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.
出处
《科技创新与应用》
2023年第26期56-60,65,共6页
Technology Innovation and Application
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
bridge and tunnel engineering
in-service bridge
bridge reinforcement
prestressed concrete
load test
carbon fiber sheet
finite element
