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Long-term behavior of prestressed concrete beam with corrugated steel web under sustained load

  • Motlagh, Hamid Reza Ebrahimi (Department of Civil and Environmental Engineering, Amirkabir University of Technology (Tehran Polytechnic)) ;
  • Rahai, Alireza (Department of Civil and Environmental Engineering, Amirkabir University of Technology (Tehran Polytechnic))
  • Received : 2021.09.04
  • Accepted : 2022.04.18
  • Published : 2022.06.25

Abstract

This paper proposes a method to predict the deflection of prestressed concrete (PC) beams with corrugated steel web (CSW) under constant load concerning time-dependent variation in concrete material. Over time, the top and bottom concrete slabs subjected to asymmetric compression experience shrinkage and creep deformations. Here, the classical Euler-Bernoulli beam theory assumption that the plane sections remain plane is not valid due to shear deformation of CSW. Therefore, this study presents a method based on the first-order shear deformation to find the long-term deflection of the composite beams under bending by considering time effects. Two experimental prestressed beams of this type were monitored under their self-weight over time, and the theoretical results were compared with those data. Additionally, 3D analytical models of the experimental beams were used according to material properties, and the results were compared with two previous cases. There was good consistency between the analytical and numerical results with low error, which increased by wave radius. It is concluded that the proposed method could reliably be used for design purposes.

Keywords

Acknowledgement

The authors received no financial support for the research, authorship, and publication of this article.

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