An experimental evaluation of impact force on a fiber Bragg grating-based device for debris flow warning

Shaojie Zhang, Changxue Xu, Jiang Chen, Jun Jiang

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Conventional sensors for debris flow monitoring suffer from several drawbacks including low service life, low reliability in long-distance data transfer, and stability in severe weather conditions. Recently, fiber Bragg grating (FBG)-based sensors have been developed to monitor debris flows. However, they can be easily damaged by the impact forces of boulders within debris flow. This paper presents a new FBG-based device to measure the strain induced by the impact force of debris flow with high reliability and effectiveness. The effects of the impact forces of debris flows have been investigated. Then, the relationship between the strain and the debris flow energy correlating with the damage to building structures has been established. It is shown that this new FBG-based device is capable of monitoring and warning about debris flows.

Original languageEnglish
Pages (from-to)65-73
Number of pages9
JournalLandslides
Volume16
Issue number1
DOIs
StatePublished - Jan 18 2019

Keywords

  • Debris-flow monitoring
  • Fiber Bragg grating
  • Impact force

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