Computers and Concrete

  • 제17권2호
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  • Pages.241-253
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  • 2016
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  • 1598-8198(pISSN)
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  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Effect of prestressing on the natural frequency of PSC bridges

  • 투고 : 2015.10.08
  • 심사 : 2015.12.05
  • 발행 : 2016.02.25
⟨ 이전 논문 다음 논문 ⟩

초록

Depending on the researcher, the effect of prestressing on the natural frequency of a PSC (prestressed concrete) structure appear to have been interpreted differently. Most laboratory tests on PSC beams available showed that the natural frequency is increased appreciably by prestressing. On the other hand, some other references based on field experience argued that the dynamic response of a PSC structure does not change regardless of the prestressing applied. Therefore, the deduced conclusions are inconsistent. Because an experiment with and without prestressing is a difficult task on a full size PSC bridge, the change in natural frequency of a PSC bridge due to prestressing may not be examined through field measurements. The study examined analytically the effects of prestressing on the natural frequency of PSC bridges. A finite element program for an undamped dynamic motion of a beam-tendon system was developed with additional geometric stiffness. The analytical results confirm that a key parameter in changing the natural frequency due to prestressing is the relative ratio of prestressing to the total weight of the structure rather than the prestressing itself.

키워드

과제정보

연구 과제 주관 기관 : National Research Foundation of Korea (NRF)

참고문헌

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피인용 문헌

  1. Effects of Modeling Parameters on Dynamic Performance of Railway PSC Bridge Girders vol.19, pp.6, 2019, https://doi.org/10.1007/s13296-019-00243-1
  2. Unified calculation model for the longitudinal fundamental frequency of continuous rigid frame bridge vol.77, pp.3, 2021, https://doi.org/10.12989/sem.2021.77.3.343
  3. Aspects of Vibration-Based Methods for the Prestressing Estimate in Concrete Beams with Internal Bonded or Unbonded Tendons vol.6, pp.6, 2021, https://doi.org/10.3390/infrastructures6060083