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Structural Engineering and Mechanics Volume 75, Number 5, September10 2020 , pages 595-605 DOI: https://doi.org/10.12989/sem.2020.75.5.595 |
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Flexural behaviors of full-scale prestressed high-performance concrete box girders |
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Hongye Gou, Jie Gu, Zhiwen Ran, Yi Bao, and Qianhui Pu
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| Abstract | ||
| In this study, the flexural behaviors of full-scale prestressed concrete box girders are experimentally investigated. Four girders were fabricated using two types of concrete (compressive strengths: 50 MPa and 70 MPa) and tested under four-point bending until failure. The measured parameters included the deflection, the stress and strain in concrete and steel bars, and cracks in concrete. The measurement results were used to analyze the failure mode, load-bearing capacity, and deformability of each girder. A finite element model is established to simulate the flexural behaviors of the girders. The results show that the use of high-performance concrete and reasonable combination of prestressed tendons could improve the mechanical performance of the box girders, in terms of the crack resistance, load-carrying capacity, stress distribution, and ductility. | ||
| Key Words | ||
| box girder; flexural behavior; full-scale failure test; finite element analysis; high performance concrete | ||
| Address | ||
| Hongye Gou: 1 Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China 2 Key Laboratory of High-Speed Railway Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China Qianhui Pu: 1Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China Jie Gu: Graduate School of Tangshan, Southwest Jiaotong University, Tangshan, Hebei 063000, China Yi Bao: Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology, Hoboken, NJ 07030, USA | ||