Abstract:
In the present scenario most of railway lines go for long welded rail or continuous
welded rail for higher level of comfort riding, safety and reduced track maintenances and
also reduced total life cycle cost. LWRICWR is more attractive for high speed railway
lines, metro rail networks. Due to interaction between long welded rail track and bridge,
there is a chance of variation in forces due to implementation of welded rail compare to
conventional rail on railway bridges.
Problem in continuing LWR over Railway Bridge has been long debated topic. Through
analysis of the bridges should be made after the conversion to LWR is made regarding
the seismic safety. The analysis has been made with replacement of LWR track on the
bridges. The type of analysis used, in this report confines to response spectrum with the
type of soil condition as soft. However, time history analysis for a given earthquake (chi
chi) has also been done for one of the bridge of 76.2 in span for 32.5 T route. The
analysis results have been presented in the report and it is found that all the bridges are
safe even after the replacement of LWR is done
