在三点曲下用补丁增强的梁的行为:实验调查
Fatima Benaoum1, Foudil Khelil1, Abdelghani Baltach2
1Mechanical Engineering Department, University of Mascara, Mascara 29000, Algeria.
Polymers
|November 27, 2025
概括
碳纤维增强聚合物 (CFRP) 补丁显著提高了混凝土梁的曲性能. 用CFRP修复破裂梁可以恢复和提高负载能力,改变故障模式从脆性到柔性.
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
背景情况:
- 混凝土结构经常遭受曲损伤,损害其结构完整性.
- 外接钢筋是损坏的混凝土元素的常见修复技术.
研究的目的:
- 评估碳纤维增强聚合物 (CFRP) 补丁在恢复和增强可控损坏的混凝土梁的柔性性能方面的有效性.
- 量化修复混凝土梁的承载能力恢复和故障模式变化.
主要方法:
- 在三点曲测试中, prismatic 混凝土梁在未破裂,未破裂强化,破裂未修复和破裂修复的条件下进行了三点曲测试.
- 通过不同深度 (7,21和35毫米) 的中间间隙,引入了先前存在的损伤.
- 碳纤维增强聚合物 (CFRP) 补丁应用于梁的张力面.
主要成果:
- 用CFRP补丁修复破裂的混凝土梁,与未修复的梁相比,最大负载能力增加了240%以上.
- 故障模式从未修复的梁中的脆剪转到修复的梁中的柔性曲故障.
- 用CFRP强化未破裂梁也显示出了显著的性能改善.
结论:
- 补丁型CFRP钢筋在恢复和增强混凝土梁的屈曲性能方面非常有效,即使存在重大先前损坏.
- 该研究提供了定量数据,以根据现有裂的严重程度来指导选择适当的CFRP维修水平.
- 碳复合材料维修为延长混凝土结构的使用寿命和提高混凝土结构的安全性提供了可行的解决方案.
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