Health checks through landmark bridges to sky-high structures

Yiqing Ni, K. Y. Wong, Yong Xia

Research output: Journal article publicationJournal articleAcademic researchpeer-review

89 Citations (Scopus)


Massive infrastructure projects developed in Hong Kong make for big challenges and unique opportunities for engineers and researchers. The construction of the cables-stayed Stonecutters Bridge sets up a new landmark in the bridge engineering community, with its main span exceeding 1,000 m as well as its sophisticated instrumentation system comprising more than 1,500 sensors. The development of structural health monitoring (SHM) technology has evolved for over 10 years in Hong Kong since the implementation of the so-called "Wind And Structural Health Monitoring System (WASHMS)" on the suspension Tsing Ma Bridge in 1997. The successful engineering paradigms of implementing and operating SHM systems for five cable-supported bridges and experiences gained by practice and research in the past decade have promoted the applications of this technology beyond Hong Kong and extending from long-span bridges to high-rise structures. In this paper, the evolution in the design methodology for SHM systems, the advancement in several aspects of SHM technology, and a performance comparison between the early implemented and lately developed SHM systems for large-scale bridges are first outlined. Subsequently, the concept of the so-called "life-cycle structural health monitoring (LSHM)" is addressed by exploring the integration of in-construction monitoring and in-service monitoring and by realizing such an integrated system to a super-tall tower structure. The issue on how an SHM system benefits structural vibration control is also discussed.
Original languageEnglish
Pages (from-to)103-119
Number of pages17
JournalAdvances in Structural Engineering
Issue number1
Publication statusPublished - 1 Feb 2011


  • high-rise structures
  • integration of health monitoring
  • life-cycle structural health monitoring
  • long-span bridges
  • vibration control

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction


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