Interaction and multiscale mechanics

  • 제5권1호
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  • Pages.1-12
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  • 2012
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  • 1976-0426(pISSN)
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  • 2092-6200(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Effect of temperature gradient on track-bridge interaction

  • 투고 : 2011.08.16
  • 심사 : 2011.11.27
  • 발행 : 2012.03.25
⟨ 이전 논문 다음 논문 ⟩

초록

Considerable longitudinal rail forces and displacements may develop in continuous welded rail (CWR) track on long-span bridges due to temperature variations. The track stability may be disturbed due to excessive relative displacements between the sleepers and ballast bed and the accompanied reduction in frictional resistance. For high-speed tracks, however, solving these problems by installing rail expansion devices in the track is not an attractive solution as these devices may cause a local disturbance of the vertical track stiffness and track geometry which will require intensive maintenance. With reference to temperature, two actions are considered by the bridge loading standards, the uniform variation in the rail and deck temperature and the temperature gradient in deck. Generally, the effect of temperature gradient has been disregarded in the interaction analysis. This paper mainly deals with the effect of temperature gradient on the track-bridge interaction with respect to the support reaction, rail stresses and stability. The study presented in this paper was not mentioned in the related codes so far.

키워드

참고문헌

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피인용 문헌

  1. Recent development of design and construction of medium and long span high-speed railway bridges in China vol.74, 2014, https://doi.org/10.1016/j.engstruct.2014.05.052
  2. Long-term monitoring of steel railway bridge interaction with continuous welded rail vol.99, 2014, https://doi.org/10.1016/j.jcsr.2014.04.009
  3. Effect of temperature difference load of 32 m simply supported box beam bridge on track vertical irregularity vol.23, pp.4, 2015, https://doi.org/10.1007/s40534-015-0090-2
  4. Structural behavior analysis of a continuous steel truss arch railway bridge integrating monitoring data vol.9, pp.1, 2017, https://doi.org/10.1177/1687814016683316
  5. Effective Method for Diagnosing Continuous Welded Track Condition Based on Experimental Research vol.14, pp.10, 2012, https://doi.org/10.3390/en14102889
  6. Stability of continuous welded rail on steel bridge subjected to thermal loading vol.34, pp.None, 2012, https://doi.org/10.1016/j.istruc.2021.10.050