【摘要】 借助有限元数值方法来模拟地道桥结构与土的相互作用,为能真实地描述两者间相互作用,分别对结构和土体工作性态的影响,采用三维实体建模方法模拟在列车荷载和无荷载两种工况下空间范围内地道桥结构与周围土体的位移、应力分布特征。数值模拟结果表明,列车荷载满布情况下,地道结构顶板跨中产生向下最大挠度,而最大拉应力处于顶板跨中内侧和底板跨中内侧。模拟结果为地道桥结构设计提供了可靠的分析依据。更多还原

【Abstract】 In this paper the interaction between underpass and soil across the railway is simulated based on FEM numerical analysis. 3-D solid modeling is applied to the simulation, which describes the interaction influencing the structure and soil. Comparing the analysis results under the two work conditions with or without train load, the distributions of stress and displacement for the structure and soil caused by the train are worked out. The simulating results showed that the maximum displacement is produced in the midspan of structure roof, and maximum tensile stress appears inside the midspan of roof and base.更多还原