.5&#xa0;g) earthquake conditions. The results demonstrate that fiber reinforcement significantly enhances soil cohesion but minimally improves the internal friction angle. Under moderate earthquakes, fibers do not fully mobilize their reinforcing effect, whereas under rare earthquakes, the plastic strain magnitude (PEMAG) peak of reinforced slopes decreases notably, with reductions in peak and residual displacements at varying heights. The optimal polypropylene (PP) fiber content is determined as 0.15%, providing a reference for slope seismic design.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Mechanical Reinforcement Mechanisms and Seismic Performance of Randomly Distributed Polypropylene Fiber-Reinforced Soil

  • 期刊论文

  • 发表日期：

    2026年1月23日

查看全文
  • Kun Tang,
  • Jianguo Xu,
  • Liang Huang

摘要

To address the challenge that traditional uniformly distributed fiber-reinforced soils fail to accurately characterize the spatial variability of fibers in practical engineering, this study proposes a reinforced soil analysis method incorporating fiber random distribution characteristics. Through compaction tests and unconsolidated-undrained triaxial tests, the mechanical reinforcement mechanisms of reinforced soils with varying fiber contents (0–0.20%) were analyzed. A numerical model simulating fiber random distribution was developed and validated against the experimental results. Based on this model, reinforced slope models with different fiber contents were established to evaluate their seismic performance under moderate (PGA=0.2 g) and rare (PGA=0.5 g) earthquake conditions. The results demonstrate that fiber reinforcement significantly enhances soil cohesion but minimally improves the internal friction angle. Under moderate earthquakes, fibers do not fully mobilize their reinforcing effect, whereas under rare earthquakes, the plastic strain magnitude (PEMAG) peak of reinforced slopes decreases notably, with reductions in peak and residual displacements at varying heights. The optimal polypropylene (PP) fiber content is determined as 0.15%, providing a reference for slope seismic design.