Durability of Reinforced Concrete Members Wrapped with FRP Fabrics

FRP织物包裹钢筋混凝土构件的耐久性

• 批准号: 9612162
• 负责人: Hota GangaRao
• 金额: $ 30.27万
• 依托单位: West Virginia University Research Corporation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-05-01 至 2002-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9612162&HistoricalAwards=false
• 关键词: Durability; Reinforced; Concrete; Members; Wrapped

9612162 GangaRao The major objectives of this research are: 1) to establish the enhancement of static bending and shear strength, and stiffness of steel reinforced concrete members wrapped and resin (adhesively) bonded with several layers of FRP fabrics referred herin as HYBRIDS including failure modes, and 2) to evaluate long term strength and stiffness degradation rates of these hybrids under harsh environments such as moisture and temperature fluctuation, sustained stresses, and chemical reactions. A fundamental understanding of degradation and failure mechanisms is essential for core concrete, skin with FRP fabric, and the adhesives before implementing the proposed repair techniques for the existing infrastructure that is in disarray. The degradation rates of adhesives and other materials will be established through accelerated testing in a weatherometer. The test results will be evaluated through a parallel research effort to establish the expected service- life performance of hybrids. This research will be coordinated with another parallel effort to be funded by the West Virginia Department of Transportation-Division of Highways, The Composite Institute- SPI, and the Tonen Corporation of Japan. ***

9612162 GangaRao本研究的主要目标是：1）建立了提高钢筋混凝土构件静弯、抗剪强度和刚度的外包和树脂（1）与多层FRP织物（此处称为混合物）粘合，包括失效模式，以及2）评估这些杂化材料在恶劣环境（例如湿度和温度波动、持续应力和化学反应）下的长期强度和刚度退化速率。 在对现有混乱的基础设施实施拟议的修复技术之前，对核心混凝土、FRP织物蒙皮和粘合剂的退化和失效机制有一个基本的了解是必不可少的。 粘合剂和其他材料的降解速率将通过老化试验仪中的加速试验确定。 测试结果将通过平行研究工作进行评估，以确定混合动力车的预期使用寿命性能。 这项研究将与另一项平行的工作相协调，该工作将由西弗吉尼亚州交通部高速公路司、复合材料研究所（SPI）和日本东念公司资助。 ***