使用GFRECC改装技术加强结构缺陷和部分损坏的短方形柱子
P Ruba1, G V Vigneshpandian1, P Bhuvaneshwari2
1School of Civil Engineering, SASTRA Deemed University, Thanjavur, Tamilnadu, 613401, India.
Scientific reports
|September 29, 2025
概括
这项研究表明,玻璃纤维增强工程混凝土复合材料 (GFRECC) 有效地修复和改造结构弱的混凝土柱. GFRECC显著提高了钢筋混凝土元素的承载能力,刚性和能量吸收.
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:
- 结构弱的钢筋混凝土柱在基础设施中构成重大风险.
- 现有的维修方法可能无法完全恢复或提高柱子的性能.
- 工程混凝土复合材料为结构改造提供了先进的材料特性.
研究的目的:
- 研究玻璃纤维增强工程水泥复合材料 (GFRECC) 在修复和改造短方形钢筋混凝土柱的有效性.
- 评估GFRECC对缺陷柱的最终负载能力,刚性,能量吸收和柔性的影响.
- 为了验证,将实验结果与数值模型进行比较.
主要方法:
- 造和测试了8个短方形钢筋混凝土柱 (100毫米×100毫米×1000毫米),包括控制,低强度,不充分的钢筋和不足的侧绑样本.
- 在最初的破裂后,用于修复和改装的GFRECC是聚烯纤维和E-glass rovings在水泥基质中的复合材料.
- 使用ANSYS 14.0创建和分析数值模型,以模拟修复的列的行为.
主要成果:
- 随着GFRECC的改装,不够强化的柱子和不足的侧的最终负载能力显著提高,与控制柱相比,增加了2.36-2.52倍.
- 实验柱的硬度模块增加了14.19%,达到114.06%,数值模型的硬度模块增加了19.95%至120.5%.
- 能量吸收和可塑性显著改善,能量可塑性提升在实验中从15.7%到77.36%不等.
结论:
- GFRECC是修复和改造缺陷钢筋混凝土柱的高效材料.
- 复合材料显著改善了关键的结构性能指标,包括负载能力,刚性和能量吸收.
- 有效的接和额外的包装层对于最大限度地利用GFRECC在结构修复中的好处至关重要.
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