Track-Bridge Longitudinal Interaction of Continuous Welded Rails on Arch Bridge

Rong Chen,Ping Wang,Xian-Kui Wei

doi:10.1155/2013/494137

Rong Chen, Ping Wang + Show 1 more

Open Access

https://doi.org/10.1155/2013/494137

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Abstract

Taking arch bridges, including deck, half-through, and through arch bridges (short for DAB, HTAB, and TAB) as examples, mechanics analysis models of longitudinal interaction between continuously welded rails (short for CWRs) and arch bridges are established. Based on the finite element method (FEM), the longitudinal interaction calculation software of CWR on arch bridges has been developed. Focusing on an HTAB, the tension, compression, and deflection conditions are calculated and analyzed. The results show that the mechanics analysis models of three types of arch bridges can truly reflect the real state of the structure; the calculation software can be used for systematic research of the CWR on arch bridge; as for HTAB, temperature difference of arch rib has a small effect on rail tension/compression, and arch bridge can be simplified as a continuous beam for rail tension/compression additional force calculation; in calculation of deflection conditions of HTAB, it is suggested that train loads are arranged on half span and full span and take the direction of load entering bridge into account. Additionally, the deflection additional force variation of CFST basket handle arch bridge is different from that of ordinary bridge.

Highlights

Over the years, continuous welded rail (CWR) was usually laid on common supported beams or continuous beam bridge structure in China [1–4]
This paper focused on the longitudinal interaction of CWR on arch bridge, established an integrated model of track/bridge/pier for CWR on the deck, half-through, and through arch bridges, programmed the longitudinal interaction analysis software of CWR on arch bridge (LIACAB), and used this software to study the longitudinal force and deformation law to provide theoretical guidance for the design of CWR on the arch bridge
The comparison shows that the mechanics analysis models of three types of arch bridges can truly reflect the real state of the structure; the calculation software

Summary

Introduction

Continuous welded rail (CWR) was usually laid on common supported beams or continuous beam bridge structure in China [1–4]. The design and calculation method of CWR on ordinary bridge have been specified in a specification [10] It often requires a separate establishment of the computational model to conduct a special study of CWR on the special bridge structures. It will cost a lot of efforts and slow down design progress, so it is necessary to analyze the mechanical characteristics and establish a common computational model for different special bridge structures. In this way, designer can get the calculation results of longitudinal interaction. This paper focused on the longitudinal interaction of CWR on arch bridge, established an integrated model of track/bridge/pier for CWR on the deck, half-through, and through arch bridges, programmed the longitudinal interaction analysis software of CWR on arch bridge (LIACAB), and used this software to study the longitudinal force and deformation law to provide theoretical guidance for the design of CWR on the arch bridge

Longitudinal Interaction Model

Engineering Case 1

Engineering Case 2

Conclusions