摘 要：结合甘肃省某桥梁旧桥加固工程实例，研究了预应力CFRP板加固技术的特点、设计方案及施工工艺。工程实践及试验结果表明: CFRP板结构力学性能稳定，材料缺陷较少，便于施工；应用预应力CFRP板技术加固桥梁，结构承载力满足加固设计要求，且加固后恢复部分挠曲变形，梁底裂缝闭合,承重构件刚度提高，桥梁结构内力分布得到明显改善。
Application Research of Pre-stressed CFRP Plate in Reinforced
Concrete T Beam Reinforcement Engineering
( Xi’an Highway Research Institute，Xi’an 710065，China)
Abstract: Based on the example of the reinforcement project of the Jiuquan Beidahe bridge, the characteristics, design scheme and construction technology of pre-stressed CFRP plate reinforcement technology were studied Engineering practice and test results showed that CFRP plate had stable mechanical properties, less material defects and was easily constructed Pre-stressed CFRP plate technology was used to reinforce the bridge The structural bearing capacity of which meeted the reinforcement design requirements, and the part of the flexural deformation was restored after reinforcement, the crack was closed; the rigidity of the load-bearing member was improved, and the internal force distribution of the bridge structure was significantly improved.
key words: bridge reinforcement; Jiuquan Beidahe bridge; pre-stressed CFRP plate; construction technology; engineering application