Please use this identifier to cite or link to this item:
Title: Damage detection in long suspension bridges using stress influence lines
Authors: Chen, ZW
Zhu, SY 
Xu, YL 
Li, Q
Cai, QL
Issue Date: 2015
Source: Journal of bridge engineering, 2015, v. 20, no. 3, 5014013
Abstract: Numerous long-span cable-supported bridges have been built throughout the world in recent years. These bridges begin to deteriorate once built and continuously accumulate damage during their long service life. The growing popularity of comprehensive structural health monitoring systems (SHMSs) in recently built long-span bridges has started a new trend of integrating SHMS and damage detection technology for real-time condition assessment of these bridges. This paper explores a novel damage detection technique based on stress influence lines (SILs) of bridge components and validates the efficacy of the technique through a case study of the Tsing Masuspension bridge. A mathematical regularization method is first introduced to identify SILs based on the in situ measurement of train information and train-induced stress responses in local bridge components. Good agreement between the identified and baseline SILs demonstrates the effectiveness of the proposed identification method. Damage indexes based on SILs are subsequently proposed and applied to hypothetical damage scenarios in which one or two critical bridge components are subjected to severe damage. The comparison suggests that the first-order difference of SIL change is an accurate indicator of the damage location. Results of this study indicate that the proposed SIL-based method offers a promising real-time technique for damage localization in long-span cable-supported bridges equipped with comprehensive SHMSs.
Keywords: Stress
Suspension bridges
Influence line (IL)
Structural health monitoring (SHM)
Damage detection
Moving load
Publisher: American Society of Civil Engineers
Journal: Journal of bridge engineering 
ISSN: 1084-0702
EISSN: 1943-5592
DOI: 10.1061/(ASCE)BE.1943-5592.0000681
Appears in Collections:Journal/Magazine Article

View full-text via PolyU eLinks SFX Query
Show full item record


Last Week
Last month
Citations as of Sep 3, 2020


Last Week
Last month
Citations as of Sep 11, 2020

Page view(s)

Last Week
Last month
Citations as of Sep 15, 2020

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.