简单的FRP预应力用于加强RC梁:使用分析方法进行实验研究
Gokhan Sakar1, Huseyin Kursat Celik2
1Department of Civil Engineering, Dokuz Eylul University, İzmir 35210, Türkiye.
Polymers
|June 27, 2025
概括
用纤维增强聚合物 (FRP) 强化钢筋混凝土 (RC) 梁,特别是用固和预应力,可以显著提高负载能力,高达45%. 这项研究验证了用于预测梁行为的分析模型,增强了结构强化策略.
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:
- 钢筋混凝土 (RC) 梁通常需要加强以满足现代负载需求或修复损坏.
- 纤维增强聚合物 (FRP) 为提高混凝土元件的结构性能提供了一个可行的解决方案.
- 了解FRP增强,固和预应力的综合作用对于有效的结构改造至关重要.
研究的目的:
- 研究纤维增强聚合物 (FRP) 加强在钢筋混凝土 (RC) 梁上的有效性.
- 评估各种参数的影响,如层层宽度,层层数量,定和预应力对光束性能的影响.
- 开发和验证一种分析模型,用于预测强化RC梁的负载位移反应.
主要方法:
- 在三点曲下造和测试九个RC光束样本.
- 使用一种新型,手动操作的简易预应力机 (EPM) 可施加高达10%的预应力.
- 开发基于曲率增量和材料非线性性的分析方法,以预测负载移位行为.
主要成果:
- 加固FRP,特别是通过固和预应力,使承载能力提高了高达45%.
- 定和预应力有效地减少了过早解结,预应力对债券性能和负载能力产生了更大的影响.
- 拟议的分析模型与实验结果有很强的一致性,大多数标本的皮尔森相关系数超过90%.
结论:
- 开发的分析模型准确地预测了FRP增强RC梁的行为.
- 结合FRP, anchorage和预应力使用,是提高RC光束容量和耐久性的最佳策略.
- 预压特别有效地提高了债券绩效,并减轻了FRP强化混凝土结构中的解压问题.
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