Accelerate Alliance Investigation of Fire Performance of Concrete Beams Strengthened with FRCM

钢筋混凝土（RC）因其施工方便、原材料可及性好、整体性好等优点而得到广泛应用。然而，由于机械和环境载荷，RC结构的严重破坏可能导致需要加强以增加功能并延长此类结构的使用寿命。使用纤维增强聚合物（FRP）复合材料外粘接（EB）通过环氧胶粘剂是快速，有效，可靠的解决方案，以提高弯曲或剪切强度。近年来，纤维增强胶凝基质（FRCM）加固系统已成为FRP板修复钢筋混凝土结构的可行替代方案。FRCM系统几乎具有FRP的所有优点，同时克服了FRP的耐火性能受损。虽然FRCM增强系统的防火性能被广泛认为优于FRP复合材料，但在文献中很少有发表的作品来量化这种性能。这些研究没有达到火灾中可能经历的高温，因为没有进行实际的火灾测试。此外，frp加固梁的火灾后强度尚未得到研究。来自标准防火试验的数据对于制定设计指南至关重要。因此，本研究旨在对织物增强胶凝基质（FRCM）在火灾下的力学性能进行全面研究。

Reinforced concrete (RC) is widely used due to its ease of construction, accessibility of raw materials, andexcellent integrity. However, severe breakdown of RC structures due to mechanical and environmental loadsmay result in the need for strengthening to increase functionality and extend the service life of such structures.The use of fibre-reinforced polymer (FRP) composites with external bonding (EB) through epoxy adhesive is afast, effective, and reliable solution to increase flexural or shear strength. In recent years, fabric-reinforcedcementitious matrix (FRCM) strengthening systems have emerged as a viable alternative to FRP sheets forrehabilitating reinforced concrete structures. FRCM systems present almost all of the same benefits as FRPwhile overcoming the compromised fire resistance of FRP. While the fire performance of FRCM strengtheningsystems is widely viewed as superior to that of FRP composites, very few published works are available in theliterature to quantify this performance. These studies have not reached high temperatures that can beexperienced during a fire because the actual fire tests were not conducted. Also, the post-fire strength of theFRCM-strengthened beams has not been studied. The data from standard fire tests are essential for developingdesign guidance. This research, therefore, aims to conduct a comprehensive study on the mechanicalperformance of fabric-reinforced cementitious matrix (FRCM) under fire.