Sensing Fatigue Damage in Steel Bridges Using Strain-based Skin Sensor Networks
Strain-based structural health monitoring(SHM)is effective for damage detection as it can directly sense abrupt surface strain changes caused by structural damage.In this paper,we report our recent investigations of a novel strain-based sensing skin,termed soft elastomeric capacitor(SEC),for monitoring fatigue cracks in steel bridges.The SEC is a large-area and flexible capacitance-based strain sensor,capable of measuring up to 20%linear strain change over a large area,hence can potentially serve as an ideal candidate for monitoring cracks over large structural surfaces.Two experimental validations are reported in this paper including: 1)a small-scale experimental investigation of the SECs crack sensing ability under high-cycle fatigue loading; and 2)a large-scale experimental validation to monitor distortion-induced fatigue cracks using an array of SECs.Results in this paper indicate the SEC technology can successfully monitor fatigue crack growth in laboratory settings,showing its potential to provide a practical long-term fatigue monitoring solution for field applications.
structural health monitoring strain-based damage detection distortion-induced fatigue cracks steel bridges capacitive sensing skin
Jian Li Xiangxiong Kong Caroline Bennett William Collins Hongki Jo Jong-Hyun Jeong Simon Laflamme
Department of Civil,Environmental & Architectural Engineering,University of Kansas,Lawrence,KS,USA Department of Civil Engineering and Engineering Mechanics University of Arizona,Tucson,AZ,USA Department of Civil,Construction,and Environmental Engineering,Iowa State University,Ames,IA,USA;Dep
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
2703-2709
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）