Applicability study of distributed optical fiber sensors for long-term monitoring of long-span PC cable-stayed bridge

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  • 長大PC斜張橋の長期モニタリングに向けた分布型光ファイバセンサの適用性に関する研究
  • チョウダイ PC シャチョウキョウ ノ チョウキ モニタリング ニ ムケタ ブンプガタ ヒカリ ファイバセンサ ノ テキヨウセイ ニ カンスル ケンキュウ

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Abstract

Applicability study of distributed optical fiber sensors to use long-term monitoring of long-span PC cable-stayed bridge was described. Distributed optical strain and temperature sensors were newly developed for embedding into the pre-stressed concrete (PC) structure. The fundamental characteristics and estimated lifetime were confirmed. Both strain and temperature of the girder were measured by simplex optical fiber measurement equipment. Effectiveness of distributed optical fiber sensor and measurement were introduced as a practical engineering use through the shape analysis of the girder during under construction phase and bridge operation term.

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