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Article
Acoustics
Ruihua Liang et al.
Summary: In this study, a prediction method based on transfer learning is proposed to address the issues of high computational cost and prediction uncertainty in train-induced ground-borne vibration prediction. The method uses vehicle-track-coupled analytical model and three-dimensional finite element model to calculate train-induced ground vibration under various conditions as training samples for pre-training deep neural network models. The pre-trained models are then fine-tuned with measured vibration data using the transfer learning strategy. A Gaussian distribution is assumed for the predicted vibration acceleration levels to model the randomness of train-induced vibration. The fully trained model can complete the prediction in seconds. A case study demonstrates the feasibility and improvement of the proposed method by comparing the probabilistic prediction results with field measurements.
JOURNAL OF VIBRATION AND CONTROL
(2023)
Article
Chemistry, Analytical
Hao Fu et al.
Summary: The interspersed railway track is an improved timber railway track that enhances the bearing capacity of existing lines by replacing damaged wooden sleepers with new concrete sleepers. However, these interspersed tracks have lower stability compared to concrete tracks and are prone to deterioration in extreme weather conditions. This study investigates the collective effects of ballast washaway and uneven axle loads on the vulnerability of conventional and interspersed railway tracks, providing insights to develop proper operations against natural hazards.
Article
Construction & Building Technology
Juan-juan Ren et al.
Summary: This paper proposes a subgrade settlement identification method based on vehicle vibration signals for the double-block ballastless track. By combining feature extraction and algorithms such as support vector machines (SVMs) and convolutional neural networks (CNNs), a vehicle-track-subgrade vertical coupling model is established to accurately identify subgrade settlement diseases on ballastless tracks.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Civil
Rui Zhou et al.
Summary: This study investigates the interfacial thermal behavior of CRTS II slab track under high-temperature conditions using experiments and heat transfer models. The results show that there is a quadratic polynomial relationship between the stresses and internal temperature of the track slab. Furthermore, under continuous high temperature conditions, interface damage zones grow with an upward arching shape.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Yang Li et al.
Summary: This study investigates the structural responses of longitudinally coupled slab tracks (LCSTs) under extreme heat waves (EHWs) and the adaptability of track reinforcement measures. A novel finite element model (FEM) is established to assess the nonlinear mechanical behaviors of LCSTs. The paper highlights the nonlinear structural responses of LCSTs and demonstrates the effectiveness of track reinforcement measures in mitigating track damage under EHWs.
ENGINEERING STRUCTURES
(2023)
Article
Construction & Building Technology
Rui Zhou et al.
Summary: This study aims to systematically investigate the thermal responses of the bridge supported CRTS II slab track system by conducting experimental testing and theoretical modelling. The results show that the boundary conditions of the CRTS II slab track have a significant influence on its thermal responses, with higher thermal stress under fixed boundary conditions. Importantly, the vertical thermal gradient induced by the diurnal temperature variation could lead to damage of the interface between the track slab and the cement asphalt mortar.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Mechanical
Juan-juan Ren et al.
Summary: This paper aims to guide the maintenance and repair of ballastless track quality by determining a set of comprehensive evaluation indices. Crackling and interlayer debonding are the two typical types of damage that were focused on. The entropy weight method-fuzzy analytic hierarchy process (EWM-FAHP) was used to propose cracking interspace volume (CIV) and debonding interspace volume (DIV) as well as their weights for measuring the damage degree. A model containing cracking and debonding was established and the weights were modified based on the models' calculated results. The quality condition index (QCI) was determined to assess the quality state of the slab track comprehensively.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Engineering, Mechanical
Anand Raj et al.
Summary: Improving the impact resistance of railway sleepers can reduce damages caused by heavy impact loads. Pre-treated crumb rubber concrete sleepers with reinforced fibres have shown significant impact resistance. The optimal proportions of pre-treated crumb rubber, steel fibres, and polypropylene fibres can be determined through drop weight impact tests. A numerical model has been validated and used to study the behavior of ballasted tracks with steel and PF-reinforced/pre-treated RCSs.
NONLINEAR ENGINEERING - MODELING AND APPLICATION
(2023)
Article
Engineering, Multidisciplinary
Wei Du et al.
Summary: In this study, a finite element model was established to accurately identify the potential contact loss of the China railway track system (CRTS) III prefabricated slab track under transient impact. Damage-sensitive indices in the time and frequency domains were extracted from the vertical accelerations near impact points and fused using the Dempster-Shafer (D-S) evidence theory. A two-stage identification method was proposed, consisting of rough identification (Stage I) and precise identification (Stage II), to identify the damaged area. The research results showed that the proposed method improved the accuracy of damage detection and could achieve an identification accuracy of 70%-80% when the contact loss of self-compacting concrete (SCC) exceeded 50% along the thickness direction.
JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE A
(2023)
Article
Construction & Building Technology
Wei Du et al.
