钢,GFRP,BFRP和混合增强梁的弹性测试
Yazeed Elbawab1, Youssef Elbawab1, Zeina El Zoughby1
1The American University in Cairo, New Cairo 11835, Egypt.
Polymers
|August 14, 2025
概括
玻璃纤维增强聚合物 (GFRP) 和玄武岩纤维增强聚合物 (BFRP) 与钢相比,在混凝土梁中提供更高的承载能力和更低的屈曲. 混合系统增强了柔性,使其适用于地震应用.
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:
- 混凝土中的钢筋钢筋容易腐蚀,需要使用替代材料.
- 玻璃纤维增强聚合物 (GFRP) 和玄武岩纤维增强聚合物 (BFRP) 提供高拉伸强度和耐腐蚀性.
- 非腐蚀性钢筋对于耐用和可持续的建筑而言至关重要.
研究的目的:
- 评估用GFRP,BFRP和混合系统增强的混凝土梁的弹性性能.
- 为了比较负载能力,柔性和故障模式与传统钢筋.
- 评估FRP增强件适用于苛刻的结构应用的适用性.
主要方法:
- 建造了12个混凝土梁,并用GFRP,BFRP,钢和混合系统加强.
- 梁根据ACI 440.1R-15指南进行了三点曲试验.
- 分析了屈曲强度,屈曲,能量吸收和故障机制.
主要成果:
- 与钢相比,GFRP和BFRP梁的最终负载能力分别高出8%和12%.
- 在GFRP和BFRP梁中,故障时的曲率明显较低 (38%和58%低于钢).
- 混合动力增强器提高了负载能力7-17%并减少了曲率11-58%.
结论:
- 在混凝土梁中,GFRP和BFRP提供了增强的曲性能,在承载能力和刚性方面超过了钢.
- 混合增强系统提供了一个平衡的方法,提高承载能力和柔性.
- BFRP梁通过解接/压碎而失败,而GFRP梁通过条形破裂而失败,表明了不同的故障模式. 推混合系统用于易受地震和冲击的结构.
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