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Full-Text Articles in Engineering
Foundation Design For High Tension Cable Guardrails, John R. Rohde Ph.D., P.E., Ling Zhu Ph.D., Ryan J. Terpsma B.S.M.E
Foundation Design For High Tension Cable Guardrails, John R. Rohde Ph.D., P.E., Ling Zhu Ph.D., Ryan J. Terpsma B.S.M.E
Mid-America Transportation Center: Final Reports and Technical Briefs
High tension cable guardrail is becoming increasing popular in median and roadside applications due to the promise of reduced deflections upon impact and reduced maintenance. As the performance of these systems is observed in service, there is a growing concern over the end anchorage foundation performance of current systems. Foundations for high tension systems must not only be capable of restraining the impact load of a vehicle but must also restrain the initial pretension on the cable system as well as temperature induced loads. While it may be acceptable for many roadside safety devices to require foundation repair after impact, …
Transfer And Development Length Of Strands In Post-Tensioned Members After Anchor Head Failure, Elie El Zghayar
Transfer And Development Length Of Strands In Post-Tensioned Members After Anchor Head Failure, Elie El Zghayar
Electronic Theses and Dissertations
Post-tensioning tendons in segmental bridge construction are often only anchored within the deviator and pier segments. The effectiveness of the post-tensioning (PT) system is therefore dependent on proper functioning of the anchorages. On August 28, 2000 a routine inspection of the Mid-Bay Bridge (Okaloosa County, Florida) revealed corrosion in numerous PT tendons. Moreover, one of the 19-strand tendons was completely slacked, with later inspection revealing a corrosion-induced failure at the pier anchor location. Anchorage failure caused all PT force to transfer to the steel duct located within the pier segment that in turn slipped and caused the tendon to go …