一个新的基于Avrami的指数模型用于预测纤维增强聚合物条的使用寿命:与使用大型数据库的现有模型进行比较
Tuanjie Wang1, Abdul Ghani Razaqpur2, Shaoliang Chen3
1Henan Engineering Technology Research Center of Industrial Waste Gypsum Application, School of Architecture and Civil Engineering, Zhengzhou University of Industrial Technology, Zhengzhou 451150, China.
Polymers
|November 9, 2024
概括
基于Avrami方程的新修改指数 (MEP) 模型可靠地预测了纤维增强聚合物 (FRP) 条的使用寿命. 这种模型比现有方法更准确,用于评估混凝土结构中FRP条的耐用性.
科学领域:
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
- 聚合物科学 聚合物科学
背景情况:
- 在混凝土中,钢筋腐蚀对耐用性构成重大挑战.
- 纤维增强聚合物 (FRP) 条为钢提供了耐腐蚀的替代品.
- 准确的使用寿命预测模型对于FRP棒应用至关重要.
研究的目的:
- 提出一种新的修改指数 (MEP) 模型来评估FRP棒的使用寿命.
- 通过使用综合数据集,对MEP模型与现有模型的可靠性进行评估.
- 引入一个综合统计标准,用于增强模型性能评估.
主要方法:
- 基于Avrami方程的MEP模型的开发.
- 编制一个大型数据库 (903个数据点,74个测试组) 的FRP条加速测试结果.
- 使用根平均平方误差 (RMSE),平均绝对误差 (MAE) 和确定系数 (R2) 的比较分析.
主要成果:
- 与实证指数模型,单对数模型,双对数模型和功率函数模型相比,MEP模型显示出更高的可靠性.
- 综合统计标准 (RMSE,MAE,R2) 改善了对模型性能的评估,而不仅仅是R2.
- 与其他模型相比,MEP模型对数据误差的敏感性较小,提供更稳定的预测.
结论:
- 基于Avrami方程的MEP模型提供了一个可靠的框架来预测FRP棒的使用寿命.
- 拟议的综合标准增强了对模型准确性和可靠性的评估.
- MEP模型提供了一个更可靠的工具来评估FRP条在混凝土结构中的长期耐用性.
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