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

本项目的目标是进行试验和分析研究，为纤维增强聚合物(FRP)加固的钢筋混凝土(RC)梁的火灾安全设计开发试验数据、经过验证的数值模型、基于性能的设计指南和实用解决方案。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失效极限状态。通过一组FRP加固钢筋混凝土梁的抗火试验，对模型进行了验证。该模型将加深对火灾和外荷载作用下FRP加固钢筋混凝土梁的基本认识。经过验证的数值模型将被用于一系列的参数研究，以制定合理的、经济有效的指导方针和实用的解决方案，FRP加固钢筋混凝土梁的火灾设计。交付成果包括耐火实验数据库、校准的分析工具和方法、增强FRP加固RC梁的耐火性能的实用解决方案，以及研究成果的记录和传播。这项研究将为设计者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玻璃钢材料修复和加固日益老化的基础设施。开发的工具和解决方案将使工程师能够展示耐火结构的稳健设计，这现在是建筑物业主、居住者、开发商和整个社会的重要议程。计划向研究人员、从业人员和学生广泛传播研究结果和数据，以便在实践中迅速实施设计准则。该项目还将培养研究生作为下一代工程师，进行建筑和民用基础设施系统的经济设计，以提高其消防安全。

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.