Structural Crack Identification in Railway Prestressed Concrete Sleepers Using Dynamic Mode Shapes

Commentary: Fatigue Life Assessment Method for Prestressed Concrete Sleepers

Fatigue Life Assessment Method for Prestressed Concrete Sleepers

Railway Engineering Institute, China Academy of Railway Sciences, Beijing, China, Birmingham Centre for Railway Research and Education, School of Civil Engineering, The University of Birmingham, Edgbaston, United Kingdom, Department of Civil Engineering, Riga Technical University, Riga, Latvia, Department of Civil Engineering, School of Engineering, The University of Birmingham, Birmingham, Uni...

Investigation on simulation of train loading on prestressed concrete sleepers

Railway concrete sleepers have been developed and utilized in railway industry for over 50 years. Cyclic loading because of vibration on sleepers due to the train loading and the velocity of train itself and also a small percentage of bad wheels, can eventually lead to a crack network and failure of component. The objective of this study is to investigate the load carrying capacity of the selec...

Part A- Experimental: Experimental Analysis of Crack Propagation in Pre-stressed Concrete Sleepers by Fracture Mechanics

This study investigates propagation of mode I crack in B70 pre-stressed concrete sleepers by fracture mechanics approach. A new experimental analysis is done for notched B70 pre-stressed concrete sleepers with Replica test and image analysis. A scanning electron microscope test (SEM) and an image analysis are applied for the Replica test in order to determine crack length and crack mouth openin...

Identification of ungrouted tendon duct in prestressed concrete by SIBIE

In the impact-echo method, the presence and the locations of defects in concrete are estimated from identifying peak frequencies in the frequency spectra, which are responsible for the resonance due to time-of-flight from the defects. In practical applications, however, spectra obtained include so many peak frequencies that it is fairly difficult to identify the defects correctly. SIBIE (Stack ...