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Stability Analysis for CWR on the Railway Bridges by Linearized Method  

Choi, Young-Gil (한국철도공사)
Oh, Ju-Won (한남대학교.건설시스템공학과)
Publication Information
Journal of the Korean Society for Railway / v.12, no.4, 2009 , pp. 472-480 More about this Journal
Abstract
The stability analysis for CWR is difficult in the theory itself because both geometric and material nonlinearity should be considered. Also the analysis results are varied according to the loading history. In contrast to the complexity in the theory, the analysis results for CWR on the railway bridges are quite simple and can be predicted because of a small buckling effect and its negligible nonlinearity. In this study, refined nonlinear analysis methods for the stability analysis of CWR on the railway bridges were developed which consider only material nonlinearity beeause the effects of geometric nonlinearity are nominal. In this study, the analysis results can be found within limited number of iterations with idealized linear force-displacement relationship. From the analysis result comparisons, it was found that the stability analysis for CWR on the railway bridges can be performed effectively by this method.
Keywords
CWR(Continuous Welded Rail); Rail-Bridge Interaction; Axial Load; Geometrical Nonlinear;
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