基于核密度估计和XGBoost的FRP-RC板块的穿孔切削强度的可解释的预测模型
Sheng Zheng1, Tianyu Hu2, Nima Khodadadi3
1Shanghai Urban Construction Vocational College, Shanghai, 201415, China.
Scientific reports
|December 31, 2024
概括
这项研究开发了一个准确的XGBoost模型来预测纤维增强聚合物 (FRP) 增强混凝土 (RC) 板块的穿孔切割强度,从而改进了结构设计. 该模型通过核密度估计进行了增强,显示了高精度,并将板块深度确定为关键因素.
科学领域:
- 土木工程 土木工程是指土木工程.
- 材料科学 材料科学 材料科学
- 结构工程 结构工程
背景情况:
- 钢筋混凝土 (RC) 板块在建筑中至关重要,但受到柱子连接处穿孔剪切强度的限制.
- 现有的方法,如钢,纤维和纤维增强聚合物 (FRP),旨在增强这种强度.
- 当前的设计规范不充分预测FRP-RC板块的穿孔剪切强度.
研究的目的:
- 开发一个强大而准确的预测模型,用于FRP-RC板块的穿孔剪切强度.
- 改进结合FRP-RC板块的复合结构的分析和设计.
- 将拟议模型的性能与现有的基于代码和研究人员模型进行比较.
主要方法:
- 采集并增强了189个实验数据集,使用内核密度估计 (KDE) 来解决数据稀缺问题.
- 使用XGBoost.构建了一个穿孔切削强度预测模型.
- 通过SHapley添加式扩展 (SHAP) 进行模型可解释性分析.
主要成果:
- 内核密度估计显著提高了XGBoost模型的准确性和稳定性.
- XGBoost实现了高性能指标:R平方的0.99 (培训) 和0.96 (测试).
- 有效的板材深度被确定为最关键的因素,与穿孔切削强度成正比.
结论:
- 开发的XGBoost模型比目前的代码更准确地预测FRP-RC板块冲孔切削强度.
- 该研究为FRP-RC复合元件的结构设计提供了宝贵的指导.
- 增强的数据增强和机器学习为预测结构性表现提供了有前途的方法.
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