Results 21 to 30 of about 947 (220)

Fracture Modeling of the Bi-Block Ballastless Track System Resulting from Early-Aged Relative Humidity during the Construction Process

Advances in Civil Engineering, 2021
Drying-induced cracks are an important issue for bi-block ballastless track system consisting of foundation, precast sleepers, and cast-in-place track slab, which not only significantly affects the comfortableness and safety of rapid transit railway but ...
Shihao Cao, Wang Hui, Shufang Zhai, Kui Hu, Yujing Chen, Junqi Chen   +5 more
doaj   +1 more source

Field Tests on Eco-Friendly Railway Precast Concrete Slab

Applied Sciences, 2020
This study focuses on evaluating the field performance of a newly developed eco-friendly precast concrete slab track structure for railway/subway systems in Seoul, South Korea.
Taehoon Koh, Moochul Shin
doaj   +1 more source

Nonlinear responses of longitudinally coupled slab tracks exposed to extreme heat waves [PDF]

, 2023
Structural responses of longitudinally coupled slab tracks (LCSTs) under extreme heat waves (EHWs) and the adaptability of track reinforcement measures to cope with EHWs-related issues have been unprecedentedly investigated in this study.
Kaewunruen, Sakdirat, Li, Haiyan, Li, Yang, Zhang, Guangpeng   +3 more
core   +1 more source

Field Measurement and Energy Analysis of Ground‐Borne Vibration around High‐Speed Railway Viaduct

Shock and Vibration, Volume 2023, Issue 1, 2023., 2023
In order to investigate the vibration characteristics and propagation mechanism of ground vibrations induced by high‐speed train passing through the viaduct, a field experiment is carried out, and the measured data is deeply analyzed. Besides the independent time domain and frequency domain analysis, the continuous wavelet transform (CWT) is performed ...
Yanmei Cao, Qi Xiang, Boyang Li, Zhaoyang Li, Madalina Dumitriu   +4 more
wiley   +1 more source

Experimental Study on the Dynamic Characteristics of a New Long‐Short Pile Composite Foundation under Long‐Term Train Load

Shock and Vibration, Volume 2023, Issue 1, 2023., 2023
Long‐short pile composite foundation (PC‐LSPCF) composed of part‐screw pile and cement‐soil compaction pile is a new railway foundation treatment method, which has been widely used in high‐speed railway construction projects in China. To explore the dynamic characteristics and deformation characteristics of railway PC‐LSPCF under long‐term train loads,
Zhao-rong Zhu, Wei Guan, Kan Han, Hong-gang Wu, Shou-quan Zhao, Xu Liu, Yaobing Zhao   +6 more
wiley   +1 more source

Influence of mixture composition on fresh concrete workability for ballastless track slabs [PDF]

E3S Web of Conferences, 2020
There are several factors that affect the fresh concrete workability: water demand and composition of Portland cement, properties of fine and coarse aggregates, presence of superplasticizer and others admixtures, etc. Influence of quantity and fineness of ground quartz additives as well as polycarboxylate-based superplasticizer amount on workability of
Kazanskaya Liliya, Smirnova Olga
openaire   +2 more sources

Effect of Track Support Structures on Friction‐Induced Vibrations of Wheelset‐Track Systems

Shock and Vibration, Volume 2023, Issue 1, 2023., 2023
The aim of the present investigation is to study the effect of track support structures on the metro 5th to 8th‐order out‐of‐round (OOR) wheel caused by friction‐induced vibrations. Three finite element models of metro‐leading wheelset‐track systems with three types of track support structures were established.
Hua Fu, Fei Kang, Shanglin Liu, Xi Kang, Lutz Auersch   +4 more
wiley   +1 more source

Dynamic Response Characteristics of the Electric Domain Structure of Ferroelectric Materials to the Surrounding Rock Structure of a Heavy‐Duty Railway with a Small‐Clearance Crossing Tunnel

Journal of Nanomaterials, Volume 2022, Issue 1, 2022., 2022
At present, the world‐wide heavy‐haul transportation technology of cargo trains has developed rapidly. Heavy‐haul railway transportation has received extensive attention due to its large capacity, high efficiency, and low transportation costs. In order to understand the role that ferroelectric materials can play in the dynamic response of a heavy‐duty ...
Xiaotian Hao, Hailong Wang, Awais Ahmed
wiley   +1 more source

Simulation Study on Vertical Deformation of CRTS III Slab Track under Ambient Temperature and Its Upgrade to “Green Maintenance”

Applied Sciences, 2021
In view of the vertical deformation of CRTS III slab ballastless track of high-speed railways under the action of ambient temperature, a simulation model of the temperature field and vertical deformation of CRTS III slab ballastless track was developed ...
Junzhao Zhou, Yanyun Luo, Guosheng Lv, Yongliang Xiong   +3 more
doaj   +1 more source

Experimental Study and Numerical Analysis of Structural Performance of CRTS II Slab Track under Extreme High Temperature

Advances in Materials Science and Engineering, Volume 2022, Issue 1, 2022., 2022
A ballastless track is susceptible to damage and even failure of structural components under the long‐term effects of extremely high temperatures. In this paper, considering the influence of different constraint boundaries, a 1 : 4 scaled model of a ballastless track‐bridge structural system was produced and placed in a large‐sized environmental ...
Anxiang Song, Guowen Yao, Xuanrui Yu, Yuerui Wang, Yifei Wu, Shengwen Tang   +5 more
wiley   +1 more source