Damage detection in beam-like structures using deflections obtained by modal flexibility matrices
In bridge structures,damage may induce an additional deflection which may contain essential information about the damage.In this paper,a new load concept,so called the positive-bending-inspectionload(PBIL)is proposed to construct a simple inverse mapping from the damage-induced deflection to the actual damage location.A PBIL of an inspection region is defined as a load or a system of loads which guarantees bending moment to be positive within the inspection region.A novel damage localization method is proposed based on the damage-induced chord-wise deflection,which was proven to have a maximum value with an abrupt change in its slope at a damage location under a PBIL.Experimental verification has been carried out on a two-span continuous bridge model with a steel box-girder.The proposed method identified the damage location for relatively small damage cases of 12％ reduction in the bending rigidity at a point with a narrow cut.
Beam-like Structures deflection-based damage detection modal flexibility positive bending inspection loads
K.Y. Koo C.B. Yun J.J. Lee D.S. Hong J.T. Kim
Korea Advanced Institute of Science & Technology,Daejeon,Korea Sejong University,Seoul,Korea Pukyung University,Busan,Korea
国际会议
The World Forum on Smart Materials and Smart Structures Technology(SMSST07)(2007年世界智能材料与智能结构技术论坛)
重庆·南京
英文
2007-05-01（万方平台首次上网日期，不代表论文的发表时间）