A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Acoustic emission behaviour of prestressed concrete sleepers under quasi homologation testing
Prestressed concrete sleepers (PCS) play a key role in providing lateral, longitudinal and vertical stability of railway track systems. Its capacity to fulfill these tasks is principally examined through "homologation" tests based on crack initiation and propagation. However, the current classical technique for crack detection by use of a graduated microscope inspects only the surface while its accuracy is limited. Additionally it does not offer insight on the cause of cracking in such a heterogeneous medium as prestressed concrete. The present work aims at studying the behaviour of PCS under quasi-static homologation testing based on acoustic emission (AE) parameters. The AE technique is used to determine the onset of cracking, while indices like the calm and felicity ratios demonstrate the evolution of damage for the successive loading steps. AE waveform parameters are also studied in relation to the possible fracture mechanisms i.e. matrix cracking or interface friction while AE activity is correlated to the crack width. It is demonstrated that AE technique can substantially contribute to the characterization of die damage process of PCS.
Acoustic emission behaviour of prestressed concrete sleepers under quasi homologation testing
Prestressed concrete sleepers (PCS) play a key role in providing lateral, longitudinal and vertical stability of railway track systems. Its capacity to fulfill these tasks is principally examined through "homologation" tests based on crack initiation and propagation. However, the current classical technique for crack detection by use of a graduated microscope inspects only the surface while its accuracy is limited. Additionally it does not offer insight on the cause of cracking in such a heterogeneous medium as prestressed concrete. The present work aims at studying the behaviour of PCS under quasi-static homologation testing based on acoustic emission (AE) parameters. The AE technique is used to determine the onset of cracking, while indices like the calm and felicity ratios demonstrate the evolution of damage for the successive loading steps. AE waveform parameters are also studied in relation to the possible fracture mechanisms i.e. matrix cracking or interface friction while AE activity is correlated to the crack width. It is demonstrated that AE technique can substantially contribute to the characterization of die damage process of PCS.
Acoustic emission behaviour of prestressed concrete sleepers under quasi homologation testing
Omondi, Benard (author) / Aggelis, Dimitrios G. (author) / Sol, Hugo (author) / Sitters, Cox (author)
2014
9 Seiten, Bilder, 19 Quellen
Conference paper
Storage medium
English
Engineering Index Backfile | 1946
Fatigue resistance of prestressed concrete sleepers
| British Library Conference Proceedings | 1995
Prestressed Concrete Sleepers: Failure Investigation Case Study
| TIBKAT | 2020
Structural safety of railway prestressed concrete sleepers
| Online Contents | 2008