摘要
在FRP加固混凝土梁的剥离破坏中,由弯曲裂缝引起的剥离破坏是其中的一种主要形式,对于被加固梁中FRP片材与混凝土的协同工作能力有很大影响。通过纤维增强复合材料的桥联力模型,揭示了这种状况下弯曲裂缝发展的断裂阻力性能以及桥联力对FRP片材与混凝土之间的协调工作性能的影响。
To effectively utilize fiber reinforced plastic(FRP) plates(or sheets) in strengthening civil infrastructures,a design strategy integrating the properties of FRP reinforcement and composite structural behavior needs to be adopted. The bridge stress behavior should be considered to be one of the most important effects on the concrete beam strengthened by FRP. The behaviors were introduced to solve the nonlinear interfacial stress transfer and fracture propagation problems for mechanical character of FRP strengthened concrete beam. Expressions for the driven force,the resistance and the slope of them are derived analytically. In addition,numerical simulations were performed to discuss the factors influencing the interfacial and theoretical derivations were validated.
出处
《建筑结构》
CSCD
北大核心
2016年第S2期456-462,共7页
Building Structure
关键词
FRP
混凝土结构
桥联力
剥离破坏
断裂力学
FRP
concrete structure
bridge stress
peeling-off failure
fracture mechanics
