Abstract: Good interlayer interface performance is the key to maintaining the stability of CRTS Ⅱ slab ballastless track structure. In a project, the tangential cohesion parameters of CRTS Ⅱ slab ballastless track structure are generally measured by horizontal push plate test, so as to measure the interlayer interface performance. Horizontal push plate contraction scale and full scale tests of CRTS Ⅱ slab ballastless track structure are carried out to obtain the tangential force-displacement relation curve of the interlayer interface, thus obtaining the parameters of cohesion model. A threedimensional progressive damage analysis model for CRTS Ⅱ slab ballastless track structure is established, the whole process inversion of the horizontal push plate test is carried out, and the reliability of the contraction scale test results is verified by means of simulation and comparative analysis of test results. The results show that the greater the tangential stiffness of the interlayer interface of the track structure, the weaker the interlayer deformation coordination capability; the more significant the non-uniformity of the interface damage, the more likely the stress concentration; the greater the fracture toughness, the less likely the disjoint in the interlayer interface of the track structure.
Keywords: Beijing-Shanghai HSR; CRTS Ⅱ; slab ballastless track; interlayer interface; push plate test; cohesion model; progressive damage
Source: Chinese Railways No.5 2022 Serial No.59
