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

Jokūbaitis, Aidas; Marčiukaitis, Gediminas; Valivonis, Juozas

doi:10.3390/ma13112432

Cited by 10 publications

(3 citation statements)

References 16 publications

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“…There has been increasing concern about the durability of prestressed concrete structures due to the corrosion of prestressed steel strands, especially in corrosive environments such as parking garages, bridges, marine structures, and railway sleepers [ 1 , 2 , 3 ]. Steel corrosion is accelerated in these structures as a result of the influence of a chloride-rich environment (deicing salts, etc.).…”

Section: Introductionmentioning

confidence: 99%

An Analysis of the Transfer Lengths of Different Types of Prestressed Fiber-Reinforced Polymer Reinforcement

Jokūbaitis

Valivonis

2022

Polymers

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The main aim of this paper is to provide a broader analysis of the transfer lengths of different types of fiber-reinforced polymers (FRPs) and to provide corrections to the existing theoretical models. Therefore, this paper presents a description of the main factors that influence the transfer lengths of different types of FRPs based on experimental results found in the literature. A database of more than 300 specimens was compiled with the results of the transfer lengths of different FRPs and the main influencing parameters. The analysis of the database results showed that the transfer length of the carbon fiber composite cable (CFCC) strands depends on the type of prestressed reinforcement release. Therefore, in this article, the new coefficient αt = 2.4 is proposed for the transfer length of suddenly released CFCC strands. Additionally, the transfer length of the aramid fiber reinforced polymer (AFRP) depends on its surface conditions. Therefore, new coefficients αt = 1.5 and αt = 4.0 are also proposed for the transfer lengths of smooth braided and sanded and rough AFRP bars, respectively. Furthermore, the proposed coefficients αt = 2.6, αt = 1.9, and αt = 4.8 found in the literature were validated with the analysis of a larger database of the transfer lengths of glass fiber-reinforced polymer (GFRP) bars, carbon fiber-reinforced polymer (CFRP) bars, and gradually released CFCC strands, respectively. Moreover, the main existing theoretical models are presented, and the comparison of theoretical and experimental transfer length results is discussed. However, the low number of specimens prestressed with basalt fiber-reinforced polymer (BFRP) bars prevented the deeper analysis of the results. the analysis of the transfer length and the proposed new values of the coefficient αt provides possibilities for adapting it to design codes for engineering applications and performing additional research that fills the missing gaps in the field.

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Section: Introductionmentioning

confidence: 99%

An Analysis of the Transfer Lengths of Different Types of Prestressed Fiber-Reinforced Polymer Reinforcement

Jokūbaitis

Valivonis

2022

Polymers

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“…The phenomenon of cracking of prestressed concrete sleepers (PSCs)' monobloc under static loading has interested several researchers. In this study, we are interested in the case raised by the following researchers (Jok ubaitis et al, 2016(Jok ubaitis et al, , 2020Abadi et al, 2019;You et al, 2019;Li et al, 2018;Koh et al, 2016;Taherinezhad et al, 2013;Esmaeili and Yousefi Mojir, 2011;Remennikov and Kaewunruen, 2008;Kaewunruen and Remennikov, 2007;Sadeghi, 2008;Alias, 2004;Xe et al, 1994). Koh et al (2016) have studied the damage mode of monobloc type PSCs under positive tests at the level of the rail seat.…”

Section: Introductionmentioning

confidence: 99%

Analysis of cracking evolution mode of the monobloc sleeper

Tahi

Chikhaoui

Chabaat

2023

IJSI

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PurposeMonobloc sleepers have several problems related to bending cracking, especially longitudinal cracking and cracking at rail seat under preload release. Therefore, the purpose of this study is to describe the behavior and cracking mode of prestressed concrete railroad sleepers under static loads using the positive test. Experimental tests followed by 3-D numerical models were performed of the same test.Design/methodology/approachTwo steel supports were placed on the rail seat. During a progressive loading, the initiated cracks had approximately the same amplitude as those obtained from the numerical model. The type of cracking depends on the intensity of the applied static load and the loading rate. A validated three-dimensional digital model was established. The obtained results showed a perfect resemblance to the experimental tests. The final design was optimized and verified using a validated numerical simulation.FindingsAt low static loading levels, the first flexural shear cracks appeared at a vertical position located between the two steel supports. At higher static loading levels, bending shear cracks have occurred. The latter are inclined at the steel supports. It was proven that for higher loading levels, shear cracks were the primary mode of failure.Research limitations/implicationsOwing to the sensitivity of monobloc sleepers to technology production, the results are limited by the maximal loading and press used.Practical implicationsNumerical modeling greatly reduces uncertainties in laboratory testing and is an important tool for visualizing and quantifying rail seat cracks to understand behavior and predict collapse.Social implicationsEnsuring human life during rail operations is one of our the long-term priorities. This cannot be done unless the authors manage to master the manufacturing tool for sleepers while controlling the limitation of crack propagation.Originality/valueThe three-dimensional numerical established model has been checked and validated against the experimental results using the positive test to understand the behavior and the cracking mode of prestressed concrete railroad sleepers under static loads. The proposed numerical model has been more refined for a later more complex application by reducing the computation time.

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“…The corrosive environment of such structures as marine structures, bridges, parking garages, and railway sleepers (Jokūbaitis et al, 2020b; is the main concern with regard to steel corrosion (deicing salts, etc.). Therefore, there is increasing interest in the use of FRP materials, namely, CFRP, AFRP, GFRP, and relatively new BFRP (E. as replacements for steel reinforcement.…”

Section: Introductionmentioning

confidence: 99%

An Analysis of Flexural Bond Length and Anchorage Length of Prestressed Fiber Reinforced Polymer Reinforcement

Jokūbaitis¹,

Valivonis²

2022

EPSTEM

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

Cited by 10 publications

References 16 publications

An Analysis of the Transfer Lengths of Different Types of Prestressed Fiber-Reinforced Polymer Reinforcement

An Analysis of the Transfer Lengths of Different Types of Prestressed Fiber-Reinforced Polymer Reinforcement

Analysis of cracking evolution mode of the monobloc sleeper

An Analysis of Flexural Bond Length and Anchorage Length of Prestressed Fiber Reinforced Polymer Reinforcement

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