Durability of Reinforced Concrete Members Wrapped with FRP Fabrics

9612162 GangaRao本研究的主要目标是：1)建立多层FRP布包裹和树脂粘结的型钢混凝土构件的静弯曲和剪切强度以及刚度的提高方法，包括破坏模式；2)评估这些混杂材料在恶劣环境下的长期强度和刚度退化速率，如湿度和温度波动、持续应力和化学反应。在对混乱的现有基础设施实施拟议的修复技术之前，对核心混凝土、FRP织物表层和粘合剂来说，对退化和失效机制的基本了解是至关重要的。粘合剂和其他材料的降解率将通过在气象仪中进行加速测试来确定。测试结果将通过一项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。这项研究将与西弗吉尼亚州交通部-高速公路部、综合研究所-SPI和日本东能公司资助的另一项平行工作进行协调。***

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. ***