Mapping the relationship between the structural deformation of a simply supported beam bridge and rail deformation in high-speed railways

Jiang, Lizhong; Zheng, Lan; Feng, Yulin; Lai, Zhipeng; Zhou, Wangbao

doi:10.1177/0954409719880668

Cited by 16 publications

(4 citation statements)

References 34 publications

(31 reference statements)

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“…4 Many studies have focused on the track deformation and stress regarding the effects of settlement on bridges. [5][6][7] Jiang et al 8,9 respectively investigated the mapping relationship between the deformations of a continuous bridge and a simply supported bridge and track geometry with analytical method. Gou et al 10 quantitatively evaluated track formation due to interlayer degradation and bridge deformations by using an analytical method.…”

Section: Introductionmentioning

confidence: 99%

Analysis of settlement thresholds for a new ballastless track-concrete box subgrade structure

Zhu,

Tang,

Zheng

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part F:

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In this paper, the effects of settlement on force, track deformation, and train dynamics to determine the settlement thresholds of ballastless track-concrete box subgrade (BTCBS) are studied. Firstly, this study introduces four settlement types, namely V-shape, box rolling, box faulting, and trapezoid settlement. The nonlinear finite element model (FEM) of BTCBS and the train-ballastless track-concrete box subgrade (TBTCBS) model considering nonlinear contact between track slabs and base slabs are established. Then, the effects of settlement on fastener force, track deformation, and vehicle dynamics are studied. According to the calculated results and China’s codes, the settlement limit values of BTCBS can be obtained. The results indicate that the settlement thresholds with box rolling and faulting are controlled by vertical force of fasteners, and the settlement limit values with V-shape and trapezoid settlement are controlled by 10 m chord versine of vertical irregularity (CVVI). The suggested settlement limit values of BTCBS for box faulting, box rolling, trapezoid, and V-shape settlement are respectively 2.48 mm, 2.55 mm, 17.43 mm, and 8.79 mm.

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Section: Introductionmentioning

confidence: 99%

Analysis of settlement thresholds for a new ballastless track-concrete box subgrade structure

Zhu,

Tang,

Zheng

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part F:

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“…The model test for the above problem would consume more time and money. A higher efficient method for solving prementioned problem is necessary, and some related works have been performed (Guo et al, 2018b; Jiang et al, 2020). Guo et al (2018a) established a mapping relationship model for the vertical deformation interaction of subgrade and track, which considered the contact condition of track slab and subgrade based on Winkler elastic foundation laminated beam theory.…”

Section: Introductionmentioning

confidence: 99%

Spatial mapping relationship model of subgrade disease and track geometry for high-Speed railway

Zhong

Zhang

2022

Advances in Structural Engineering

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A highly efficient and accurate mapping relationship model of subgrade disease and track geometry is significant for determining criterion of subgrade deformation and evaluating operation safety of High-speed Railway. In this paper, an innovative spatial mapping relationship model (SMRM) is proposed for describing track spatial geometry under subgrade disease of differential settlement and frost heave. Starting from analysing the theoretical interaction mechanism between subgrade and ballastless track, and presenting the flowchart of SMRM and its implementation process are described in detail. The good accuracy and applicability of SMRM method is verified based on the finite element model (FEM) and scale model experiment. The results indicate that it can better simulate the spatial characteristic of above mapping relationship than traditional theoretical model and avoid complicated and time-consuming FEM analysis process. It has high accuracy and reliability for the most application scenarios. The proposed method also can analyse the influences of others’ diseases on track geometry as long as the disease description function is available.

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“…These analysis results indicated the weakened energy dissipation capacity because of the fluctuating vertical load. Many more studies also pointed that the fluctuated axial load even separation of the rubber bearing of friction pendulum system could significant affect the seismic performance of the bridges (Wei et al 2014;Jiang et al 2020;Khoshnudian and Motamedi 2013).…”

Section: Introductionmentioning

confidence: 99%

Incremental dynamic analysis of the long-span continuous beam bridge considering the fluctuating frictional force of rubber bearing

Liao

Zeng

et al. 2021

ABEN

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In the seismic design of long-span bridges, the classic bi-linear model was used to simulate the frictional restoring force of the rubber bearings. However, in actual earthquake, the rubber bearing suffered fluctuating axial pressure in earthquake, even separated from the beam when vertical component of the earthquake was too strong. Employing the bi-linear model for the bearing may incorrectly estimate the seismic response of the bearings, as well as the whole bridge. This paper developed a nonlinear frictional bearing model, which can consider the variation of the frictional restoring force in the bearings, even the separation with the beam in vertical directions. A typical continuous beam bridge was modeled in ABAQUS, and incremental dynamic analysis was conducted for the quantitative comparison of the seismic responses using different bearing models. The intensity measure was selected as the ratio of the peak ground acceleration (PGA) in the vertical direction to the PGA in the horizontal direction. The analysis results indicated that the different bearing model led to the significant different seismic response for the bearings and piers, even the vertical component was small. The bi-linear bearing model would underestimate the seismic demand of the bearing and piers.

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Mapping the relationship between the structural deformation of a simply supported beam bridge and rail deformation in high-speed railways

Cited by 16 publications

References 34 publications

Analysis of settlement thresholds for a new ballastless track-concrete box subgrade structure

Analysis of settlement thresholds for a new ballastless track-concrete box subgrade structure

Spatial mapping relationship model of subgrade disease and track geometry for high-Speed railway

Incremental dynamic analysis of the long-span continuous beam bridge considering the fluctuating frictional force of rubber bearing

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