An Analytical Solution for the Geometry of High-Speed Railway CRTS Ⅲ Slab Ballastless Track

Lili Liu, Lizhong Jiang, Wangbao Zhou (), Xiang Liu and Yulin Feng
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Lili Liu: School of Civil Engineering, Central South University, Changsha 410075, China
Lizhong Jiang: School of Civil Engineering, Central South University, Changsha 410075, China
Wangbao Zhou: School of Civil Engineering, Central South University, Changsha 410075, China
Xiang Liu: School of Civil Engineering, Fujian University of Technology, Fuzhou 350118, China
Yulin Feng: School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, China

Mathematics, 2022, vol. 10, issue 18, 1-19

Abstract: To study the mapping relationship between girder deformation and rail deformation for the CRTS Ⅲ slab ballastless track (SBT) multi-span simply supported bridge, this study derived a simplified analytical solution, and the corresponding ANSYS finite element model (AFEM) was established. Compared with the fine analytical model (FAM) and the AFEM, the calculation results of the three models under the conditions of pier settlement and girder vertical fault were compared, which verified the universal properties of the simplified analytical model (SAM). Based on the verified SAM, the influence of pier settlement, fastener stiffness, girder span, and girder vertical fault on rail deformation was studied. The results show that the rail deformation is approximately proportional to pier settlement and girder vertical fault. With the increase in fastener stiffness, the fastener internal force increases, the rail mapping deformation increases, and the length of the rail mapping deformation area decreases. With the increase in girder span, the rail deformation curve becomes smooth, the length of the rail mapping deformation area becomes longer, and the fastener internal force is significantly reduced.

Keywords: CRTS ? SBT system; mapping deformation; principle of stationary potential energy; analytical model; numerical simulation (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2022
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