고속철도 장경간 아치교량의 장대레일 축력 특성 분석

초록

A Rail-Structure Interaction(RSI) analysis in longitudinal direction is required to investigate the safety of axial force in CWR on a bridge. The RSI analysis on a girder type bridge is used to track engineers, but the RSI analysis on a special type bridge such as arch bridge is not familiar yet and it cause unreasonable result on the safety of CWR. 3D or 2D modelling on a arch bridge is required to get reasonable RSI analysis result, but mostly an equivalent beam model is used to simplify modelling. To adopt the equivalent beam model, the effect factor on the behavior of CWR, the longitudinal displacement, end rotation, and height of neutral axis, etc. should be analogize with original arch bridge. But, normally, an equivalent beam model which analogizing vertical displacement is used for RSI analysis, and it caused unreasonable result. In this study, the comparison on the axial force of CWR was conducted by RSI analysis according to the various model of an arch bridge. And through the comparison result, the most proper model for RSI analysis for investigating CWR behaviour on a arch bridge was suggested.