Track Support Systems Parameter Study. Ballast and Foundation Materials Research Program.

摘要

A finite element structural analysis model for conventional railway track support systems (CRTSS) has previously been developed. This study includes parameter studies and sensitivity analyses conducted using the structural model to establish the effects of various parameters on the 'instantaneous-elastic'response of CRTSS. The parameters studied are ballast (type and depth), subballast (type and depth),subgrade support conditions,rail size,ties (spacing and width),wheel loading,missing ties and tie type. The parameter study indicates that ballast type and rail size do not significantly effect 'instantaneous-elastic'response of CRTSS,while subballast (stabilized),subgrade support condition and wheel loading are some of the major parameters that affect the 'instantaneous-elastic'response of the CRTSS.