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Bridge CRTS Ⅱ type non-ballasted track is currently the more one type of track structure , the line - the bridge - the interaction force pier more complex system . Bridge pier impact Longitudinal Stiffness is an important factor in orbit force , it is necessary to clarify its impact . In the analysis of domestic and non-ballasted track development and characteristics , based on the CRTS Ⅱ type for non-ballasted track, track force and deformation from the point of view of the pier top longitudinal horizontal stiffness control standards were discussed , the relevant norms at home and abroad , proposed three control standards. The first is the temperature of the brake and the joint action force , Welded Rails additional longitudinal force suffered no more than 472.40 kN; second is the consolidation of institutions discontinuity over 8408.40kN; third is made dynamic and temperature of the slab under the force of the relative displacement of less than 1.00 mm. Based on the basic principles of the finite element method , with the general large-scale finite element analysis software ANSYS secondary development of software BCWS, commonly used for simply supported beam, the beam span continuous beam arrangement , to build a bridge pier longitudinal horizontal stiffness of the track impact analysis model , calculate, analyze the pier top horizontal stiffness of the rail longitudinal vertical additional force , slab relative displacement effects , taking into account the number of different spans and cross- impact . The results show that the longitudinal horizontal stiffness pier additional longitudinal force on the rail , slab relative displacement has significantly affected , and with the span increases, this effect will become more significant. Span continuous beam bridge on non-ballasted track structure stress and deformation of this amplification effect is greater than the effect of the number of spans . By comparison, from the track safety and stability , this paper analyzes the various circumstances applicable pier stiffness, combined with economic factors , single- span bridge recommend grew 32m ,3-5 across an associated continuous beam , single span 48m, 3 continuous beam across a joint . Recommends further clarify rail pads on the relative displacement of slab , the control condition more specific.
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