Summary: This study investigates the influence of interlayer cohesive parameters on the interface connection between track slab and self-compacting concrete (SCC) in China railway track system (CRTS) III prefabricated slab tracks. Experimental tests and finite element simulations were conducted to analyze the cracking behavior and interlayer damage under different loads. The results show that reducing interface stiffness and increasing critical fracture energy can delay interface damage and debonding. Moreover, increasing cohesive strength effectively inhibits the development of interface damage, and extreme temperature areas are crucial for interlayer debonding in slab track systems.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Rui Zhou et al.
Summary: This paper investigates the effect of environmental temperature on the thermal performance of CRTS II ballastless slab track and compares the results of two scaled models under different constraint conditions. The study finds that the internal temperatures, stresses, and displacements of the track structure increase nonlinearly with an increase in environmental temperature, and decrease linearly with a decrease in temperature. Fixed constraint conditions slow down the heat transfer from the track slab to the cement asphalt mortar.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Yang Li et al.
Summary: In this study, the effects of novel solar reflective coatings on the interfacial damage of CRTS II slab track were investigated. The study found that the non-linear temperature distribution of the track slabs can lead to underrated interfacial damage. Both types of solar reflective coatings were effective in reducing interfacial damage and slab vertical displacement, with the organic coating showing better performance. The interface bond strength of the coated tracks should be greater than 0.02 MPa to avoid debonding.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Environmental Studies
Panrawee Rungskunroch et al.
Summary: This paper compares the environmental and economic impacts of five HSR networks from five countries, finding that CRC system leads in energy-saving and SCNF network benefits from the economy of scale.
ENVIRONMENTAL IMPACT ASSESSMENT REVIEW
(2021)
Article
Construction & Building Technology
Yichen Huang et al.
Summary: This study investigates the damage initiation and evolution of the wide and narrow joint in the longitudinal CRTS-II track using a refined finite element model. The analysis shows that tensile damage causes initial cracks inside the narrow joint, and the increase of compressive damage leads to the final failure of the narrow joint concrete. Additionally, joint damage impacts the upper-arch mechanism on the track slab, with a linear increase in arch height as joint damage degree rises.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
A. Ramos et al.
Summary: This paper compared the settlement performance of ballast and slab railway track structures through laboratory experiments and calibrated numerical models based on the results. The study found a strong agreement between the numerical and experimental results, indicating the effectiveness of the track modeling approach in predicting the long-term behavior of track structures.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Civil
Xuan-Yi Zhang et al.
Summary: The study developed a unitless model for system reliability analysis of the CRTS II track slab, finding that considering individual failure modes only would overestimate reliability, and that the randomness of load cycles significantly affects the system reliability of the track slab.
ENGINEERING STRUCTURES
(2021)
Article
Computer Science, Interdisciplinary Applications
Chayut Ngamkhanong et al.
Summary: This study investigates the buckling behavior of interspersed railway tracks subjected to temperature change using 3D finite element modeling. The findings suggest that the interspersed approach may reduce the likelihood of track buckling. These results can be utilized for predicting buckling temperature and inspecting the conditions of interspersed railway tracks.
COMPUTERS & STRUCTURES
(2021)
Article
Construction & Building Technology
Yang Li et al.
Summary: The study investigated the impact of a novel solar reflective fluorocarbon coating on the performance of ballastless tracks of high-speed railways at high temperatures. Experimental and numerical analysis showed that the coating can effectively reduce temperature deformation and improve mechanical behavior of the track components.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Xuhao Cui et al.
Summary: The crack in the CRTS II slab track is a major issue affecting the operation, with the train load and water having significant impacts. Research indicates that the stress intensity factors at the crack tip increase due to the train load, leading to cracking in a sliding or scissoring shear mode, while the effect of water in the crack is not clear.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Mechanical
Yang Li et al.
Summary: This study investigates the interfacial failure and arching issues of the CRTS II slab track reinforced by PIR bars due to temperature effects. The simulation results show that PIR bars can improve the temperature rise of interface failure and reduce arching displacement of slabs caused by temperature rise. Both PIR bond strength and interface bond strength significantly affect the maximum arching displacement of track slabs.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Engineering, Mechanical
Xiaopei Cai et al.
ENGINEERING FAILURE ANALYSIS
(2020)
Article
Chemistry, Multidisciplinary
Seongbaek Park et al.
APPLIED SCIENCES-BASEL
(2020)
Article
Engineering, Civil
Yang Li et al.
Article
Engineering, Civil
Jiwen Zhang et al.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2020)
Article
Construction & Building Technology
Yude Xu et al.
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Construction & Building Technology
Pasakorn Sengsri et al.
Article
Engineering, Mechanical
Xiao-Pei Cai et al.
ENGINEERING FAILURE ANALYSIS
(2019)
Article
Chemistry, Analytical
Wen-Fa Zhu et al.
Article
Mechanics
Shihao Cao et al.
ENGINEERING FRACTURE MECHANICS
(2016)
Article
Mechanics
Shengyang Zhu et al.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2014)
