Steel and Composite Structures

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Experimental study on long-term behavior of prestressed steel I-beam-concrete composite beams

  • Sung, Deokyong (Department of Civil and Railroad Engineering, Daewon University College) ;
  • Hong, Seongwon (Department of Safety Engineering, Korea National University of Transportation)
  • Received : 2021.04.13
  • Accepted : 2022.03.07
  • Published : 2022.03.10
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Abstract

To investigate and predict the long-term time-dependent behavior, such as creep, shrinkage, and relaxation of PS strands, and prestress loss in prestressed steel-concrete composite beams, named Precom, full-scale tests were conducted and the collected data were compared with those obtained from the two proposed analytical models. The combined effective modulus method (EMM)-empirical model proposed with a flowchart considered the creep effect to determine the prestress loss. Conversely, the age-adjusted effective modulus method (AEMM) with CEB-FIP equation was developed to account for the concrete aging. The results indicated that the AEMM with CEB-FIP model predicts the long-term behavior of Precom effectively.

Keywords

Acknowledgement

This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2021R1A4A2001964) and was also supported by the Young Researcher Program through the National Research Foundation of Korea(NRF) funded by the Korea government (MSIP; Ministry of Science, ICT & Future Planning) (2021R1C1C1010087). The views expressed are the authors and do not necessarily represent those of the sponsors.

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