| In the recent years, our country begins to construct ballastless track. The problem of Ballastless track's craze increasing arouses people's attention. If the crack is form, especially transfixion crack, will reduce insulated capability and carrying capacity of the Ballastless track. At the same time it also can endanger the Ballastless track safely running.In this paper, the dynamics model of slab track is developed by ANSYS. The model is built using the solid element to simulate the concrete slab and steel. How to control the temperature crack of the slab is studied. The stress distributing of general steel ordinances of slab in different temperature load is calculated. The relation between the rate of steel ordinances of concrete slab and crack width and between steel diameter and crack width is also calculated. What the influence of prestressed steel in prestressed slab on controlling crack is analyzed. The merit of part prestressed concrete slab compare with full prestressed concrete slab.Because some type ballastless track slab is monolayer steel, but our countries mostly is double deck steel. In this paper, the model of monolayer steel ballastless track slab and double deck steel ballastless track slab is developed. In the same steel ordinances and same temperature load the two type slab's stress distributing and transmogrification is compared.Finally, we know configuring steel in concrete component can not prevent crack forming, but it can divide single big crack in concrete without steel to a great deal of imperceptibility crack. It can reduce concrete pull-stress to diminish the width of crack and increase the number of crack and diminish the space between of crack. Ultimately it can resist crack. |
PDF Full Text Request