The Space Force And Deformation Analysis Of The CRTS Ⅰ Slab Ballastless Track On Subgrade

The nation is in a rapid developing period of High-Speed railway, and ballastless track is the main track structure in the High-Speed railway. However, due to the late start, the high-speed railway ballastless track of the nation has not been inspected by long-term operation, and still at a groping stage on the long-term performance of the ballastless track. Therefore, study the space force and deformation of the ballastless track structure under various loads has significant theoretical and practical value on investigate the mechanism of the ballastless track disease and then guide the design and maintenance of the ballastless track. This paper take CRTS Ⅰ slab ballastless track on subgrade as the research object to calculate and analysis the space stress and deformation using ABAQUS finite element analysis software. Completed the following work:1. Created finite element analysis models of the components of the CRTS Ⅰ slab ballastless track on subgrade in ABAQUS/CAE, and get the ballastless track structure analysis model by assembling. Verified the reliability and rationality of the model through the existing research results;2. Realized the complicated space force and deformation calculation of the CRTS Ⅰ slab ballastless track under the combined action of temperature load, uneven settlement load and train load, obtained the distribution of force and deformation of the various components, revealed the force transfer rule of the structure of CRTS I slab ballastless track;3. Calculated and analyzed the influence rule of temperature load, uneven settlement load and train load on the space force and deformation of the CRTS I slab ballastless track, preliminary discussed the disease mechanism of the CRTS I slab ballastless track structure;4. Calculated and analyzed the influence of structural imperfection, such as interlaminar friction and components cracking, on the CRTS I slab ballastless track. In connection with the structural disease, proposed some prevent and improve measures, and provide a reference for the design and maintenance of ballastless track.