用PU砂材料改装的混凝土样本的柔性反应:实验和数值建模
Sadi Ibrahim Haruna1,2, Yasser E Ibrahim1, Zhu Han2
1Engineering Management Department, College of Engineering, Prince Sultan University, Riyadh 11586, Saudi Arabia.
Polymers
|October 28, 2023
概括
这项研究表明,聚氨接合剂 (PUG) 在土木工程维修中显著改善了混凝土梁的偏移. 有限元分析验证了实验结果,证实了PUG的实验结果.
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:
- 聚氨 (PU) 复合材料是基础设施 (如跑道和道路) 的关键维修材料.
- 评估聚氨接合剂 (PUG) 对于有效的维护至关重要.
- 这项研究的重点是用PUG修复的混凝土的柔性性能.
研究的目的:
- 为了评估用聚氨接合剂 (NC-PUG) 修复的普通混凝土的柔性行为.
- 开发和验证一个有限元 (FE) 模型来模拟NC-PUG的屈曲反应.
- 在三点曲下分析复合材料的行为.
主要方法:
- 实验性三点曲测试NC-PUG标本的不同PUG覆盖厚度 (5毫米,10毫米) 和配置 (上/下).
- 使用压力和拉力测试的应力-应变数据开发一个3D有限元模型 (FEM).
- 实验数据与FE模型预测的比较.
主要成果:
- 参考混凝土的最终屈曲应力为5.56 MPa,屈曲率为0.49 mm.
- PUG的改装显著改善了复合样本的偏移.
- 在顶部改装的标本显示线性行为;底部改装的标本显示了两个变形区域.
- FE分析与实验结果密切匹配,预测轻微偏差的屈曲强度 (Ke -4%,最终应力+3%).
结论:
- 聚氨接合剂有效地提高了曲性能,并减少了修复后的混凝土结构的偏移.
- 开发的3D FEM是一种可靠的工具,用于预测NC-PUG复合材料的曲行为.
- 研究结果支持使用PUG作为土木工程应用中的可行的维修材料.
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