土路基上板式轨道结构受力的有限元分析

Finite Element Analysis on Stresses in Slab Track Structures on Soil Subgrade

为分析土路基上板式轨道结构的受力,建立了有限元分析模型,从应力极值的角度研究了底座尺寸效应.结果表明,底座厚度减小使底座各向应力略微增大,降低基床最大压应力,但对轨道板受力影响很小;底座宽度增加使基床最大压应力明显降低,但对轨道板和底座受力影响甚微.

To analyze the stresses in slab track structures on soil subgrades, a finite element model was derived. The dimensional effects of the reinforced concrete roadbed on the stresses in the track structure was studied. A reduction in the thickness of the reinforced concrete roadbed increases the stresses in it slightly, decreases the maximum compression stresses in the subgrade bed, and has a little influence on the stresses in the slab. An increase in the reinforced concrete roadbed width obviously decreases the maximum stresses in the subgrade bed, but has little effects on the stresses in the slab and roadbed.