Capacity Analysis of Railway Concrete Sleeper

Bethel Lulu Gebeyehu


Railway is one of the most important reliable and widely used means of transportation and it convey freight, passengers, minerals, grain, etc and its infrastructure has been regaining their importance due to their efficiency and environmentally friendly technologies. This leads to increasing the train axel load, vehicle speed, track structure capacity and more frequent train usage. The demand for rail transport is derived with the possible exception of sight-seeing, people travel to satisfy another need at their destination and this increase the rail demand transportation. To accommodate the increase in rail demand, trac council council k structure is constructing a new railway line or improving the existing railroad structure. Upgrading the existing structure will increase its capacity and improving the existing structure more durable and reliable means of transportation. These improve the service provision to brought new challenge to the old railway track engineering. This challenge demanded for a better understanding of both static and dynamic response of track structure. Due to different loading condition, poor maintenance of the sleeper or poor quality of the ballast, unbalanced load distribution along the sleeper-ballast interference may occur. The Structural analysis of existing sleeper is carried out by using finite element method. The finite element analysis include dynamic and general static analysis. The parametric optimization of pre-stressed concrete sleeper is focused on increasing the capacity of the existing sleeper design through an investigation on pre-stress type, quantity, configuration, stress level and other materials properties. The study of parametric optimization indicate that increasing the existing sleeper capacity by changing the strand tendon diameter and compressive concrete strength.

Keywords: At transfer, at service, Jacking force, Pretension, Transfer length, Development length.

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ISSN (Paper)2224-5790 ISSN (Online)2225-0514

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