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作者:

Lv, Wenshu (Lv, Wenshu.) | Jia, Junfeng (Jia, Junfeng.) (学者:贾俊峰) | Chen, Xize (Chen, Xize.) | Yao, Xiaofei (Yao, Xiaofei.) | Bai, Yulei (Bai, Yulei.)

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EI Scopus SCIE

摘要:

Ultra-High performance concrete (UHPC) has garnered considerable attention in the construction industry due to its exceptional mechanical properties and durability. In the design of UHPC beams, accurately predicting shear strength is crucial. Inspired by the dense blocks in DenseNet, this paper proposes a novel neural network for predicting the shear strength of UHPC beams. A comprehensive database of UHPC beams was initially established through extensive literature data collection, amassing 619 experimental data samples. Preprocessing was subsequently conducted using mahalanobis distance (DM) to eliminate outliers. Subsequently, the database underwent detailed parameter analysis. In practical testing, the novel neural network model exhibited superior accuracy in predicting the shear strength of UHPC beams, surpassing traditional machine learning (ML) models and empirical formulas. Furthermore, it demonstrated excellent generalization capabilities, achieving an R2 value of 0.988 in the training set and 0.964 in the test set. The study introduced the shapley additive explanations (SHAP) method to conduct global and local interpretability analysis of the network model, demonstrating the contributions of each input parameter to the model predictions. Finally, based on this network model, a graphical user interface (GUI) was developed for researchers engaged in UHPC beam design, enabling users to easily input relevant parameters and obtain shear strength predictions. The findings of this study are expected to promote the application of ML models in predicting the complex nonlinear behavior of UHPC structures, providing strong support for engineering practice.

关键词:

UHPC Construction engineering Machine learning Shapley additive explanations Shear strength Neural network

作者机构:

  • [ 1 ] [Lv, Wenshu]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China
  • [ 2 ] [Jia, Junfeng]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China
  • [ 3 ] [Bai, Yulei]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China
  • [ 4 ] [Chen, Xize]Harbin Inst Technol, Sch Civil Engn, Harbin 150090, Peoples R China
  • [ 5 ] [Yao, Xiaofei]CCCC First Highway Consultants Co Ltd, Xian 710065, Shanxi, Peoples R China

通讯作者信息:

  • [Jia, Junfeng]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China;;

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来源 :

CASE STUDIES IN CONSTRUCTION MATERIALS

ISSN: 2214-5095

年份: 2024

卷: 20

6 . 2 0 0

JCR@2022

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