Study On The Interaction Between Girders And Rails Of Four-line Railroad Cable-stayed Bridges With Large Span Ballastless Track

Due to its excellent performance such as stable,safe and durable,the rails are selected by more and more countries,and they have been widely used in high-speed railway design at home and abroad.Not only on the road,more and more railway bridges have also begun to laid no orbit.However,in addition to the direct effects of various loads,the no-orbital track will be deforming due to the direct effects of various loads,but also causes vertical additional forces and vertical additional displacements due to telescopic and deformed deformation of the bridge itself.Coupled with the large bridge of the cable bridge than the general bridges such as the simplified beam and the continuous beam,the structure itself is large and the structure of the structure is complicated,which leads to the stress of no orbit on the cable bridge than the average bridge type.complex.In order to ensure that the route is smooth and the train operation is safe when the high-speed trains on the large-span cable bridge are driving,the interaction of the large span-free rail cable-cavity bridge is needed.On the basis of absorbing the research results at home and abroad,this article takes the Shanghai-Soviet Lake Railway Covenant Bridge as the research object.Based on the theory of Liang Rail Interaction,the limited meta-software ANSYS establishes a large span rail-free rail-free railway bridge rail.The role model has studied the changes in the interaction of the beam rails on the large span-free rail-free rail-free rail railway bridge.(1)Taking the Shanghai-Soviet Lake Railway Bridge(40+60+260+60+40)as the research target,the transmission characteristics of the main beam and the rail structure and the components of the rail structure have been fully considered.Spring resistance model,the model precisely simulates the resistance of the fastener and the isolation layer.(2)Through the establishment of the establishment of the beam rail interaction model,the large-span cable-stayed bridge is the longitudinal deformation and longitudinal force distribution of the rails under temperature load,train load,braking load,and combined operating conditions.Under the action of each load,multiple operating conditions have been established to simulate different actual conditions.When analyzing the effect of temperature loads,the effects of main beams,main towers,and cable cables on the beam rail are considered.When analyzing the effects of train load and braking load,consider the effects of loading,loading position,and the number of loading lines on the stress and deformation of the rail.(3)Under the analysis of telescopic work conditions,deflection,and braking conditions,the whole bridge laid three factors: small resistance fastening,the vertical stiffness of the edge pier,and the cable rigidity.The effect of force and deformation.From the perspective of security and economy,it is recommended to lay small resistance buckles on large span bridges.