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Structural Engineering and Mechanics Volume 62, Number 5, June10 2017 , pages 577-585 DOI: https://doi.org/10.12989/sem.2017.62.5.577 |
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The bending-shear-torsion performance of prestressed composite box beam |
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Hu S. Wei, Zhao K. Yu and Wei C. Jie
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| Abstract | ||
| To study the mechanical performances of prestressed steel-concrete composite box beam under combination of bending-shear-torsion, nine composite beams with different ratio of torsion to bending were designed. Torsion was applied to the free end of the beam with jacks controlled accurately with peripherals, as well as concentrated force on the mid-span with jacks. Based on experimental data and relative theories, mechanical properties of composite beams were analyzed, including torsional angle, deformation and failure patterns. The results showed that under certain ratio of torsion to bending, cracking and ultimate torsion increased and reached to its maximum at the ratio of 2. Three phases of process is also discussed, as well as the conditions of each failure mode. | ||
| Key Words | ||
| prestressed composite box beam; bending-shear-torsion performance; deflection; damage process | ||
| Address | ||
| Hu S. Wei, Zhao K. Yu and Wei C. Jie: Department of Materials and Structural Engineering, Nanjing Hydraulic Research Institute, 210029, Nanjing, P.R. China Hu S. Wei, Zhao K. Yu and Wei C. Jie: State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, 210098, Nanjing, P.R. China | ||