Structural performance assessment of GFRP elastic gridshells by machine learning interpretability methods

作     者：Soheila KOOKALANI Bin CHENG Jose Luis Chavez TORRES Soheila KOOKALANI;Bin CHENG;Jose Luis Chavez TORRES

作者机构：Department of Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240China Department of Civil EngineeringTechnical University of LojaLoja 110102Ecuador 

出 版 物：《Frontiers of Structural and Civil Engineering》 (结构与土木工程前沿（英文版）)

年 卷 期：2022年第16卷第10期

页      面：1249-1266页

核心收录：

学科分类：0711[理学-系统科学] 08[工学] 081104[工学-模式识别与智能系统] 0714[理学-统计学（可授理学、经济学学位）] 0811[工学-控制科学与工程] 0701[理学-数学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：The research work was supported by the National Natural Science Foundation of China(Grant No.51978400) the National Key Research and Development Program of China(No.2021YFE0107800).The support is gratefully acknowledged. 

主　　题：machine learning gridshell structure regression sensitivity analysis interpretability methods 

摘      要：The prediction of structural performance plays a significant role in damage assessment of glass fiber reinforcement polymer(GFRP)elastic gridshell structures.Machine learning(ML)approaches are implemented in this study,to predict maximum stress and displacement of GFRP elastic gridshell structures.Several ML algorithms,including linear regression(LR),ridge regression(RR),support vector regression(SVR),K-nearest neighbors(KNN),decision tree(DT),random forest(RF),adaptive boosting(AdaBoost),extreme gradient boosting(XGBoost),category boosting(CatBoost),and light gradient boosting machine(LightGBM),are implemented in this study.Output features of structural performance considered in this study are the maximum stress as f1(x)and the maximum displacement to self-weight ratio as f2(x).A comparative study is conducted and the Catboost model presents the highest prediction accuracy.Finally,interpretable ML approaches,including shapely additive explanations(SHAP),partial dependence plot(PDP),and accumulated local effects(ALE),are applied to explain the predictions.SHAP is employed to describe the importance of each variable to structural performance both locally and globally.The results of sensitivity analysis(SA),feature importance of the CatBoost model and SHAP approach indicate the same parameters as the most significant variables for f1(x)and f2(x).