Structural Engineering and Mechanics

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In-situ dynamic loading test of a hybrid continuous arch bridge

  • Gou, Hongye (Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University) ;
  • Li, Liang (Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University) ;
  • Hong, Yu (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)
  • Received : 2019.01.22
  • Accepted : 2021.02.19
  • Published : 2021.03.25
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Abstract

In this study, the dynamic behavior of a three-span hybrid continuous arch bridge under vehicle loading is investigated. The natural vibration characteristics of the bridge were analyzed through pulsation test. In the dynamic loading test, the vibrations of the bridge under different truck speeds and different pavement conditions were tested, and time histories of deflection and acceleration of the bridge were measured. Based on the dynamic loading test, the impact coefficient was analyzed. The results indicate that the pavement smoothness had more impacts on the vibration of the bridge than the truck's speed. The vertical damping of the bridge under the excitation of the trucks is larger than the transverse damping. Resonance occurs at the side span of the bridge under a truck at 10 km/h.

Keywords

References

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