Damage detection at web/flange junction of welded I-section steel beam based on impact-optic technique
Welded I-section steel members are widely used in engineering,and it is prone to fatigue damage at the web/flange junction under cyclic load.Due to the sudden damage and the heavy losses,it is necessary to detect the damage in time.Based on the study of stress wave propagation mechanism in steel beam,a broadband impact wave is generated by a hammer striking on the surface of a steel I-beam,and the fiber interferometer is attached to the surface of steel beam to receive the stress wave signal.By analyzing the impact echo signal spectrum with FFT,the existence and location of the damage is determined.Experimental results show that it is feasible to detect the damage at the flange/web junction of the steel I-beam by impact-optic method.
impact-echo fiber interferometer frequency spectrum broadband impact wave fatigue damage
Ying Xu Li Niu Ming Xie
ShenZhen Key Lab of Urban & Civil Engineering Disaster Prevention & Reduction,Harbin Institute of Technology Shenzhen Graduate School,Shenzhen 518055,China
国际会议
The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)
青岛
英文
2405-2413
2018-07-22(万方平台首次上网日期,不代表论文的发表时间)