Steel and Composite Structures

  • 제36권4호
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  • Pages.481-492
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  • 2020
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  • 1229-9367(pISSN)
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  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
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Mapped relationships between pier settlement and rail deformation of bridges with CRTS III SBT

  • Jiang, Lizhong (School of Civil Engineering, Central South University) ;
  • Liu, Lili (School of Civil Engineering, Central South University) ;
  • Zhou, Wangbao (School of Civil Engineering, Central South University) ;
  • Liu, Xiang (School of Civil Engineering, Central South University) ;
  • Liu, Chao (School of Civil Engineering, Central South University) ;
  • Xiang, Ping (School of Civil Engineering, Central South University)
  • 투고 : 2019.12.19
  • 심사 : 2020.08.08
  • 발행 : 2020.08.25
⟨ 이전 논문 다음 논문 ⟩

초록

To study the rail mapped deformation caused by the pier settlement of simply - supported bridges with China Railway Track System III (CRTS III) slab ballastless track (SBT) system under the mode of non-longitudinal connection ballastless track slab, this study derived an analytical solution to the mapped relationships between pier settlement and rail deformation based on the interlayer interaction mechanism of rail-pier and principle of stationary potential energy. The analytical calculation results were compared with the numerical results obtained by ANSYS finite element calculation, thus verifying the accuracy of analytical method. A parameter analysis was conducted on the key factors in rail mapped deformation such as pier settlement, fastener stiffness, and self-compacting concrete (SCC) stiffness of filling layer. The results indicate that rail deformation is approximately proportional to pier settlement. The smaller the fastener stiffness, the smoother the rail deformation curve and the longer the rail deformation area is. With the increase in the stiffness of SCC filling layer, the maximum positive deformation of rail gradually decreases, and the maximum negative deformation gradually increases. The deformation of rail caused by the pier settlement of common-span bridge structures will generate low-frequency excitation on high-speed trains.

키워드

과제정보

The research described in this paper was financially supported by the National Natural Science Foundation of China (51778630, U1934207), Hunan Innovative Provincial Construction Project (2019RS3009).

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피인용 문헌

  1. Application of KLE-PEM for Random Dynamic Analysis of Nonlinear Train-Track-Bridge System vol.2020, 2020, https://doi.org/10.1155/2020/8886737