超高性能混凝土优化预压混凝土圆柱管道的材料结构协同作用:实现可持续基础设施的轻量化设计
Yunfei Xie1, Chenyang Yuan2, Yajun Lv1
1School of Architecture, North China University of Water Resources and Electric Power, Zhengzhou 450045, China.
Materials (Basel, Switzerland)
|May 14, 2025
概括
超高性能混凝土 (UHPC) 通过优化核心厚度,显著降低了预应力混凝土圆柱管 (PCCP) 的重量. 这种材料创新保持了可持续基础设施的结构完整性和液压能力.
科学领域:
- 土木工程 土木工程是指土木工程.
- 材料科学 材料科学 材料科学
- 结构工程 结构工程
背景情况:
- 预压混凝土气管 (PCCP) 对于供水至关重要,但它们的大直径导致过重,限制了实际应用.
- 目前的PCCP设计面临着平衡液压效率与结构完整性和重量限制的挑战.
研究的目的:
- 通过材料优化和结构重新设计,提出和验证大直径PCCP的减重策略.
- 调查使用超高性能混凝土 (UHPC) 在PCCP核心中的性能优势,与传统混凝土相比.
主要方法:
- 有限元素分析 (FEA) 用2.8米内径的PCCP.的全尺寸实验模型进行了验证.
- 比较的数值模型分析了 UHPC 与常规混凝土芯的砂涂层中的应变和应力分布.
- 多变量线性回归分析开发了一个预测公式,将核心弹性模量,厚度和砂应力相关联.
主要成果:
- 与传统混凝土相比,UHPC的实施减少了20-30%的最大涂层张力.
- 一个预测公式可以根据UHPC的弹性模量直接优化核心厚度.
- 案例研究显示,核心厚度减少了25-35%,总重量减少了18-22%,保持了结构完整性.
结论:
- 拟议的方法有效地减少PCCP重量,利用UHPC材料特性和优化核心厚度.
- 这种方法解决了传统PCCP固有的重量限制,同时确保了相当的液压容量.
- 这些发现为可持续基础设施开发提供了一条途径,通过材料高效和重量优化的管道设计.
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