炭素繊維強化ポリマー(CFRP)シートで補強された鉄筋コンクリート(RC)梁の曲げ性能に対するサイクリック荷重の影響
V S Sujitha1, A Gautham Sriram1, S Raja1
1Center for Advanced Multidisciplinary Research and Innovation, Chennai Institute of Technology, Chennai, Tamil Nadu, 600069, India.
Scientific reports
|January 28, 2026
まとめ
炭素繊維強化ポリマー(CFRP)シートは、鉄筋コンクリート(RC)梁を強化する。シリコーンコーティング炭素繊維ラミネート(SCCFL)は、静的サイクリック荷重下での曲げ補強において、耐荷重能力と疲労抵抗を向上させ、優れた性能を示した。
科学分野:
- 土木工学
- 材料科学
背景:
- 炭素繊維強化ポリマー(CFRP)シートは、高い強度対重量比と耐食性を提供します。
- CFRP材料は、劣化した鉄筋コンクリート(RC)梁の補強にますます使用されています。
研究 の 目的:
- 2種類のCFRPで補強されたRC梁の曲げ性能を実験的に評価すること。
- 静的サイクリック荷重下での炭素繊維布(CFF)とシリコーンコーティング炭素繊維ラミネート(SCCFL)の効果を比較すること。
主な方法:
- 無補強の制御梁と、CFFおよびSCCFLの単層/複層で補強された梁を試験しました。
- 著しい損傷が発生するまで、静的サイクリック荷重(荷重制御)を適用しました。
- 終局荷重容量、荷重-たわみ挙動、エネルギー散逸、亀裂伝播、および剛性低下を評価しました。
主要な成果:
- CFRP補強により、RC梁の公称曲げ強度と疲労抵抗が向上しました。
- SCCFLで補強された梁は、CFFで補強された梁と比較して、より高い耐荷重能力とエネルギー散逸を示しました。
- SCCFLは、静的サイクリック荷重下で、亀裂幅が小さく、剛性の維持率が良好でした。
結論:
- CFRP補強は、RC梁の曲げ性能と疲労抵抗を向上させるのに効果的です。
- SCCFLは、動的または疲労荷重を受けるRC構造物の補修において、CFFよりも効果的です。
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