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Localization and quantification of partial cable damage in the long‐span cable‐stayed bridge using the abnormal variation of temperature‐induced girder deflection
Author(s) -
Wang Gaoxin,
Ye Jihong
Publication year - 2019
Publication title -
structural control and health monitoring
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.587
H-Index - 62
eISSN - 1545-2263
pISSN - 1545-2255
DOI - 10.1002/stc.2281
Subject(s) - deflection (physics) , structural engineering , girder , finite element method , engineering , stiffness , physics , optics
Summary The cable damage is one serious problem to endanger the bridge safety. Considering that current methods of estimating cable damage still have some shortcomings during their application, this paper introduced one new method to localize and quantify the partial cable damage using the abnormal variation of temperature‐induced girder deflection caused by cable damage. First, the monitoring correlation between girder deflection and uniform temperature is analyzed using the monitoring temperature and deflection data. Second, the abnormal variations of temperature‐induced girder deflection and cable force are deeply researched through finite element simulation. Third, the correlation between girder deflection and cable force is mechanically modeled, and furthermore, the method of localizing and quantifying partial cable damage is put forward. Specifically, the envelope curve is created to localize the broken stay cable, and the damage indicator is used to quantify the partial damage in the broken stay cable. Furthermore, the influence of two parameters (viz., the environmental noise and sensor quantity) on the localization and quantification accuracy is discussed. Overall, the results show that the proposed method is feasible to localize and quantify the partial cable damage.