Steel and Composite Structures

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Comparison of long-term behavior between prestressed concrete and corrugated steel web bridges

  • Zhan, Yulin (Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University) ;
  • Liu, Fang (Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University) ;
  • Ma, Zhongguo John (Department of Civil and Environmental Engineering, University of Tennessee) ;
  • Zhang, Zhiqiang (Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University) ;
  • Duan, Zengqiang (Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University) ;
  • Song, Ruinian (Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University)
  • Received : 2018.01.20
  • Accepted : 2019.03.09
  • Published : 2019.03.25
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Abstract

Prestressed concrete (PC) bridges using corrugated steel webbing have emerged as one of the most promising forms of steel-concrete composite bridge. However, their long-term behavior is not well understood, especially in the case of large-span bridges. In order to study the time-dependent performance, a large three-span PC bridge with corrugated steel webbing was compared to a similar conventional PC bridge to examine their respective time-dependent characteristics. In addition, a three-dimensional finite element method with step-by-step time integration that takes into account cantilever construction procedures was used to predict long-term behaviors such as deflection, stress distribution and prestressing loss. These predictions were based upon four well-established empirical creep prediction models. PC bridges with a corrugated steel web were observed to have a better long-term performance relative to conventional PC bridges. In particular, it is noted that the pre-cambering for PC bridges with a corrugated steel web could be smaller than that of conventional PC bridges. The ratio of side-to-mid span has great influence on the long-term deformation of PC bridges with a corrugated steel web, and it is suggested that the design value should be between 0.4 and 0.6. However, the different creep prediction models still showed a weak homogeneity, thus, the further experimental research and the development of health monitoring systems are required to further progress our understanding of the long-term behavior of PC bridges with corrugated steel webbing.

Keywords

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