Influence of prestress losses on the dynamic over static capacity ratios of railway concrete sleepers

Chayut Ngamkhanong, Sakdirat Kaewunruen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

45 Downloads (Pure)

Abstract

Railway sleeper, which is placed underneath the rail, is one of the main components of railway track. Railway sleepers can be made of timber, concrete, composite materials etc. Prestressed concrete sleeper is one of the most popular types which can be seen in railway track all over the world. However, loss of prestress is a significant concern as it can affect strength of member and its serviceability including stresses in concrete, cracking etc. In prestressed concrete applications, the most important variable is the prestressing force. It was observed that the prestressing force can be reduced with time because of several factors such as creep and shrinkage of concrete, steel relaxation, friction loss, anchorage slip etc. RESPONSE2000 was used to evaluate the static and dynamic capacities based on the modified compression field theory. The study results exhibit that the losses of prestress have significant effects on the overall strength of prestressed concrete sleepers. It is recommended to take into account the effect of prestress losses in standard design of prestressed concrete sleepers.
Original languageEnglish
Title of host publicationSynerCrete’18 International Conference on Interdisciplinary Approaches
Place of PublicationParis France
PublisherRILEM Publications S.A.R.L.
Pages925-930
Number of pages6
ISBN (Electronic)978-2-35158-203-9
ISBN (Print)978-2-35158-202-2
DOIs
Publication statusPublished - 26 Oct 2018
Event
SynerCrete'18
- Funchal, Funchal, Portugal
Duration: 24 Oct 201826 Oct 2018
https://synercrete.com

Conference

Conference
SynerCrete'18
Country/TerritoryPortugal
CityFunchal
Period24/10/1826/10/18
Internet address

Keywords

  • railway
  • prestress
  • loss
  • concrete sleepers
  • dynamic capacity
  • static capacity

Fingerprint

Dive into the research topics of 'Influence of prestress losses on the dynamic over static capacity ratios of railway concrete sleepers'. Together they form a unique fingerprint.

Cite this