Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

The latest general information on the Coronavirus Disease 2019 (COVID-19) is available on the CDC website.

United States Department of Transportation United States Department of Transportation

Remaining Prestress Force and Center Negative Capacity of Ties Removed from Track after 25 Years

Document Series
Research Results
Author
Federal Railroad Administration
Report Number
RR 21-11
Office
RPD-31
Subject Track
Keywords
Infrastructure, railroad ties, residual prestress force, shape factor, prestressed concrete, high speed rail

This report highlights research conducted to determine the remaining (residual) prestress force in prestressed concrete ties that had performed well in track and were subsequently removed after 25 years of service. The team developed a new, direct tension test method to experimentally determine the residual prestress force in a concrete tie. The method used the entire tie as the test specimen rather than extrapolating the data from the response of one component, or region of the tie. This new approach minimized the effect of small measurement errors.


Last updated: Tuesday, May 11, 2021