During January 2013, concrete railroad ties were cast at a tie manufacturing plant with fifteen different reinforcement types that are widely employed in manufacturing of railroad ties worldwide. Among these reinforcements; there were 12 different 5.32 mm diameter wires with various surface indent geometries, two different 7-wire strands with 3/8-inch diameter, and one 3-wire strand with 5/16-inch diameter. Four concrete ties were cast for each reinforcement type for a total of 60 concrete ties. Among the four ties for each reinforcement type, two ties were installed in track and subjected to a cumulative in-track loading of 85 million gross tons (MGT). Before being subjected to this loading, special surface preparation was done on the ties to protect the strain measuring points on the bottom surface of the ties from surface abrasion during loading. The other two ties, which are companion ties for each reinforcement type, were not subjected to any loading. Surface strains of concrete railroad ties were measured at three different stages after prestress transfer: immediately after prestress transfer, one year after prestress before ties subjected to loading (January 2014), and after half of the ties were subjected to 85 million gross tons loading (August 2014). Transfer lengths were calculated at all these stages from the measured surface strain values and are presented here. Transfer length results are compared between the ties subjected to loading and the ties not subjected to loading, along with detailed explanation of results.
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2015 Joint Rail Conference
March 23–26, 2015
San Jose, California, USA
Conference Sponsors:
- Rail Transportation Division
ISBN:
978-0-7918-5645-1
PROCEEDINGS PAPER
Transfer Length Measurements in Pretensioned Concrete Railroad Ties Under Rail Loads Available to Purchase
B. Terry Beck,
B. Terry Beck
Kansas State University, Manhattan, KS
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Naga Narendra B. Bodapati,
Naga Narendra B. Bodapati
Kansas State University, Manhattan, KS
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Robert J. Peterman,
Robert J. Peterman
Kansas State University, Manhattan, KS
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Amir Farid Momeni,
Amir Farid Momeni
Kansas State University, Manhattan, KS
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Chih-Hang John Wu
Chih-Hang John Wu
Kansas State University, Manhattan, KS
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B. Terry Beck
Kansas State University, Manhattan, KS
Naga Narendra B. Bodapati
Kansas State University, Manhattan, KS
Robert J. Peterman
Kansas State University, Manhattan, KS
Amir Farid Momeni
Kansas State University, Manhattan, KS
Chih-Hang John Wu
Kansas State University, Manhattan, KS
Paper No:
JRC2015-5690, V001T01A018; 8 pages
Published Online:
June 10, 2015
Citation
Beck, BT, Bodapati, NNB, Peterman, RJ, Momeni, AF, & Wu, CJ. "Transfer Length Measurements in Pretensioned Concrete Railroad Ties Under Rail Loads." Proceedings of the 2015 Joint Rail Conference. 2015 Joint Rail Conference. San Jose, California, USA. March 23–26, 2015. V001T01A018. ASME. https://doi.org/10.1115/JRC2015-5690
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