CONTACT US: Contact info
|
Citation |
Yang WS, Bendana LJ, Bruno NJ, Kenyon WD. Transp. Res. Rec. 1993; 1419: 9-20. |
|
Copyright |
(Copyright © 1993, Transportation Research Board, National Research Council, National Academy of Sciences USA, Publisher SAGE Publishing) |
|
DOI |
unavailable |
PMID |
unavailable |
|
Abstract |
Cable guiderail with insufficient tension may deflect excessively on impact, allowing vehicles to contact fixed objects behind the barrier. In 1980 a two-phase study was initiated by the New York State Department of Transportation to investigate causes of tension loss in cable guiderail and formulate corrective measures. The study's first phase documented performance of new cable barriers in the field and the results of laboratory testing. Anchor movement and permanent cable stretch were identified as major causes of tension loss, sufficient to affect barrier performance adversely. Several changes have already been made based on these results: construction specifications and standard sheets were changed to ensure proper soil compaction and better initial and long-term cable tension. In the second phase, field performance of selected improved installations was documented from 1984 to 1987. In addition, prestressed cable was used on some projects in 1985 to investigate its effectiveness in reducing tension loss due to cable stretch. Laboratory stretch tests were conducted using normal and prestretched cable to determine any significant differences appearing in cable strain due to long-term loading. Language: en |