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A Numerical Study on Structural Performance of Railway Sleepers Using Ultra High-Performance Concrete (UHPC).

Moochul Shin¹, Younghoon Bae², Sukhoon Pyo³

¹Department of Civil and Environmental Engineering, Western New England University, Springfield, MA 01119, USA.

Materials (Basel, Switzerland)

|June 2, 2021

Summary

This study numerically analyzed ultra-high-performance concrete (UHPC) railway sleepers. Larger cross-sections significantly improve performance, but engineers should consider efficiency and economics for optimal design.

Keywords:

numerical simulation railway sleeper static bending test structural performance ultra high-performance concrete (UHPC)

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Area of Science:

Civil Engineering
Materials Science
Structural Engineering

Background:

Railway sleepers are critical infrastructure components.
Ultra-high-performance concrete (UHPC) offers superior mechanical properties for structural applications.
Optimizing sleeper design is essential for railway safety and cost-effectiveness.

Purpose of the Study:

To numerically investigate the structural performance of UHPC railway sleepers.
To identify key design parameters influencing sleeper performance.
To propose an economical design factor for UHPC sleepers.

Main Methods:

Development of numerical UHPC sleeper models.
Validation of models using experimental force-crack width data.
Parametric study on steel fiber content, cross-section size, and prestressing (PS) tendon properties.

Main Results:

Cross-section size demonstrated the most significant impact on UHPC sleeper performance.
Steel fiber content and PS tendon diameter had moderate effects.
Yielding strength of PS tendons showed minimal influence on overall performance.

Conclusions:

UHPC is a viable material for high-performance railway sleepers.
Cross-section dimensions are the primary design factor for optimizing performance.
A balance between performance and economic considerations is crucial for practical sleeper design, necessitating an economical design factor.