疲劳荷载下FRP粘结系统的性能

Performance of FRP Bonding Systems Under Fatigue Loading

研究和比较疲劳荷载下,纤维增强复合材料和混凝土各种粘结系统粘结性能。FRP粘结系统包括外部粘结FRP,表面嵌入粘结FRP,纤维锚固FRP以及最近发展起来的混杂粘结FRP系统。在两种力学参数不变的情况下,对5组混杂粘结FRP系统进行了研究。为达到研究的目的,改进了双剪粘结试验(直接拉出试验)。通过疲劳和单调试验,对破坏机制、荷载-位移曲线以及应变进行分析,探讨了荷载大小和循环周期对粘结性能的影响。基于试验结果,根据疲劳粘结性能对不同粘结系统的优缺点进行论述。

This study investigates and compares the behavior of the bond between fiber reinforced polymer (FRP) materials and concrete in various bonding systems under fatigue conditions. The FRP bond systems studied include externally bonded FRP (EB-FRP), near-surface mounted FRP (NSM-FRP), fiber anchored FRP (FB-FRP), and a newly developed hybrid bonded FRP system (HB-FRP). In the HB-FRP system, the mechanical fastener was fixed in two conditions, and five groups of bonding systems were studied. To achieve the objec...