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環状GFRPチューブ限定コンクリートショートコラムの火災後の軸向圧縮行動
Yiwei Tang1, Liu Yang1, Ni Zhang1
1Yangtze University College of Arts and Sciences, Jingzhou 434020, China.
Materials (Basel, Switzerland)
|February 13, 2026
まとめ
この研究では,ガラス繊維強化ポリマー (GFRP) のチューブで囲まれたコンクリートの短い柱を,熱にさらされた後に調べました. 高温は容量を大幅に低下させ,性能低下は200°C以上で加速する.
科学分野:
- 土木工学 土木工学とは
- マテリアルサイエンス 材料科学
- 構造工学 構造工学とは
背景:
- ガラス繊維強化ポリマー (GFRP) 管内コンクリート (CFGCT) コラムは,構造性能を向上させます.
- 高い温度にさらされた後の彼らの行動を理解することは,火災の安全性にとって非常に重要です.
研究 の 目的:
- 高温曝露後のCFGCT短柱の残余軸圧縮行動を実験的に調査する.
- GFRPの壁の厚さ,温度,および使用期間が残存容量に及ぼす影響を分析する.
- 火災後の軸の容量削減のための予測モデルを開発する.
主な方法:
- 27 CFGCT標本の製造と軸圧縮試験を行いました.
- 標本を60分,120分間,100°C,150°C,200°C,300°Cの温度にさらす.
- GFRP壁の厚さ (5,8,10 mm) を考慮したパラメトリック研究.
主要な成果:
- CFGCTコラムは,熱にさらされた後に2段階の負荷移動反応と脆性障害を示した.
- 高温により,残留軸積力と初期硬さが著しく低下し,特に200°C以上は減少した.
- GFRPの壁の厚さは故障モードに影響を及ぼし,温度持続時間 (60-120分) は限られた影響を及ぼしました.
結論:
- 温度は,火災曝露後のCFGCTの性能を低下させる主な要因です.
- 回帰モデルは,火災後の軸性容量減少因子 (Kr) を正確に予測します.
- 発見は,CFGCTメンバーの耐火設計と火災後の安全評価を裏付けている.
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