Structural Engineering and Mechanics

  • 제75권5호
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  • Pages.595-605
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  • 2020
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Flexural behaviors of full-scale prestressed high-performance concrete box girders

  • Gou, Hongye (Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University) ;
  • Gu, Jie (Graduate School of Tangshan, Southwest Jiaotong University) ;
  • Ran, Zhiwen (Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University) ;
  • Bao, Yi (Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology) ;
  • Pu, Qianhui (Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University)
  • 투고 : 2019.04.13
  • 심사 : 2020.03.20
  • 발행 : 2020.09.10
⟨ 이전 논문 다음 논문 ⟩

초록

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.

키워드

과제정보

The research was funded by the National Natural Science Foundation of China (Grant No. 51878563), the Sichuan Science and Technology Program (Grant No. 2018JY0294 and 2018JY0549), and the Ministry of Science and Technology of China (Grant No. KY201801005).

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