Transient Analysis of Stone Masonry Arch Railway Bridge

T. P. Vijayalekshmi *, Job Thomas**
* Former M.Tech. Student, Department of Civil Engineering, School of Engineering, Cochin University of Science and Technology, Kerala, India
** Associate Professor, Department of Civil Engineering, School of Engineering, Cochin University of Science and Technology, Kerala, India.
Periodicity:December - February'2018
DOI : https://doi.org/10.26634/jste.6.4.13910

Abstract

This paper presents the transient load analysis of an existing stone masonry arch bridge. The bridge is analyzed to study its stress and deformation behavior. Three cases, namely, original bridge subjected to MG (Meter Guage) or BG (Broad Guage) loading, retrofitted bridge subjected to BG loading was analyzed. The analysis indicated that retrofitting is required to launch BG loading in the existing bridge. A retrofitting by concrete jacketing on the pier and intrados of arch was suggested. The adequacy of the suggested retrofitting to carry the increased load due to the gauge up-gradation is evaluated. The finite element analysis is carried out to determine the stress, crown deflection, and spread of the arch. Three dimensional models of the stone masonry arch bridge in its original form and strengthened form are generated in CATIA V5 (Computer Aided Three Dimentional Interactive Application Software). Transient analysis of the bridge is carried out in ANSYS (Analysis System Software). The 3D finite element analysis indicated that the crown deflection in the original structure is more than the limiting value specified in the Arch Bridge Code. The provision of 450 mm thick concrete jacket for the arch was found to be sufficient to mitigate the excessive crown deflection. The strengthening work is progressing in the work site.

Keywords

Finite Element Method, Masonry, Modeling, Structural Analysis, Structural Design

How to Cite this Article?

Vijayalekshmi, T.P. and Thomas, J. (2018). Transient Analysis of Stone Masonry Arch Railway Bridge. i-manager’s Journal on Structural Engineering, 6(4), 8-15. https://doi.org/10.26634/jste.6.4.13910

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