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A Numerical Study To Evaluate Dynamic Responses Of Voided Concrete Railway Sleepers To Impact Loading, Sakdirat Kaewunruen, Alexander Remennikov, Akira Aikawa
A Numerical Study To Evaluate Dynamic Responses Of Voided Concrete Railway Sleepers To Impact Loading, Sakdirat Kaewunruen, Alexander Remennikov, Akira Aikawa
Alex Remennikov
The prestressed concrete railway sleepers (or railroad ties), which are installed in railway track systems as the crosstie beam support, are designed to carry and transfer the wheel loads from the rails to the ground. It is well known that railway tracks are subject to impact loading conditions, which are attributable to the train operations with either wheel or rail abnormalities such as flat wheels, dipped rails, etc. These loads are of very high magnitude but short duration. In many cases, it has been reported from the fields that concrete sleepers are lacking of support due to mud pumping or …
Dynamic Properties Of Railway Track And Its Components : A State-Of-The-Art Review, Sakdirat Kaewunruen, Alexander Remennikov
Dynamic Properties Of Railway Track And Its Components : A State-Of-The-Art Review, Sakdirat Kaewunruen, Alexander Remennikov
Alex Remennikov
Recent findings indicate one of major causes of damages, which is attributed to the resonant behaviours, in a railway track and its components. Basically, when a railway track is excited to generalised dynamic loading, the railway track deforms and then vibrates for certain duration. Dynamic responses of the railway track and its components are the key to evaluate the structural capacity of railway track and its components. If a dynamic loading resonates the railway track’s dynamic responses, its components tend to have the significant damage from excessive dynamic stresses. For example, a rail vibration could lead to defects in rails …
Non-Destructive Evaluation For Dynamic Integrity Of Railway Track Structure, Sakdirat Kaewunruen, Alexander Remennikov
Non-Destructive Evaluation For Dynamic Integrity Of Railway Track Structure, Sakdirat Kaewunruen, Alexander Remennikov
Alex Remennikov
In-field testing for structural integrity using dynamic non-destructive investigation of ballasted railway track structures was carried out and is presented in this paper. A non-destructive technique, ‘modal analysis’, was utilised in this investigation. The railway track structures were dynamically excited using an impact excitation instrumented hammer. Due to the nature of railway track structures that they extrude for a long distance, the transient excitation was given randomly at several local areas. Acceleration responses in time domain were recorded using an accelerometer mounting on the railhead. The frequency response functions (FRFs) can be obtained via the PULSE FFT Analyser. The analytical …