Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 25 for “"railway track"”.
-
Considerations in the Analysis of Conventional Railway Track Support Systems
Made available in DSpace on 2014-12-13T19:31:31Z (GMT). No. of bitstreams: 1 7616205.pdf: 4933243 bytes, checksum: e76675ff276ccc92eb719f26f746b88c (MD5) Previous issue date: 1976
-
Development of innovative approaches for life extension of railway track systems
… and the practical application of processes for railway track asset management in the UK between 2004 and 2013 and the subsequent development of innovative solutions. There are two major sections to the portfolio; firstly the background, literature review and development phases; and secondly two …
-
Integrated approach for simulation and prediction of railway track dynamic responses
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-05-01
-
Train-induced dynamic response of railway track and embankments on soft peaty foundations
The mainline railway track between Dublin and Belfast in Northern Ireland was constructed during the 1850's. Substantial lengths of railway embankment were constructed over poor-quality peaty soils. This was accomplished using tree trunk fascines placed directly on the natural ground surface; with …
-
Finite element analysis of railway track under vehicle dynamic impact and longitudinal loads
… can cause severe damage to both railcar and rail track components. In addition, the increasing tractive power of locomotives leads to significant increase in the longitudinal load demand in railway tracks. The capacity of longitudinal restraint of existing rail fastening system and its dependency …
-
A methodology for developing high damping materials with application to noise reduction of railway track
… system<br/>used for damping the vibration of a railway track. This is required to be effective over a<br/>temperature range -20°C to 40°C.<br/><br/>To investigate the effect of the temperature on the performance of a rail damper,<br/>a simple Timoshenko beam model of the track vibration is used, …
-
Design, Modeling and Tests of Electromagnetic Energy Harvesting Systems for Railway Track and Car Applications
… present in railcar suspensions and railroad tracks to generate electricity that is suitable for onboard or trackside electronics, using electromagnetic generators. Compact electromagnetic energy harvesters that can be installed onboard railcars or wayside on railroad tracks are designed, …
-
Railway track condition change detection: A data-driven approach to track geometry and component degradation modeling
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-12-01
-
Automating the Generation of Geometric Information Models to Support Digital Twinning of Existing Rail Infrastructure
… true for rail infrastructure because railway digital twin generation could be an efficient means for maintaining and retrofitting the fundamental mode of the nation’s transport. Recent statistics illustrate that the UK increased £5.4 billion of expenditure on railway maintenance per …
-
Outsourcing transportation infrastructure maintenance : a theoretical approach with application to JR East
… the same time by implementing these strategies. Railway infrastructure maintenance is not outsourced as much as highway maintenance in the US. However, a theoretical discussion about outsourcing and contracting shows that railway track maintenance can be outsourced to enhance operating …
-
Development of a methodology for calculating stresses in track components
… two decades for calculating rail stresses on railway track, was revisited and improved. The model provided engineers with an easy-to-use program for evaluating track capacity and authorizing heavier loads on track. The model was modified to calculate rail and track component stresses more …
-
Investigation into the feasibility of an electro-optic rail surface monitor
Cracks and surface imperfections in railway track are important when considering its lifetime. This thesis investigates the feasibility of a new electro-optic technique which records surface irregularities on a track. It is more sensitive to crack detection than the traditional trailing wheel …
-
A Procedure To Develop Scalable Reduced Models For The Transient Response of Sleepers In Conventional And High-speed Railway Lines.
… wave effects of distant sleepers in a long railway track. For development purposes, and, without loss of generality, the geometry of the sleepers is consistent with the UIC-60 track system commonly used in European High Speed Rail. The proposed reduced models are based on B Spline Impulse …
-
Flexural distress and degradation mechanisms in pretensioned concrete beams and railroad crossties
… are an essential component of ballasted railroad track and concrete is a commonly used material for crossties in demanding locations such as heavy axle load (HAL) freight railroads, high-speed rail lines, and rail transit systems. Concrete crossties are often designed as prestressed concrete …
-
Evaluation of the residual prestress force in aged railway concrete sleepers considered for reuse
The increasing demand for railway transport in South Africa has led to the expansion and upgrade of the existing track infrastructure in recent years. Given the high costs associated with new development or refurbishment of existing infrastructure, asset owners and managers are faced with the …
-
Track model for predicting dynamic responses of railroad bridge approaches
… focused on the development of a novel train-track-bridge model that can analytically tackle the difficult problem of a railway track transition zone and effectively simulate the dynamic response of a bridge approach subjected to moving train loads. The scope of the research encompassed …
-
Quantification of prestressed concrete railway crosstie flexural response: Implications for mechanistic design
… mechanistic-empirical design practices to other railway track components.
-
Investigation of aggregate properties influencing railroad ballast performance
… portion of the annual budget to sustain the railway track system goes toward the maintenance and renewal of ballast. Railroad ballast is a uniformly-graded coarse aggregate placed between and immediately underneath the crossties. Large variations in the source properties of new ballast …
Page 1 of 2