Mapping thermal deformations of long-span arch bridge to CRTS Type I double-block ballastless tracks in high-speed railways

Hongye Gou, Hairong Ren, Fei Hu, Qianhui Pu, Xuguang Wen and Yi Bao

Abstract

The geometry change of railway tracks significantly influences the safety and ride comfort of high-speed trains. This paper presents an analytical method to map the thermal deformations of a long-span arch bridge to the geometry of CRTS Type I double-block ballastless tracks for high-speed railways. A mechanical model of the bridge-track coupled system was developed to derive analytical formulae of the deformations of the track. The analytical formulae explicitly consider the mechanical properties of the bridge-track coupled system and the temperature profile. A three-dimensional finite element model was established to evaluate the predictions obtained from the analytical formulae. The results show that the analytical formulae provide accurate predictions of the track deformations caused by the thermal deformations of bridges. This research will promote the design, evaluation, and operation of high-speed railway bridges for improved safety and ride comfort in engineering practices.

Key Words

arch bridge; CRTS Type I double-block ballastless track; finite element analysis; high-speed railway; thermal deformation; track geometry

Address

Hongye Gou:1)Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China 2)Key Laboratory of High-Speed Railway Engineering of the Ministry of Education, Chengdu, Sichuan 610031, China 3)National Key Laboratory of Bridge Intelligent and Green Construction, Southwest Jiaotong University, Chengdu 611756, Sichuan, China Hairong Ren:Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China Fei Hu:Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China Qianhui Pu:Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China Xuguang Wen:International Joint Key Laboratory of Guangxi China-ASEAN Comprehensive Transportation, Nanning College, Nanning, Guangxi 530000, China Yi Bao:Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology, Hoboken, New Jersey 07030, USA

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