An analytical solution to the mapping relationship between bridge structures vertical deformation and rail deformation of high-speed railway

Yulin Feng; Lizhong Jiang; Wangbao Zhou; Zhipeng Lai; Xilin Chai

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자료유형: 학술저널

저자정보: Yulin Feng (Central South University) Lizhong Jiang (Central South University) Wangbao Zhou (Central South University) Zhipeng Lai (Central South University) Xilin Chai (Central South University)

저널정보: 국제구조공학회 Steel and Composite Structures, An International Journal Steel and Composite Structures, An International Journal Vol.33 No.2

발행연도: 2019.1

수록면: 209 - 224 (16page)

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This paper describes a study of the mapping relationship between the vertical deformation of bridge structures and rail deformation of high-speed railway, taking the interlayer interactions of the bridge subgrade CRTS II ballastless slab track system (HSRBST) into account. The differential equations and natural boundary conditions of the mapping relationship between the vertical deformation of bridge structures and rail deformation were deduced according to the principle of stationary potential energy. Then an analytical model for such relationship was proposed. Both the analytical method proposed in this paper and the finite element numerical method were used to calculate the rail deformations under three typical deformations of bridge structures and the evolution of rail geometry under these circumstances was analyzed. It was shown that numerical and analytical calculation results are well agreed with each other, demonstrating the effectiveness of the analytical model proposed in this paper. The mapping coefficient between bridge structure deformation and rail deformation showed a nonlinear increase with increasing amplitude of the bridge structure deformation. The rail deformation showed an obvious "following feature"; with the increase of bridge span and fastener stiffness, the curve of rail deformation became gentler, the track irregularity wavelength became longer, and the performance of the rail at following the bridge structure deformation was stronger.

#high-speed railway #bridge structure #analytical model #mapping relationship

참고문헌 (38)

참고문헌 신청

Bengi Arisoy / 2018 / Finite element model calibration of a steel railway bridge via ambient vibration test / Steel and Composite Structures, An International Journal 27(3):327~335

B. Biondi / 2005 / A substructure approach for the dynamic analysis of train–track–bridge system / Computers & Structures 83(28-30):2271~2281

Cai, X. / 2014 / Effect of land subsidence on regularity of double-block ballastless track / Eng. Mech 31(9):160~165

Chen, Z. / 2015 / Safety threshold of high-speed railway pier settlement based on train-track-bridge dynamic interaction / Sci. China : Technol. Sci 58(2):202~210

Chen, Z. / 2018 / Study on the safe value of multi-pier settlement for simply supported girder bridges in high-speed railways / Struct. Infrastruct. E 14(3):400~410

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