Applications of naked optical fiber Bragg grating and fiber optic impact hammer in bridge model test

Sheng Zhan, Hwa Yaw Tam, You Lin Xu, Ho Yin Au, Xiao Hua Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)


The members of a long span suspension bridge model are often very small due to scaled size reduction. The large sensors are thus not allowed to be installed on the model in consideration that the additional mass, stiffness and damping will affect the test results, especially in dynamic tests. In this experimental investigation, the naked optical fiber Bragg grating sensors were used to measure the strain of hanger ropes of 0.5 mm diameter and other small members. In order to obtain the transfer function of strain to an exciting force, a fiber optic impact hammer was developed. The strain mode shapes of the bridge model were measured. The results obtained from the tests can be used as references for structural health monitoring of the prototype bridge. Furthermore, some experiences obtained from the tests are presented in this paper.
Original languageChinese (Simplified)
Pages (from-to)103-108
Number of pages6
JournalGongcheng Lixue/Engineering Mechanics
Issue number3
Publication statusPublished - 1 Mar 2011


  • Fiber optic impact hammer
  • Model test
  • Naked optical fiber grating
  • Strain mode.
  • Transfer function

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials

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