Influence of technological and environmental factors on the behaviour of the reinforcement anchorage zone of prestressed concrete sleepers

Jokūbaitis, Aidas; Marčiukaitis, Gediminas; Valivonis, Juozas

doi:10.1016/j.conbuildmat.2016.06.025

Cited by 20 publications

(14 citation statements)

References 27 publications

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“…However, the design of prestressed concrete sleepers leads to short distance between the center of the rail seat section and end of the sleeper. It means that smaller diameter reinforcement due to shorter transfer and anchorage length is used in prestressed concrete sleepers [4,5,[14][15][16][17].…”

Section: Of 22mentioning

confidence: 99%

“…They withstand static, cyclic, and impact loads of different types, directions and sizes caused by trains, and are affected by support reactions of the ballast [1][2][3][4]. Additionally, sleepers are affected by environmental influences (frost, humidity, temperature variation, aggressive materials) [5] and production processes [5,6]. Furthermore, sleepers need to ensure adequate distance between the rails; evenly distribute loads from the rails to the ballast; maintain adequate inclination of the rails; act as support for the rail; restrict longitudinal, vertical, and horizontal rail displacement; and be resistant to wear.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Research on the Behavior of the Rail Seat Section of Different Types of Prestressed Concrete Sleepers

2020

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Nowadays, prestressed concrete sleepers are the most common type of sleepers. In different countries all over the world prestressed concrete sleepers are designed with different shapes, with different types of prestressed reinforcement and arrangements in cross-section. Additionally, different manufacturing methods and techniques are used for prestressed concrete sleepers. These railway members are stiff, durable and can withstand heavy loads. Despite that, damaged or deteriorated prestressed concrete sleepers appear on railway tracks even before the end of their service life. Therefore, there is a need for better understanding of the behavior of different types of prestressed concrete sleepers to optimize their design. The rail seat section of the sleeper is the most affected part of sleeper. Therefore, analysis of experimental results of bearing capacity, cracking, and deformation of the rail seat section of sleeper under static and dynamic loads are provided in this article. Furthermore, different types, diameters, and anchoring methods of prestressed reinforcement were analyzed in this article. Additionally, comparison of experimental results of different types of prestressed concrete sleepers is discussed.

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Section: Of 22mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Research on the Behavior of the Rail Seat Section of Different Types of Prestressed Concrete Sleepers

2020

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“…The deterioration of prestressed concrete sleepers usually starts at the ends of the sleeper (rail seat section and anchorage zone of reinforcement) (Mielenz et al, 1995;Sahu & Thaulow, 2004;Ferdous & Manalo, 2014), where the greatest technological defects occur (Jokūbaitis, Marčiukaitis and Valivonis, 2016). Therefore, it is very important to ensure the quality of technological processes during the manufacture of the sleepers and reduce the probability of occurrence of initial damage.…”

Section: Introductionmentioning

confidence: 99%

Damage of prestressed concrete railway sleepers and its impact on durability

Jokūbaitis

Marčiukaitis

Valivonis

2019

Modern Building Materials, Structures and Techniques (MBMST)

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Prestressed concrete railway sleepers are the most widespread sleepers due to their stiffness and high bearing capacity. They transfer train induced loads from the rails directly to the ballast and therefore are the most important part of the railway structure. As railway traffic is constantly increasing with increasing loads and additional environmental effects take place it is necessary to ensure safety of the railway. Therefore, the present study focuses on durability of prestressed concrete railway sleepers. This paper examines new sleepers and sleepers damaged during exploitation. As all sleepers were manufactured at the same time the comparison of cracking loads and bearing capacity are provided. Additionaly, a difference between chemical composition of concrete samples from new and exploited sleepers is briefly discussed. Further, possible causes of damages of exploited sleepers are analyzed.

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“…Therefore, water penetration into microcracks can accelerate the deterioration of concrete structure. Especially it is important for the anchorage zone of prestressed concrete elements …”

Section: Introductionmentioning

confidence: 99%

“…Especially it is important for the anchorage zone of prestressed concrete elements. 5 The majority of pullout experiments were performed with deformed bars. The scientists have proposed different equations with different empirical coefficients for bond stress-slip relationship of deformed bars.…”

Section: Introductionmentioning

confidence: 99%

Influence of cyclic loading and frost on the behavior of bond of three‐wire strand

Jokūbaitis

Marčiukaitis

Valivonis

et al. 2018

Structural Concrete

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This paper presents the results of an experimental research investigating the influence of static and cyclic loading and frost impact on the bond between concrete and 6.2 mm three‐wire‐strand. From the pullout tests, it was determined that a cyclic load did not negatively influence the bond strength of three‐wire strand. On the contrary, the influence of cyclic loading after 200 freezing and thawing cycles resulted in a significant decrease of bond strength of three‐wire strand. Additionally, the new parameters for bond stress–slip relationship suggested in Model Code 2010 are proposed for the 6.2 mm three‐wire strand cast with concrete having compressive strength of 82.6 MPa with standard deviation of 6.65 MPa. The results of dynamic coefficient b for 6.2 mm three‐wire strand used in relationship between a slip of reinforcement and a number of loading cycles under unidirectional cyclic loading suggested in Model Code 2010 are analyzed.

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Influence of technological and environmental factors on the behaviour of the reinforcement anchorage zone of prestressed concrete sleepers

Cited by 20 publications

References 27 publications

Experimental Research on the Behavior of the Rail Seat Section of Different Types of Prestressed Concrete Sleepers

Experimental Research on the Behavior of the Rail Seat Section of Different Types of Prestressed Concrete Sleepers

Damage of prestressed concrete railway sleepers and its impact on durability

Influence of cyclic loading and frost on the behavior of bond of three‐wire strand

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