Experimental and Numerical Studies of Railway Prestressed Concrete
Prestressed concrete sleeper is a safety-critical track component widely used in ballasted railway tracks. The performance, endurance and quality of prestressed concrete sleepers can detrimentally ...Web
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Fatigue of steel-fibre-reinforced concrete prestressed railway sleepers
Prestressed concrete sleepers manufactured in accordance with Australian Standard AS1085.14, or other design guidelines, are designed to reduce or eliminate low magnitude but high cycle fatigue problems. ... Prestressed concrete is the most commonly used type of railway sleepers around world. Crushing is a common damage (under …Web
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Optimal design and analysis of pre-stressed concrete sleepers
The proposed methodology aims to determine the following items: the suitable sleeper spacing for a given rail type, the wheel load distribution along successive sleepers, the moment within mono-block pre-stressed concrete sleeper (B70), the crushing strength between (sleeper and ballast surface) and finally the suitable effective ballast depth.Web
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Optimal Design and Spacing of Mono-Block Prestressed Concrete Sleeper
The present paper proposes scientific and practical methodology to solve the following problems: the value of dynamic impact factor, sleeper spacing, Wheel load distribution along successive sleepers, stress beneath the sleeper and stress reductionWeb
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Flexural Performance Sensitivity and Uncertainty Analysis of
Kaewunruen evaluated the reliability of prestressed concrete sleepers and using reliability analysis found that sleeper shape is optimized, such that sleepers tend to provide low to moderate safety indices at the service performance level and developed the reliability-based design for concrete sleepers that resulted optimize and save material ...Web
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Evaluation of remaining fatigue life of concrete sleeper based on …
Prestressed concrete is the most commonly used type of railway sleepers around world. Crushing is a common damage (under resultant compressive stress) in concrete sleepers, which is attributable to excessive flexural, shear, pre-stress and bond actions. ... New designed LCR-6 type sleepers were compared with standard B70 type …Web
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Cracking and Crushing in Prestressed Concrete Beams
DOI: 10.14359/51728184. Date: 3/1/2021. Abstract: The cohesive/overlapping crack model represents an effective tool in the study of failure transition phenomena occurring in plain or reinforced concrete structures. In the present paper, this non-linear fracture mechanics model is applied to study the global structural behavior of …Web
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Fatigue life modelling of railway prestressed concrete sleepers
Crushing is a common damage (under resultant compressive stress) in concrete sleepers, which is attributable to excessive flexural, shear, pre-stress and bond actions. Dynamic impact loading ...Web
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Performance of Innovative Precast Concrete Sleepers Prestressed …
Title: Performance of Innovative Precast Concrete Sleepers Prestressed with Glass Fiber-Reinforced Polymer Reinforcing Bars. Author(s): Abdeldayem Hadhood, Hamdy M. Mohamed, ... while the prestressed steel-RC sleepers failed by crushing of the concrete due to the slippage of steel strands. Moreover, field inspection of GFRP …Web
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Structural response of monoblock railway concrete sleepers and
The existing variation is mainly due to the difference in the geometry of the concrete sleeper used in the computations. Besides, the same modelling strategy was proven elsewhere to replicate the experimental bending test results of prestressed concrete sleepers [35]. This means that the modelled concrete sleeper can …Web
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Experimental and numerical studies of railway prestressed concrete
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BOND STRESS-SLIP OF STRAND IN PRESTRESSED …
sleeper bending scenario is highly variable depending on the track substructure condition (Sadeghi 2008); therefore, causing variability in the location of peak bending stresses along the sleeper in different rail tracks. Rail Prestressed concrete Sleeper Figure 1. Typical prestressed concrete sleeper in railway track. Figure 2. Typical wheel ...Web
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Fracture mechanics analysis of Pre-stressed concrete sleepers …
This paper presents an investigation on pre-stressed concrete sleepers based on the principles of fracture mechanics in concrete material. To evaluate fracture mechanics parameters pre-stressed ...Web
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Green approach on ternary blended pre stressed cement concrete …
1. Introduction. Railway sleepers carry and distribute rail loads to the rail-supporting substructure, preserve track gauge and endure vertical and longitudinal rail movement (Taherinezhad et al., 2013).Due to enhanced durability and structural performance as well as a lower lifetime cost compared to other types of railway beds, …Web
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Green approach on ternary blended pre stressed cement …
The objectives of present study is to ascertain the behaviour of ternary blended prestressed concrete sleepers under static bending test and to make …Web
