Fatigue performance study for high strength steel wire in c able-stayed bridge using AE monitoring technology

摘要：

　　In this paper,the fatigue performance of cable-stayed high-strength steel wire is studied.Fatigue properties of new high-strength steel wire,corroded high-strength steel wire and steel wire removed from real bridge are tested respectively.In the fatigue test process,three different monitoring methods,including strain gauge,displacement and acoustic emission signal monitoring,were used comprehensively.After the test,it was found that the acoustic emission sensor can timely and accurately capture the fatigue crack growth signal of the steel wire during the fatigue test.By analyzing this signal,the initiation and propagation process of fatigue cracks can be further analyzed; as the number of fatigue cycles increases,the number of acoustic emission signals to fatigue cracks is also gradually increasing.The amplitude of crack propagation signals obtained before fracture failure of high strength steel wire is about two times of that obtained by fatigue crack growth stage.Based on the monitoring data and fracture analysis,the prediction and location of fatigue failure of high-strength steel wire is carried out.

关键词： fatigue performance cable-stayed high-strength steel wire crack initiation and propagation acoustic emission

作者: C.S.Wang H.P.Si L.Duan B.Yao C.Liu J.Q.Feng

作者单位: Engineering Research Center for Large Highway Structure Safety of Ministry of Education,College of Highways,Changan University,Xian,China

会议类型: 国际会议

会议名称: The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)

会议地点: 青岛

会议语种:英文

页码: 2576-2581

在线出版日期: 2018-07-22（万方平台首次上网日期，不代表论文的发表时间）