复合材料科学与工程Issue(10)：72-78,7.DOI:10.19936/j.cnki.2096-8000.20241028.010
玻璃纤维增强聚合物筋增强混凝土柱的轴压承载力评估
Axial compression capacity evaluation of concrete columns reinforced with glass fiber reinforced polymer bars
摘要
Abstract
The influence of glass fiber reinforced polymer(GFRP)bars on the axial compression capacity of concrete columns is crucial.To thoroughly evaluate the performance of GFRP bars in strengthening concrete col-umns,prediction models for the load-bearing capacity were established using the Random Forest(RF),Artificial Neural Network(ANN),AdaBoost,and XGBoost algorithms.A database containing experimental data from 256 GFRP-reinforced concrete columns was created.The existing theoretical formulas for the axial compression capacity of GFRP-reinforced concrete columns were preliminarily evaluated,and the predictive accuracy of the RF,ANN,AdaBoost,and XGBoost models for the axial compression capacity of GFRP-reinforced concrete columns was further analyzed.The results showed that the determination coefficient of the existing theoretical formulas for the axial com-pression capacity of GFRP-reinforced concrete columns(around 0.70)was lower than that of the RF model(0.82),AdaBoost model(0.80),and XGBoost model(0.80).Moreover,the average absolute error and root mean square error were generally higher for the existing theoretical formulas compared to the RF,ANN,AdaBoost,and XGBoost models,indicating that the accuracy of the existing theoretical formulas was inferior to that of the RF,ANN,AdaBoost,and XGBoost models.In comparison to the ANN model,the RF,AdaBoost,and XGBoost models could accurately evaluate the actual axial compression capacity performance of GFRP-reinforced concrete columns,especially the RF model.This research provides a reference for the axial compression capacity design and analysis when designing GFRP bars for strengthening concrete structures.关键词
玻璃纤维增强聚合物筋/混凝土柱/轴压承载力/复合材料/随机森林Key words
glass fiber reinforced polymer bar/concrete column/axial compression capacity/composites/ran-dom forest分类
通用工业技术引用本文复制引用
冉黎,吴文,周磊..玻璃纤维增强聚合物筋增强混凝土柱的轴压承载力评估[J].复合材料科学与工程,2024,(10):72-78,7.基金项目
国家自然科学基金(52027812) （52027812）
重庆市教育委员会(Z213135) （Z213135）
