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Steel and Composite Structures Volume 30, Number 6, March25 2019 , pages 535-550 DOI: https://doi.org/10.12989/scs.2019.30.6.535 |
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Comparison of long-term behavior between prestressed concrete and corrugated steel web bridges |
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Yulin Zhan, Fang Liu, Zhongguo John Ma, Zhiqiang Zhang, Zengqiang Duan and Ruinian Song
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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 largespan 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 threedimensional 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. | ||
| Key Words | ||
| long-term behavior; prestressed concrete; corrugated steel web; bridge; numerical simulation; creep prediction | ||
| Address | ||
| (1) Yulin Zhan, Fang Liu, Zhiqiang Zhang, Zengqiang Duan, Ruinian Song: Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University, Sichuan 610031, China; (2) Zhongguo John Ma: Department of Civil and Environmental Engineering, University of Tennessee, Knoxville, John D.Tickle, TN 37996-2313, USA. | ||