Structural Engineering and Mechanics

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Mechanical performance and design optimization of rib-stiffened super-wide bridge deck with twin box girders in concrete

  • Wen, Xiong (Department of Bridge Engineering, School of Transportation, Southeast University) ;
  • Ye, Jianshu (Department of Bridge Engineering, School of Transportation, Southeast University) ;
  • Gai, Xuemei (Department of Bridge Engineering, School of Transportation, Southeast University) ;
  • Cai, C.S. (Department of Civil and Environmental Engineering, Louisiana State University)
  • Received : 2013.05.17
  • Accepted : 2013.10.26
  • Published : 2013.11.10
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Abstract

The present study fundamentally investigated the mechanical performance of the rib-stiffened super-wide bridge deck with twin box girders in concrete, which is a very popular application to efficiently widen the bridges with normal span. The shear lag effects of the specific cross-sections were firstly studied. The spatial stress distribution and local stiffness of the bridge deck with twin box girders were then investigated under several typical wheel load conditions. Meanwhile, a comparative study for the bridge deck with and without stiffening ribs was also carried out during the investigation; thereby, a design optimization for the stiffening ribs was further suggested. Finally, aiming at the preliminary design, an approximate methodology to manually calculate the bending moments of the rib-stiffened bridge deck was analytically proposed for engineers to quickly assess its performance. This rib-stiffened bridge deck with twin box girders can be widely applied for concrete (especially concrete cable-stayed) bridges with normal span, however, requiring a super-wide bridge width due to the traffic flow.

Keywords

References

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  2. Static Experiment on Mechanical Behavior of Innovative Flat Steel Plate-Concrete Composite Slabs vol.18, pp.2, 2018, https://doi.org/10.1007/s13296-018-0012-3