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A platform for research: civil engineering, architecture and urbanism
CROSS SECTIONAL REDUCTION RATE ESTIMATION METHOD AND LOAD RESISTANCE FORCE ESTIMATION METHOD
To quantitatively obtain a cross sectional reduction rate of a steel bar on the basis of a behavior of an expansion strain with corrosion of a steel bar in an actual structure.SOLUTION: A cross sectional reduction rate estimation method for estimating a reduction rate of a cross section of a steel material, which is reduced by corrosion of a steel material, includes the steps for: fixing an optical fiber sensor to a front surface of a steel material; detecting a characteristic change of a light wave to be propagated in the optical fiber sensor so as to detect a strain of a steel material due to generation of a corrosion product; and estimating a cross sectional reduction rate of a steel material corresponding to the detected strain through the use of a predetermined function indicating a relation between a cross sectional reduction rate of a steel material and a strain by corrosion expansion of a steel material.SELECTED DRAWING: Figure 5
【課題】実構造物の鉄筋の腐食にともなう膨張ひずみの挙動に基づいて、鉄筋の断面減少率を定量的に把握する。【解決手段】鋼材が腐食することによって減少した鋼材の断面の減少率を推定する断面減少率推定方法であって、前記鋼材の表面に光ファイバセンサを固定させる工程と、前記光ファイバセンサ中を伝搬する光波の特性変化を検出することによって、腐食生成物の発生による前記鋼材のひずみを検出する工程と、鋼材の断面減少率と鋼材の腐食膨張によるひずみとの関係を示す予め定められた関数を用いて、前記検出したひずみに対応する鋼材の断面減少率を推定する工程と、を含むことを特徴とする。【選択図】図５
CROSS SECTIONAL REDUCTION RATE ESTIMATION METHOD AND LOAD RESISTANCE FORCE ESTIMATION METHOD
To quantitatively obtain a cross sectional reduction rate of a steel bar on the basis of a behavior of an expansion strain with corrosion of a steel bar in an actual structure.SOLUTION: A cross sectional reduction rate estimation method for estimating a reduction rate of a cross section of a steel material, which is reduced by corrosion of a steel material, includes the steps for: fixing an optical fiber sensor to a front surface of a steel material; detecting a characteristic change of a light wave to be propagated in the optical fiber sensor so as to detect a strain of a steel material due to generation of a corrosion product; and estimating a cross sectional reduction rate of a steel material corresponding to the detected strain through the use of a predetermined function indicating a relation between a cross sectional reduction rate of a steel material and a strain by corrosion expansion of a steel material.SELECTED DRAWING: Figure 5
【課題】実構造物の鉄筋の腐食にともなう膨張ひずみの挙動に基づいて、鉄筋の断面減少率を定量的に把握する。【解決手段】鋼材が腐食することによって減少した鋼材の断面の減少率を推定する断面減少率推定方法であって、前記鋼材の表面に光ファイバセンサを固定させる工程と、前記光ファイバセンサ中を伝搬する光波の特性変化を検出することによって、腐食生成物の発生による前記鋼材のひずみを検出する工程と、鋼材の断面減少率と鋼材の腐食膨張によるひずみとの関係を示す予め定められた関数を用いて、前記検出したひずみに対応する鋼材の断面減少率を推定する工程と、を含むことを特徴とする。【選択図】図５
CROSS SECTIONAL REDUCTION RATE ESTIMATION METHOD AND LOAD RESISTANCE FORCE ESTIMATION METHOD
断面減少率推定方法および耐荷力推定方法
HAYANO HIROYUKI (author) / OCHIAI TAKAO (author) / SHIRODE MAYA (author) / ERIGUCHI REI (author)
2019-07-04
Patent
Electronic Resource
Japanese
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