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

钢筋混凝土（RC）因其施工方便、原材料易得、整体性好而得到广泛应用。然而，由于机械和环境荷载的作用，钢筋混凝土结构的严重破坏可能导致需要加强以增加功能和延长此类结构的使用寿命。使用纤维增强聚合物（FRP）复合材料与外部粘接（EB）通过环氧树脂粘合剂是快速，有效和可靠的解决方案，以增加弯曲或剪切强度。近年来，纤维增强水泥基（FRCM）加固系统已成为一个可行的替代FRP片材修复钢筋混凝土结构。FRCM系统具有与FRP几乎相同的优点，同时克服了FRP的耐火性。虽然FRCM增强系统的防火性能被广泛认为是优于FRP复合材料的上级，但在文献中很少有出版的作品可以量化这种性能。这些研究还没有达到火灾期间可能经历的高温，因为没有进行实际的火灾测试。此外，火灾后的强度的FRCM加固梁还没有研究。标准火灾试验的数据对于制定设计指南是必不可少的。因此，本研究旨在对织物增强水泥基材料在火灾下的力学性能进行全面的研究。

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.