Article
Construction & Building Technology
Cailong Ma, Sixuan Wang, Jianping Zhao, Xufeng Xiao, Chenxi Xie, Xinlong Feng
Summary: The purpose of this paper is to develop a data and mechanism co-driven model for predicting the shear strength of reinforced concrete (RC) deep beams. A total of 457 RC deep beams with or without web reinforcements are included in the experimental database, and 9 key input features are determined based on the shear mechanism. Six machine-learning models and five mechanism models are compared, and the XGBoost model outperforms others in terms of prediction accuracy and generalization ability. The interpretability of the XGBoost model is enhanced by combining the Shapley additive explanation (SHAP) approach and the proposed interpretable approach based on the shear mechanism. The proposed interpretable approach is validated qualitatively and quantitatively against other mechanism models, demonstrating its recommendation for similar shear issues of RC members.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Ahmad Tarawneh, Abdullah Alghossoon, Eman Saleh, Ghassan Almasabha, Yasmin Murad, Mahmoud Abu-Rayyan, Ahmad Aldiabat
Summary: This study evaluates design shear models for FRP-RC beams and develops accurate design models using gene expression programming. The proposed models demonstrate high accuracy for slender beams and simplicity for deep beams compared to other models. The deep beams model provides a simple method.
Article
Chemistry, Multidisciplinary
Zhenjun Li, Xi Liu, Dawei Kou, Yi Hu, Qingrui Zhang, Qingxi Yuan
Summary: A new method for determining the shear strength of RC deep beams was proposed using a statistical approach. The Bayesian-MCMC method was used to establish a new shear prediction model and improve existing deterministic models. The Gibbs sampling technique was applied to solve the high dimensional integration problem and determine optimal model parameters. The proposed model showed improved accuracy and continuity compared to experimental results.
APPLIED SCIENCES-BASEL
(2023)
Article
Construction & Building Technology
Trung Kien Nguyen, Ngoc Tan Nguyen
Summary: This study investigates the structural behavior and shear capacity of corroded deep beams without shear reinforcement, confirming the impact of corrosion on load-carrying capacity and load-transferring mechanism of the beams. The parametric study shows that sufficient anchorage provisions can significantly improve the load-carrying capacity of the beams, while the shear span-to-depth ratio and corrosion degree do not always have adverse effects on the failure mode and shear resistance mechanism of the beams.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2021)
Article
Engineering, Civil
Bo Song, Liu Jin, Jiangxing Zhang, Xiuli Du
Summary: This study investigates the influence of horizontal reinforcement and shear-span ratio on the shear behavior of basalt fiber reinforced polymer (BFRP-RC) deep beams with web reinforcement. Sixteen specimens were tested by considering the beam depth and shear-span ratio as variables. The results indicate that the increase of shear-span ratio reduces the nominal ultimate shear strength of the beams, and the nominal ultimate shear strength declines by about 46% as the beam depth increases from 300 mm to 1200 mm.
