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Instrumentation of the Twelvemile Bridge (Revised); Research rept
| 题名： | Instrumentation of the Twelvemile Bridge (Revised); Research rept |
| 作者： | Hopwood, T.; Hunsucker, D. Q.; Courtney, E. E. |
| 关键词： | Highway bridges; Reinforced concrete; Stress analysis; Instrumentation; Bridge tests; Concrete structures; Girders; Strain gages; Curing; Beams; Highway construction; Compressive strength; Structural analysis; Structural failure; Strain(Mechanics); Creep properties; Nondestructive tests |
| 摘要： | An experimental precast, post-tensioned concrete segmental girder bridge over Twelvemile Creek in Campbell County was instrumented with stress and strain sensors. Those sensors were read during beam fabrication and the initial portion of construction. The study and bridge were not completed as originally designed due to a beam failure during post-tensioning. A variety of stress, strain, and deflection measuring techniques were to be employed during the study. Several of those including concrete stress and strain meters, and vibrating-wire strain gages were embedded in beams and one pier cap. Concrete maturity meters were also employed to determine temperature-time relationships with increases in curing strength for concrete used in the pier caps and in one beam. Compressive strength and modulus tests were also performed on test cylinders obtained from the pier and beam concrete. This report describes the progress of the field instrumentation and laboratory work to the termination of the study. The study was terminated due to the failure of a beam during erection. The bridge was completed using conventional steel girders. |
| 总页数： | 33p |
| 报告类型： | 科技报告 |
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