Influence of Guardrails on Track–Bridge Interaction with a Longitudinal Resistance Test of the Fastener

The guardrail is an indispensable part of ballasted track structures on bridges. In order to reveal its influence the track–bridge interaction continuous welded rail (CWR), longitudinal resistance model fastener and influential factors are established through tests. By taking a girder bridge (CGB) for railways as example, stock rail-guardrail-sleeper-bridge-pier integrated simulation developed. effects guardrails, installation torque fastener, joint under typical conditions carefully examined. research results indicate that nominal elastic displacement prior sliding approximately grow linearly with growth torque. presence can alleviate in range CGB, but exacerbate near abutment moveable bearings. This fact enables position be considered new control point design CWR Considering changing rules force gap, it recommended torques 40–60 N·m 700–800 N·m, respectively. maximum stiffness piers CGBs evaluated. When pier CGB lower than value, neglected CWR.