基于试验与数值模拟的在役PC连续梁桥碳纤维布加固效果分析  

作　　者：蒋洁 李鹏程 段美栋 孙玉 宋晓东 

机构地区：[1]山东高速股份有限公司,济南250014 [2]山东省交通科学研究院,济南250100 [3]东南大学交通学院,南京211189

出　　处：《科技创新与应用》2023年第26期56-60,65,共6页Technology Innovation and Application

摘　　要：为了研究碳纤维布对在役预应力混凝土连续梁桥的加固效果,选取梁体有U形缝的桥跨和无缝的对比跨进行现场试验和数值计算。结果表明,粘贴碳纤维布加固对于开裂结构的刚度提升效果非常有限,不适用于开裂结构在正常使用状态下的刚度提升,也不适用于未开裂结构的预防性加固,但可以通过抑制裂缝开展提高开裂结构的耐久性。In order to study the strengthening effect of carbon fiber sheet on in-service prestressed concrete continuous beam bridge,the bridge span with U-shaped joint and seamless contrast span are selected for field test and numerical calculation.The results show that the strengthening effect of bonded carbon fiber sheet on the stiffness of cracked structures is very limited,and it is not suitable for the stiffness improvement of cracked structures in normal use,nor is it suitable for the preventive reinforcement of uncracked structures.However,the durability of cracked structures can be improved by restraining cracks.

关 键 词：桥梁与隧道工程 在役桥梁 桥梁加固 预应力混凝土 荷载试验 碳纤维布 有限元 

分 类 号：U445.72[建筑科学—桥梁与隧道工程]