Article
Construction & Building Technology
Huazhe Jiao, Xi Chen, Yixuan Yang, Xinming Chen, Liuhua Yang, Tongyi Yang
Summary: This study investigates the effects of basalt fiber (BF) and polymers on the performance of fiber concrete through experiments, scanning, and simulations. The results indicate that the fiber primarily influences the compressive and flexural strength of concrete, while the polymer affects the tensile strength of the fibers. Additionally, the addition of BF admixture improves the microstructure of concrete and enhances the adhesion between BF and the concrete matrix.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Polymer Science
Ning Jiang, Xintao Zhao, Mingdao Wang, Mengdi Li, Junteng Li
Summary: This paper focuses on modeling the water absorption and internal stress behavior of steel/rubber composites. A three-dimensional finite element model is established to accurately simulate water diffusion, and the outcomes show that the early water diffusion conforms to the Fickian model while the weight gain follows the Langmuir model due to the presence of bound water. The internal stress caused by differential swelling between steel and rubber is revealed and quantitatively analyzed, contributing to the understanding of damage initiation in steel/rubber composites.
Article
Construction & Building Technology
Junlin An, Yong Yu, Zuquan Jin, Ning Li, Dongxian Shen, Chuansheng Xiong
Summary: In this study, rubber particles were added to steam-cured concrete to reduce its water absorption capacity. The results showed that rubber particles could prevent strength decrease and reduce the capillary water absorption coefficient in steam-cured concrete. NaOH and SCA modification methods introduced new functional groups on the surface of rubber particles, reducing their contact angles and improving hydrophilicity.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Jun Xu, Chen Peng, Guihua Wang, Peng-gang Wang
Summary: This study simulated the ion migration process of electrochemical chloride extraction (ECE) in self-healing concrete and analyzed the effects of cracks, self-healing properties, and different self-healing rates on ECE efficiency. The research will have a positive impact on the study of ECE.
STRUCTURAL CONCRETE
(2022)
Article
Engineering, Civil
Jie Wei, Jun Li, Chengqing Wu, Hong Hao, Jian Liu
Summary: This study investigates the effectiveness of using ultra-high performance concrete (UHPC) to enhance the impact resistance of reinforced concrete (RC) structures. Mechanical tests were conducted to evaluate the properties of UHPC. Impact tests were performed on beams with and without UHPC strengthening. The results showed that UHPC jackets improved the structural impact resistance, reducing deflection and changing the failure mode. Finite element analysis and parametric studies were also conducted to further examine the dynamic response and evaluate the effect of different parameters.
ENGINEERING STRUCTURES
(2023)
Article
Computer Science, Interdisciplinary Applications
Fei Zhou, Vahab Sarfarazi, Hadi Haeri, Mohammad Hosein Soleymanipargoo, Jinwei Fu, Mohammad Fatehi Marji
Summary: The study found that tensile cracks were the dominant mode in the modeled samples. Wing cracks initiated from the joint tips when the joints interacted in a position lower than that of the tunnel height. The stability of the tunnel can be maintained when the joint interacting with the tunnel head has a negative interaction angle.
COMPUTERS AND CONCRETE
(2021)
Article
Construction & Building Technology
Anita Ogrin, Igor Planinc, Sebastjan Bratina
Summary: This paper introduces a novel family of finite elements for analyzing tensile failure of reinforced concrete bars, with results independent of the mesh. By excluding discrete cracks from FE equations and introducing additional boundary conditions, the location, number, and propagation of cracks are guaranteed to be independent of the FE mesh.
ADVANCES IN STRUCTURAL ENGINEERING
(2022)
Article
Mechanics
Johannes Reiner, Xiaodong Xu, Navid Zobeiry, Reza Vaziri, Stephen R. Hallett, Michael R. Wisnom
Summary: A virtual finite element framework is proposed to simulate fiber-dominated damage behavior in composite laminates under tensile loading, transitioning from high fidelity to computationally efficient models. The effectiveness of the nonlocal continuum damage model CODAM2 in predicting structural response in large-scale tests is demonstrated through comparison with high fidelity models and experimental data.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Mechanical
Sakdirat Kaewunruen, Hao Fu, Caizhi Ye
Summary: This study investigates the crack behavior of prestressed concrete sleepers using three-dimensional finite element models. The results show that the cracking resistance of concrete sleepers can be enhanced by improving the compressive strength of concrete and the initial prestressing force of tendons.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Mechanics
Vibhor Bhargava, A. Bassam Abu-Nabah, Maen Alkhader
Summary: The study focuses on theoretical modeling of vibrothermography and estimating system response through finite element methods to achieve realistic simulation of elastic wave propagation. It is demonstrated that using specific meshing criteria around the crack tip provides a practical approach, bringing finite element methods closer to realistic modeling of vibrothermography.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2022)
Article
Construction & Building Technology
Jeffrey P. Mitchell, Seung-Un Chae, Yoo-Jae Kim, Mohamed E. Abaza
Summary: This paper presents a finite element analysis of a bi-directional orthogonal model that incorporates individual crack strain separation and tracking. The objective is to expand the current shear friction model to manage bi-directional cracking at any angle. The proposed model was recalculated to improve accuracy by separating crack strains from total strains, and comparative analyses were conducted with other models for crack orientation.
Article
Construction & Building Technology
Milad Nimafar, Saied Jalil Hosseini, Alireza Akhlaghi, Bijan Samali, Shahrokh Soltaninia
Summary: This laboratory study evaluated the ability of two bacteria, Sporosarcina pasteurii and Bacillus sphaericus, to repair thermal cracks in reinforced concrete structures. The results showed that these microorganisms were able to effectively repair different types of cracks and significantly improve the compressive strength and water absorption resistance of the specimens.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2023)
Article
Construction & Building Technology
Sadjad Naderi, Wenlin Tu, Mingzhong Zhang
Summary: A meso-scale modelling framework was used to investigate the fracture process in concrete under compression, showing that aggregate shape has minimal effect on compressive strength while aggregate irregularity significantly influences crack initiation and growth in concrete.
CEMENT AND CONCRETE RESEARCH
(2021)
Review
Mechanics
W. Leclerc, A. Ammar, D. Moukadiri, T. Dridi, M. Guessasma
Summary: The study investigates the halo approach using the discrete element method to simulate crack initiation and propagation in homogeneous and heterogeneous materials. Results show that an appropriate halo diameter can efficiently reduce the intrinsic dispersion of stress and obtain proper stress fields and crack patterns. Care should be taken to avoid excessively large halos which may lead to unrealistic cracks.
COMPOSITE STRUCTURES
(2021)
Article
Construction & Building Technology
Berat Feyza Soysal, Yalin Arici, Kagan Tuncay
Summary: A modified applied element model is proposed to simulate the behavior of plain concrete continuum structures including discrete cracking. The model introduces diagonal elements to consider the Poisson effect and utilizes rigorous constitutive parameters. The approach is validated for both linear elastic problems and nonlinear range using benchmark tests.
MAGAZINE OF CONCRETE RESEARCH
(2023)