For the longitudinally coupled baUastless turnout on Leida bridge on Wuhan-Guangzhou passenger dedicated line （PDL） in China, a turnout （cross over）-track slab-bridge deck-pier integrated finite element model was ...For the longitudinally coupled baUastless turnout on Leida bridge on Wuhan-Guangzhou passenger dedicated line （PDL） in China, a turnout （cross over）-track slab-bridge deck-pier integrated finite element model was established, in which two No. 18 jointless turnouts with movable frogs in form of crossover, longitudinally coupled ballastless track, bridges and piers were regarded as one system. Based on this model, the additional forces and displacement regularities of turnouts, track slab, bridges and piers under occasional loading were analyzed, and the effect of occasional loading position was researched. The results show that slab breaking is more influential on the longitudinal force and deformation of the whole system than rail breaking, that slab breaking on one line could deteriorate both the slab force on another line and the forces exerted on the piers and fastener components, and that a great slab force at the left end of the continuous bridge expansion joint should be particularly avoided in design.展开更多
The action between bridge and ballasted jointless turnout on bridge is reversible. To locate the force path between them,the model of a jointless turnout on a 4×32 m continuous beam were calculated and analyzed. ...The action between bridge and ballasted jointless turnout on bridge is reversible. To locate the force path between them,the model of a jointless turnout on a 4×32 m continuous beam were calculated and analyzed. Also analyzed were factors of influence,such as：temperature increment,longitudinal pier stiffness,ballast resistances,and turnout and bridge layouts.展开更多
文摘For the longitudinally coupled baUastless turnout on Leida bridge on Wuhan-Guangzhou passenger dedicated line （PDL） in China, a turnout （cross over）-track slab-bridge deck-pier integrated finite element model was established, in which two No. 18 jointless turnouts with movable frogs in form of crossover, longitudinally coupled ballastless track, bridges and piers were regarded as one system. Based on this model, the additional forces and displacement regularities of turnouts, track slab, bridges and piers under occasional loading were analyzed, and the effect of occasional loading position was researched. The results show that slab breaking is more influential on the longitudinal force and deformation of the whole system than rail breaking, that slab breaking on one line could deteriorate both the slab force on another line and the forces exerted on the piers and fastener components, and that a great slab force at the left end of the continuous bridge expansion joint should be particularly avoided in design.
文摘The action between bridge and ballasted jointless turnout on bridge is reversible. To locate the force path between them,the model of a jointless turnout on a 4×32 m continuous beam were calculated and analyzed. Also analyzed were factors of influence,such as：temperature increment,longitudinal pier stiffness,ballast resistances,and turnout and bridge layouts.
