Working procedures derived from lessons learned on bridge inspections using terrestrial laser scanners

E. H. Wang, K. T. Chang, M. C. Chen, C. Y. Wang, C. S. Chen

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Bridges are important public assets and need periodic inspection. Excessive deformation or damages occurring at the main load-carrying members frequently raise concerns and detailed inspections are scheduled according to the judgment of field investigators. It is desirable to measure overall spatial information in a short period of time in order for decision makers to prevent disaster. To propose a standard procedure at routine bridge inspections using three-dimensional (3-D) laser scanners, the research team designed 3 full-scale tests to streamline equipment setup, data acquisition, precision assessment and the post-processing program. The final results suggest that 3-D laser scanners showing high-precision measuring capacity are suitable for and capable of obtaining 3-D measurements as required in a short time. The technology should be promoted for use during routine inspections of bridges to acquire the displacement information of critical structural elements for rapid safety evaluations. This paper proposes a working procedure summarizing lessons learned in the test program.

Original languageEnglish
Pages (from-to)63-78
Number of pages16
JournalLasers in Engineering
Issue number1-2
StatePublished - 2011


  • Bridge inspection
  • Disaster prevention
  • Engineering surveying
  • Structural deformation
  • Terrestrial laser scanning (TLS)


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