Abstract
The behavior of reinforced concrete (RC) deep beams is complex and difficult to predict due to factors such as compressive and shear stress and beam geometry. To address this challenge, researchers have proposed various machine learning models such as Artificial Neural Network, Decision Tree, Support Vector Machine, Adaptive Boosting, Extreme Gradient Boosting, Random Forest, Gradient Boosting, and Voting Regressor. In this study, the authors evaluated the performance of these models in predicting shear strength of RC deep beams by using metrics such as \(R^{2}\), Mean Squared Error, Root Mean Squared Error, Mean Absolute Percentage Error and Mean Absolute Error. Furthermore, the authors optimize the ensemble learning models using customized hyperparameters. The XGBoost model exhibited the highest accuracy with an \(R^{2}\) value of 0.92 and the least model error, with MAE of 29.65 and RMSE of 47.76 and MAPE of 9.79.The authors compared these models with mechanics-driven models from different country codes including the United States, China, Europe, British (CIRIA), Canada and found that ensemble learning models, specifically XGBoost, outperformed mechanics-driven models. The authors used an explainable machine learning (EML) technique called SHapley Additive exPlanations (SHAP) to gain additional insights into the developed XGBoost model. The outcomes of feature selection and SHAP analysis suggest that the grade of concrete and beam geometry predominantly influence the prediction of shear strength in RC deep beams, whereas steel properties exert minimal impact in this regard.










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The datasets generated during and analyzed during the current study are available from the corresponding author on reasonable request.
Abbreviations
- AI:
-
Artificial intelligence
- ML:
-
Machine learning
- RC:
-
Reinforced concrete
- ACI:
-
American Concrete Institute
- DT:
-
Decision tree
- SVM:
-
Support vector machines
- ANN:
-
Artificial neural networks
- MAE:
-
Mean absolute error
- RMSE:
-
Root mean squared error
- MAPE:
-
Mean absolute percentage error
- GBRT:
-
Gradient boosting regression tree
- RF:
-
Random forest
- SHAP:
-
Shapley additive explanations
- SHM:
-
Structural health monitoring
- EML:
-
Explainable machine learning
- ACI:
-
American Concrete institute
- WOR:
-
Without web reinforcements
- WHR:
-
Horizontal web reinforcement
- WVR:
-
Vertical web reinforcements
- WHVR:
-
Both horizontal and vertical web reinforcement
- TENN:
-
Transfer ensemble neural network
- \(l_{0}\) :
-
Beam span
- h :
-
Height
- \(h_{0}\) :
-
Effective height
- b :
-
Width
- a :
-
Span
- \(\rho _{l}\) :
-
Reinforcement ratio
- \(f_{y l}\) :
-
Reinforcement strength
- \(\rho _{\textrm{h}}\) :
-
Horizontal reinforcement ratio
- \(s_{\textrm{h}}\) :
-
Horizontal reinforcement spacing
- \(f_{y \textrm{h}}\) :
-
Horizontal reinforcement strength
- \(\rho _{\textrm{v}}\) :
-
Vertical reinforcement ratio
- \(s_{\textrm{v}}\) :
-
Vertical reinforcement spacing
- \(f_{y \textrm{v}}\) :
-
Vertical reinforcement strength
- \(f_{\textrm{c}}^{\prime }\) :
-
Concrete strength
- \(V_{u}\) :
-
Shear strength
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AT: conceptualisation, methodology, software, validation, investigation, writing the original draft. AKG: conceptualisation, methodology, formal analysis, supervision, review and editing. TG: comparison with mechanics-driven models of CIRIA, the US, Canada, China and European Union, review and editing.
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Tiwari, A., Gupta, A.K. & Gupta, T. A robust approach to shear strength prediction of reinforced concrete deep beams using ensemble learning with SHAP interpretability. Soft Comput 28, 6343–6365 (2024). https://doi.org/10.1007/s00500-023-09495-w
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DOI: https://doi.org/10.1007/s00500-023-09495-w