Damage detection of long-span bridges using stress influence lines incorporated control charts

Zhi Wei Chen, Qin Lin Cai, Ying Lei, Songye Zhu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

25 Citations (Scopus)


Numerous long-span bridges have been built throughout the world in recent years. These bridges are progressively damaged by continuous usage throughout their long service life. The failure of local structural components is detrimental to the performance of the entire bridge, furthermore, detecting the local abnormality at an early stage is difficult. This paper explores a novel damage detection method for long-span bridges by incorporating stress influence lines (SILs) in control charts, and validates the efficacy of the method through a case study of the Tsing Ma Suspension Bridge. Damage indices 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 study suggests that the first-order difference of SIL change is an accurate indicator for location of the damage. To some extent, different levels of damage can be quantified by using SILs incorporating with X-bar control chart. Results of this study indicate that the proposed SIL-based method offers a promising technique for damage detection in long-span bridges.
Original languageEnglish
Pages (from-to)1689-1697
Number of pages9
JournalScience China Technological Sciences
Issue number9
Publication statusPublished - 1 Jan 2014


  • control chart
  • damage detection
  • long-span bridges
  • stress influence line
  • structural health monitoring

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)


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