Results 71 to 80 of about 643,218 (189)

Mechanical Behaviors and Fatigue Performances of Ballastless Tracks Laid on Long-Span Cable-Stayed Bridges with Different Arrangements

Sensors, 2019
In this paper, we present a new attempt to lay ballastless tracks on long-span cable-stayed bridges on high-speed railways. The arrangements of ballastless tracks laid on cable-stayed bridges can be divided into two conditions: (i) across the cable ...
Xingwang Sheng, Weiqi Zheng, Zhihui Zhu
doaj   +1 more source

Intelligent recognition of defects in high‐speed railway slab track with limited dataset

Computer-Aided Civil and Infrastructure Engineering, Volume 39, Issue 6, Page 911-928, 15 March 2024.
Abstract During the regular service life of high‐speed railway (HSR), there might be serious defects in the concrete slabs of the infrastructure systems, which may further significantly affect public transportation safety. To address these serious issues and fulfill the regular functions of HSR, the traditional methods for railway engineers involve ...
Xiaopei Cai, Xueyang Tang, Shuo Pan, Yi Wang, Hai Yan, Yuheng Ren, Ning Chen, Yue Hou   +7 more
wiley   +1 more source

Mechanical characteristic variation of ballastless track in high-speed railway: effect of train–track interaction and environment loads

Railway Engineering Science, 2020
Due to the fact that ballastless tracks in high-speed railways are not only subjected to repeated train–track dynamic interaction loads, but also suffer from complex environmental loads, the fundamental understanding of mechanical performance of ...
Shengyang Zhu, Jun Luo, Mingze Wang, Chengbiao Cai   +3 more
doaj   +1 more source

Intelligent Detection of Surface Defects in High‐Speed Railway Ballastless Track Based on Self‐Attention and Transfer Learning

Structural Control and Health Monitoring, Volume 2024, Issue 1, 2024.
The detection of ballastless track surface (BTS) defects is a prerequisite for ensuring the safe operation of high‐speed railways. Traditional convolutional neural networks fail to fully exploit contextual information and lack global pixel representations.
Wenlong Ye, Juanjuan Ren, Chen Li, Wengao Liu, Zeyong Zhang, Chunfang Lu, Hoon Sohn   +6 more
wiley   +1 more source

Investigation on Dynamic Factors of Railway Steel‐Plate–Concrete Composite Beam Bridges With Small and Medium Spans

Advances in Civil Engineering, Volume 2024, Issue 1, 2024.
Dynamic factor (DF) is an important indicator for describing the dynamic action of a train on a bridge. For small‐ and medium‐span bridges, although existing research and codes have studied and specified the DF of steel–concrete composite beam bridges, few studies have been refined to steel‐plate–concrete composite beam bridges (SPCCBs), and the effect
Jin Di, Yi Su, Yuxuan Han, Jinming Luo, Fengjiang Qin, Rui Yan, John Mander   +6 more
wiley   +1 more source

The Influence of Cracks in Track Slab and its Reflection in Structure Design

, 2011
The loads and load combination in ballastless track design was briefly introduced. The influence of cracks to the track slab flexural stiffness was studied.
Ping Rui Zhao
core   +1 more source

Research on the dynamic mechanical properties of cement emulsified asphalt mortar for high-speed railway: A review [PDF]

AIP Advances
Cement emulsified asphalt mortar (CA mortar), as one of the key structural layers of slab ballastless track for high-speed railways, consists of cement, emulsified asphalt, sand, water, and appropriate additives, etc., which plays the roles of adjusting,
Hao Xu, Jiayin Chen, Weixing Liu, Kaize Xie, Kan Huang   +4 more
doaj   +1 more source

Microstructure in Adhesion Development Process and Strength Formation Mechanism in Early Stage of Cold Recycled Mixture with Emulsified Asphalt

Advances in Civil Engineering, Volume 2024, Issue 1, 2024.
With the large‐scale maintenance and renovation of asphalt pavement, a considerable amount of reclaimed asphalt pavement (RAP) will be generated. Stacking these wastes occupies a large amount of land and seriously damages the ecological environment. Hence, efficient regeneration of RAP through recycling technology has gained more and more attention. In
Xueying Zhao, Baofu Ma, Afshar A. Yousefi   +2 more
wiley   +1 more source

Hybrid Pixel‐Level Crack Segmentation for Ballastless Track Slab Using Digital Twin Model and Weakly Supervised Style Transfer

Structural Control and Health Monitoring, Volume 2024, Issue 1, 2024.
Crack detection at the pixel level across complex scenarios (structural interference and adverse working conditions) is a critical consideration in the maintenance of ballastless track slab (BTS). Although existing deep learning models achieve acceptable accuracy on cracks with a monotonous background, the ground truth with high labor cost is ...
Wenbo Hu, Weidong Wang, Xianhua Liu, Jun Peng, Sicheng Wang, Chengbo Ai, Shi Qiu, Wenjuan Wang, Jin Wang, Qasim Zaheer, Lichang Wang, Sara Casciati   +11 more
wiley   +1 more source

Circular Slab Track—Structural Analysis of Adapting Composite Materials to Ballastless Track Systems

Infrastructures
Rail transport is widely regarded as an efficient and environmentally sustainable mode of mobility, although lifecycle emissions from infrastructure can diminish its ecological benefits. This study assesses a novel slab track system design that replaces conventional concrete components with recycled polymeric composite sleepers, supporting circular ...
Lasse Hansen, Lars Voll, Dragan Marinkovic, Birgit Milius   +3 more
openaire   +1 more source