Mathematical models for assessment of the safety of steel beams based on average strains from long gage optic sensors

Hyo Seon Park, Hyun Seok Jung, Yun Han Kwon, Ji Hyun Seo

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Most fiber optic sensors are point sensors that can measure the strain only at a local point of a beam, although strain distribution is non-uniform along the length of a beam. Long gage fiber optic sensors that measure integrated strain over a relatively long length can consider strain variation. This type of sensor was found to be efficient and useful for monitoring large-scale structures. On the other hand, the maximum strain in a beam cannot be measured with long gage optic sensors; the safety of a steel beam is analyzed by a comparison between the maximum stress measured during monitoring and the allowable stress of the beam calculated by a design code. Therefore, in this paper, simple mathematical models are presented for the determination of the maximum values of strains or stresses in a beam based on the average strains measured by long gage optic sensors. The model was tested in an experiment by comparing the maximum strain directly obtained from electrical gages and the calculated maximum strain from long gage optic sensors.

Original languageEnglish
Pages (from-to)109-113
Number of pages5
JournalSensors and Actuators, A: Physical
Volume125
Issue number2
DOIs
Publication statusPublished - 2006 Jan 10

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Steel
Gages
Optics
mathematical models
safety
steels
optics
Mathematical models
sensors
Sensors
fiber optics
Fiber optic sensors
strain distribution
Monitoring

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering

Cite this

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abstract = "Most fiber optic sensors are point sensors that can measure the strain only at a local point of a beam, although strain distribution is non-uniform along the length of a beam. Long gage fiber optic sensors that measure integrated strain over a relatively long length can consider strain variation. This type of sensor was found to be efficient and useful for monitoring large-scale structures. On the other hand, the maximum strain in a beam cannot be measured with long gage optic sensors; the safety of a steel beam is analyzed by a comparison between the maximum stress measured during monitoring and the allowable stress of the beam calculated by a design code. Therefore, in this paper, simple mathematical models are presented for the determination of the maximum values of strains or stresses in a beam based on the average strains measured by long gage optic sensors. The model was tested in an experiment by comparing the maximum strain directly obtained from electrical gages and the calculated maximum strain from long gage optic sensors.",
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Mathematical models for assessment of the safety of steel beams based on average strains from long gage optic sensors. / Park, Hyo Seon; Jung, Hyun Seok; Kwon, Yun Han; Seo, Ji Hyun.

In: Sensors and Actuators, A: Physical, Vol. 125, No. 2, 10.01.2006, p. 109-113.

Research output: Contribution to journalArticle

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