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

0425699 Reddy描述：该奖项是为了支持佛罗里达州博卡顿市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Hala M博士之间的合作研究。El-Kady，埃及开罗国家研究中心土木工程系。 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（CFRP）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的信任和信心。然而，很少有关于这些结构在火灾条件下的性能的可用信息。与普通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CFRP加固结构的耐火性能是FRP材料结构应用设计工程师关注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贴CFRP层压板或近表面安装CFRP杆的加固结构的影响。 PI将进行实验和分析调查，以评估火灾暴露对美国混凝土学会委员会推荐的CFRP加固结构元件性能的影响。将评估CFRP材料的不同保护方法，例如应用富砂浆覆盖层，使用近表面安装CFRP技术等。将进行分析建模，并将结果与实验结果进行比较。结论将导致建议和指导方针，设计师和执业工程师使用碳纤维加固钢筋混凝土结构具有足够的耐火性能。 范围和更广泛的影响：这项研究是共同感兴趣的两个机构，埃及研究人员曾在FAU早些时候调查碳纤维增强塑料电缆的动态特性。 两个合作伙伴都认识到扩大共同努力的重要性，以调查火灾对碳纤维增强塑料改造结构的影响。 该项目具有很强的教育影响，因为参与该项目的埃及初级科学家和美国研究生将有机会通过互访和积极合作学习和参与对方的研究活动。将作出共同努力，雇用本科少数民族学生在测试计划的援助。由于基础设施的安全和保障是后9/11时代的一个主要考虑因素，结构材料的耐火性将是FAU学生学习和研究的一个重要新课题。 此外，购置一个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-埃及联合基金方案的支持，该方案向两国的科学家和工程师提供赠款，以开展这些合作活动。

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.