Guidelines for Enhancing Fire Endurance of FRP-Strengthened Reinforced Concrete Beams

该项目的目标是开展实验和分析研究，以开发测试数据、验证的数值模型、基于性能的设计指南，以及纤维增强聚合物（FRP）增强钢筋混凝土（RC）梁防火安全设计的实用解决方案。所提出的数值模型将能够考虑高温下的非线性材料特性、不同的火灾场景、不同的FRP和绝缘特性、系统级结构行为和不同的破坏极限状态。该模型将通过一系列frp加固RC梁的耐火试验数据进行验证。提出的模型将提高对火灾和外部荷载下frp加固RC梁的基本理解。经验证的数值模型将用于一系列参数化研究，为frp加固RC梁的防火设计制定合理、经济的指导方针和实用的解决方案。成果包括防火实验数据库、校准的分析工具和方法、提高frp加固RC梁防火性能的实用解决方案，以及研究成果的记录和传播。这项研究将为设计师提供消防安全指南和解决方案，用于新设计，以及使用高性能FRP材料修复和加强老化的基础设施。开发的工具和解决方案将使工程师能够展示可靠的防火结构设计，这是目前建筑业主、居住者、开发商和整个社会的重要议程。计划将研究成果和数据广泛传播给研究人员、从业人员和学生，以便在实践中快速实施设计指南。该计划也将培养研究生成为未来一代的工程师，负责建筑和土木基础设施系统的经济设计，以加强他们的消防安全。

The objective of this project is to conduct experimental and analytical studies to develop test data, validated numerical model, performance-based design guidelines, and practical solutions for fire-safe design of fiber-reinforced polymer (FRP)-strengthened reinforced concrete (RC) beams. The proposed numerical model will be able to account for nonlinear material characteristics at high temperature, different fire scenarios, different FRP and insulation characteristics, system-level structural behavior and different failure limit states. The model will be validated using the test data obtained through a set of fire resistant experiments on FRP-strengthened RC beams. The proposed model will improve fundamental understanding of the FRP-strengthened RC beams under fire and external loading. The verified numerical model will be utilized in a series of parametric studies to formulate rational and cost-effective guidelines and practical solutions for fire design of FRP-strengthened RC beams. Deliverables include database of fire resistance experiments, calibrated analytical tools and approaches, practical solutions for enhancing fire performance of FRP-strengthened RC beams, and documentation and dissemination of research results. This research will provide designers with fire safety guidelines and solutions for their use in the new designs as well as in repair and strengthening of deteriorating infrastructure using high performance FRP materials. The developed tools and solutions will enable engineers to demonstrate robust design of structures for fire, which is now high on the agenda of building owners, occupiers, developers, and society-at-large. The wide dissemination of the research results and data to researchers, practitioners and students is planned for quick implementation of the design guidelines in practice. The project will also train graduate students as the future generation of engineers for economic design of buildings and civil infrastructure systems to enhance their fire safety.