U.S.-Egypt Cooperative Research: Effect of Elevated Temperature and Fire on Structural Elements Retrofitted by Carbon Fiber Reinforced Polymer Composites

美国-埃及合作研究：高温和火灾对碳纤维增强聚合物复合材料改造结构元件的影响

• 批准号: 0425699
• 负责人: D Reddy
• 金额: --
• 依托单位: Florida Atlantic University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-09-01 至 2008-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0425699&HistoricalAwards=false
• 关键词: U.S.; Egypt; Cooperative; Research; Effect

0425699ReddyDescription: This award is to support a cooperative research between Dr. V D Reddy and Dr. Khaled Sobhan, Department of Civil Engineering, Florida Atlantic University, Boca Raton, Florida and Dr. Hala M. El-Kady, Department of Civil Engineering, National Research Center, Cairo, Egypt. They plan to study the effect of elevated temperature and fire on structural elements retrofitted by carbon fiber reinforced polymer composites. Retrofitting structures using new materials such as Carbon Fiber Reinforced Polymer Composites (CFRPs) has recently gained increased trust and confidence by practicing engineers due to their properties. There is, however, little available information on the performance of these structures when exposed to fire conditions. Unlike regular steel and concrete members, the FRP as a material is generally combustible, and may even alter the fire characteristics. Therefore, correct assessment of the fire resistance of CFRP retrofitted structures is one of the important safety concerns for design engineers involved with the structural application of FRP materials. There is a growing interest to investigate the fire effects on numerous retrofitted structures using externally bonded CFRP laminates or near surface mounted CFRP bars. The PIs will conduct experimental and analytical investigations for evaluating the effects of fire exposure on the properties of structural elements retrofitted by CFRP as recommended by the American Concrete Institute committee. Different protection methods for CFRP material such as the application of rich mortar covers, using near surface mounted CFRP techniques, etc. will be evaluated. Analytical modeling will be performed, and the results will be compared with the experimental results. The conclusions will lead to recommendations and guidelines to designers and practicing engineers for using CFRP in retrofitting reinforced concrete structures with adequate fire resistance. Scope and broader impacts: This research is of mutual interest to both institutions, as the Egyptian researcher has worked earlier at FAU to investigate the dynamic characteristics of CFRP cables. Both partners recognized the importance of extending the combined effort to investigate the effect of fire on structures retrofitted with CFRP. The project has a strong educational impact because the junior scientists from Egypt and the graduate students from the U.S. involved with the project will have the opportunity to learn and participate in the counterpart's research activities through exchange visits and active collaboration. A concerted effort will be made to hire undergraduate minority students for assistance in the testing program. Since infrastructure safety and security is a major consideration in the post 9/11 era, fire resistance of structural materials will be an important new topic of study and research for FAU students. In addition, the acquisition of a fire furnace will enable inclusion of new undergraduate laboratory experiments for concrete and civil engineering materials courses. This project is being supported under the US-Egypt Joint Fund Program, which provides grants to scientists and engineers in both countries to carry out these cooperative activities.

该奖项旨在支持佛罗里达州博卡拉顿佛罗里达大西洋大学土木工程系的V D Reddy博士和Khaled Sobhan博士以及埃及开罗国家研究中心土木工程系的Hala M. El-Kady博士之间的合作研究。他们计划研究高温和火灾对碳纤维增强聚合物复合材料改造的结构元件的影响。使用碳纤维增强聚合物复合材料（CFRPs）等新材料进行结构改造，由于其性能，最近获得了执业工程师越来越多的信任和信心。然而，很少有关于这些结构暴露在火灾条件下的性能的可用信息。与普通的钢和混凝土构件不同，FRP作为一种材料通常是可燃的，甚至可能改变火灾特性。因此，正确评估碳纤维增强塑料（CFRP）加固结构的耐火性能是设计工程师对FRP材料结构应用的重要安全问题之一。有越来越多的兴趣来研究火灾对许多使用外部粘结CFRP层压板或近表面安装CFRP筋的改造结构的影响。根据美国混凝土协会委员会的建议，pi将进行实验和分析调查，以评估火灾对CFRP改造结构元件性能的影响。CFRP材料的不同保护方法，如应用丰富的砂浆覆盖，使用近表面安装CFRP技术等将被评估。将进行解析建模，并将结果与实验结果进行比较。这些结论将为设计师和执业工程师提供建议和指南，以使用CFRP对具有足够耐火性能的钢筋混凝土结构进行改造。范围和更广泛的影响：这项研究对两个机构都有好处，因为埃及研究人员早些时候曾在FAU研究CFRP电缆的动态特性。双方都认识到扩大共同努力的重要性，以调查火灾对CFRP改造结构的影响。该项目具有很强的教育影响，因为参与该项目的埃及青年科学家和美国研究生将有机会通过互访和积极合作来学习和参与对方的研究活动。将采取协调一致的努力，聘请本科少数民族学生协助测试计划。由于基础设施的安全和安保是后911时代的主要考虑因素，结构材料的防火性将是FAU学生学习和研究的一个重要的新课题。此外，购置一座火炉将使混凝土和土木工程材料课程纳入新的本科实验室实验。该项目得到了美国-埃及联合基金项目的支持，该项目向两国的科学家和工程师提供赠款，以开展这些合作活动。