EFFECT OF SALT CORROSION ON FATIGUE BEHAVIOR OF BFRP TENDONS

摘要：

　　Basalt fiber-reinforced polymer(BFRP)tendon is a promising prestressing component for marine engineering.However,the fatigue behavior of BFRP tendons in marine environment is still unclear.This paper studies the fatigue behavior of BFRP tendons after aged in a salt solution by temperature-accelerated experiments.The degradation is analyzed and discussed in terms of fatigue strength.The degradation mechanism is clarified based on the failure mode and the scanning electron microscopy(SEM)analysis.The results show that BFRP tendons maintain a fatigue strength higher than 0.52 fu after aged in salt solution.The fatigue strength degradation of BFRP tendons is controlled by the weakened fiber-matrix interface resulting from the hydrolyzation of Si-O-Si chemical bonds in salt solution.SEM shows that specimens aged at 55 ℃ for 63 days demonstrate significant corrosion.The results provide guidance for the fatigue design of BFRP tendons in a marine environment.

关键词： BFRP tendons fatigue salt corrosion mechanism

作者: Jianzhe Shi Lining Ding Xin Wang Zhishen Wu

作者单位: International Institute for Urban Systems Engineering,Southeast University,Nanjing,210096,China School of Civil Engineering,Nanjing Forestry University,Nanjing 210037,China

会议类型: 国际会议

会议名称: the Sixth Asia-Pacific Conference on FRP in Structures (APFIS2017)(第六届亚太纤维增强复合材料结构工程国际会议暨第十届全国建设工程FRP应用学术交流会)

会议地点: 新加坡

会议语种:英文

页码: 1-5

在线出版日期: 2017-07-19（万方平台首次上网日期，不代表论文的发表时间）