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Fatigue life modelling of railway prestressed concrete sleepers
Crushing is a common damage (under resultant compressive stress) in concrete sleepers, which is attributable to excessive flexural, shear, pre-stress and …Web
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Development of Geopolymer Concrete on Railway Pre-Stressed Concrete
Railway prestressed concrete sleeper is an imperative for component of ballasted railway tracks. Its main function is to help distributing axle loading to sub grade and formation. By nature, the concrete sleeper is subjected to sagging moment at the rail seat zone and to hogging moment at the middle section. Although behaviours of concrete ...Web
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(PDF) Structural behaviour of prestressed concrete sleepers …
The proposed methodology aims to determine the following items: the suitable sleeper spacing for a given rail type, the wheel load distribution along successive sleepers, the moment within mono-block pre-stressed concrete sleeper (B70), the crushing strength between (sleeper and ballast surface) and finally the suitable effective ballast depth.Web
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Full-scale static and single impact testing of prestressed concrete
The inclusion of fibres in prestressed concrete sleepers has a negligible influence on the pre-cracking strain behaviours when tested under rail seat positive moment configuration. Indeed, the variation between PO and PF results at first crack was minor, …Web
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Time-dependent behaviours of railway prestressed concrete sleepers …
The creep and shrinkage in prestressed concrete sleepers result in internal actions that is led to geometric deformation, which change the rail gauge and influence the safety and reliability of track components. ... Prestressed concrete is the most commonly used type of railway sleepers around world. Crushing is a common damage (under …Web
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BOND STRESS-SLIP OF STRAND IN PRESTRESSED …
Railway prestressed concrete sleepers are located between the rail and ballast in transverse direction to the rail. The sleepers transfer the loads from the rail to the track …Web
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A review of failures of railway monoblock prestressed concrete …
Highlights Prestressed concrete sleepers are being increasingly used for modern railways worldwide. The main advantages of this type of sleeper are its high …Web
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Machine Learning Based Design of Railway Prestressed …
To automate complex design procedures, machine learning has been employed in the design of prestressed concrete sleepers. In this study, the maximum …Web
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Structural behaviour of prestressed concrete sleepers produced …
A comparative analysis of the structural behaviour of prestressed concrete sleepers made with high performance concrete (HPC) and high performance recycled aggregate concrete (HPRAC) is presented ...Web
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(PDF) Modification of Concrete Railway Sleeper Mix
The current paper deals with the numerical investigation of a unique designed pre-stressed rein-forced concrete railway sleeper for the design speed of 300 km/h, as well as an axle load of 180 kN.Web
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Structural behaviour of prestressed concrete sleepers produced …
Abstract A comparative analysis of the structural behaviour of prestressed concrete sleepers made with high performance concrete (HPC) and high performance …Web
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Dynamic design guidelines for prestressed concrete sleepers
The proposed methodology aims to determine the following items: the suitable sleeper spacing for a given rail type, the wheel load distribution along successive sleepers, the moment within mono-block pre-stressed concrete sleeper (B70), the crushing strength between (sleeper and ballast surface) and finally the suitable effective ballast depth.Web
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Flexural cracking-induced acoustic emission peak frequency shift …
Four full-scale pre-stressed railway concrete sleepers kindly supplied by industry partner CEMEX are shown in Fig. 1(a). The characteristic length of sleepers is 2500 mm, depth at mid-span is 175 mm, depth at rail seat is 200 mm and width is 200 mm in accordance with CEMEX [40]. ... The marking of crack progression (shown in Fig. 4) was …Web
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Nonlinear finite element analysis for structural
Introduction. Prestressed concrete sleepers are one of the most important components in ballasted railway tracks [[1], [2], [3]]. Prestressed concrete sleepers lie between the rail and ballast, to transfer the train's loads from the wheel to the rail, and the rail to the ballast bed; and then to secure rail gauge and keep the geometry of railway …Web
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Performance of innovative precast concrete sleepers prestressed …
For prestressed GFRP sleepers to be accepted as replacements for defective sleepers made with timber and concrete, they must pass several short- and long-term tests. Full-scale GFRP- and steel-reinforced concrete sleepers were designed, tested, and compared according to the requirements of the American Railway Engineering and Maintenance-of …Web
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