Abstract
The long-wave differential settlement in high-speed railway slab has a great influence on the long-term durability of concrete slab.The differential settlement control standard is strongly needed for preventing the cracks of concrete slab.The effects of the differential settlement of subgrade on the moment and vibration of the slab under the vehicle loads were numerical studied.The differential settlement of subgrade with different settlement chord and amplitude was assumed to be cosine shape.The moments and vibration of the slab at different positions were studied.The allowable tensile strength of the slab considering the tensile stress caused by the moment was determined based on the fatigue strength of the slab.A control standard of the medium to long wave of the differential settlement of the subgrade was presented.
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