土木工程用FRP材料的疲劳性能研究

FRP材料的疲劳性能一直是对该材料研究的薄弱点。综合国外的研究成果，简述与分析了FRP材料的疲劳失效模式、基于能量的疲劳失效准则。同时，对FRP片材根据临界面概念和能量理论进行了疲劳失效分析，并阐述了疲劳寿命的预测方法；对FRP筋材的疲劳性能，根据相关试验结果，分析了应力水平、平均应力、温度、加载频率、缠绕丝形式等对FRP筋材疲劳性能有影响的主要因素。

Research of the Fatigue Performance of FRP Material Applied in Civil Engineering

The performance of FRP materials under cyclic loading has always been the weak point of associate study. In this passage, FRP fatigue failure mode and energy-based fatigue failure criteria were depicted with the guidance of studies from abroad. The fatigue failure analysis of FRP laminates was also presented according to the critical plane concept and failure criteria theory based on energy, while the fatigue life was predicted. Of the FRP rods, this passage interpreted the prominent factor of stress level, mean stress, temperature, load frequency, wrapping of helical fibres which have effect on fatigue performances of FRP bars.