ENGINEERING STRUCTURES
(2023)
Article
Multidisciplinary Sciences
Aref A. Abadel, Abdulrahman S. Albidah
Summary: The study experimentally investigated the effect of alternative shear reinforcement schemes on the shear performance of deep beams, showing that the proposed schemes significantly increased shear capacity and improved post-peak behavior and ductility of the beams. The use of steel fiber reinforced concrete in combination with inverted U-shape angles and steel bars produced prolonged stable inelastic behavior and equivalent ultimate shear resistance compared to traditional stirrups.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2021)
Article
Construction & Building Technology
Yassir M. Abbas, Ahmet Tuken, Nadeem A. Siddiqui
Summary: This study investigates the role of steel fibers in improving the structural behavior and shear capacity of shear-deficient deep reinforced concrete beams, and proposes an optimum quantity of steel fibers for achieving the desired safety level. The results show that steel fibers can significantly enhance the ductility, crack pattern, shear strength, load-displacement behavior, and reliability level of shear-deficient deep beams.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Engineering, Civil
Ye Li, Hui Chen, Wei-Jian Yi, Fei Peng, Zhe Li, Yun Zhou
Summary: The testing and analysis of eight reinforced concrete deep beams without shear reinforcement revealed the formation of tied-arch action after the formation of diagonal cracks. Significant size effects were observed in relation to the depth and concrete strength, with proposed fracture mechanics based coefficients to consider this effect in strut-and-tie models. The results also indicated the best prediction accuracy with a refined strut-and-tie model, with an average value and coefficient of variation of the tested-to-predicted shear strength ratio being 1.00 and 17.8%, respectively.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Civil
Amal Wahbi, Duc Toan Pham, Ghazi Hassen, Denis Garnier, Patrick de Buhan
Summary: The upper bound kinematic approach is used for the design of RC beams subjected to various loadings, optimizing strength conditions through a simple virtual collapse mechanism.
ENGINEERING STRUCTURES
(2021)
Article
Polymer Science
Binbin Zhou, Ruo-Yang Wu, Shiping Yin
Summary: This paper proposes an innovative stress field-based analytical approach to assess the failure strength of end concrete cover separation in RC beams strengthened with external FRP reinforcement. The conventional plane-section analysis is extended to evaluate the carrying capacity of FRP-strengthened RC beams. The proposed approach considers the dowel action of reinforcement, the induced concrete splitting, and the interaction between concrete, steel, and FRP. It also considers the arrangement of steel and FRP reinforcement, cracking status of concrete, and its softening effect to predict the occurrence of concrete cover separation and related debonding failure modes.
Article
Construction & Building Technology
Zhiheng Hu, Yingwu Zhou, Biao Hu, Xiaoxu Huang, Menghuan Guo
Summary: This paper investigates the use of engineered cementitious composite (ECC) to enhance the shear strength and deformability of reinforced concrete (RC) beams. The inclusion of ECC in the compression zone significantly increased both the shear strength and deformability of the beams. The crack width and pattern, the variation trends of shear strength contribution, and the deformation proportion were all affected by the inclusion of ECC.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Mao-Yi Liu, Zheng Li, Hang Zhang
Summary: This paper proposes a probabilistic prediction approach for the shear strength of reinforced concrete deep beams based on machine learning algorithms. The NGBoost model, trained on a collected database, achieves higher accuracy in shear strength prediction and provides reliable confidence intervals.
Article
Engineering, Civil
Ju Dong Lee, John B. Mander
Summary: A shear strength analysis model called TAMU was proposed for shear-critical RC beams with transverse reinforcement. The model simplified the C-STM and showed good agreement with test results from 460 RC beam tests. The TAMU approach may be a viable improvement for analyzing shear-critical RC beams.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Gia Toai Truong, Kyoung-Kyu Choi, Tri-Hai Nguyen, Chang-Soo Kim
Summary: In this study, a BO-XGBoost hybrid model was developed using the XGBoost and BO algorithms to predict the shear strength of deep beams more accurately. The proposed model showed the highest prediction accuracy compared to other models and existing design equations. A parametric study revealed the critical factors affecting the shear strength of deep beams. Additionally, a stand-alone application program was developed for the convenience of utilizing the proposed model.
EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
(2023)
Article
Engineering, Civil
Linh Van Hong Bui, Chanakan Klippathum, Tosporn Prasertsri, Pitcha Jongvivatsakul, Boonchai Stitmannaithum
Summary: The structural performance of reinforced concrete beams strengthened in shear with embedded through-section glass fiber-reinforced polymer bars is investigated experimentally and analytically. The results indicate that the shear capacity and stiffness of the beams are enhanced by applying ETS-GFRP, increasing concrete strength, and decreasing shear span-to-effective depth ratio.
JOURNAL OF COMPOSITES FOR CONSTRUCTION
(2022)