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应用有限元分析软件Abaqus建立三维有限元模型,比较素混凝土道面和预应力混凝土道面的应力,道面板面层尺寸为10m×5m×0.25m,首先,对预应力混凝土道面与素混凝土道面板体内部应力进行比较;其次,分析预应力混凝土道面的最不利荷载位置,最后,确定最不利荷载位置适应脱空的能力,最终得板边中部位置最大可适应0.25m2的脱空。预应力混凝土道面脱空适应性设计优化参数:以最不利位置板边中部进行模拟,选取纵向筋的配筋间距、横向筋的间距、预应力值大小和预应力筋的配筋位置4个参数进行优化分析,推荐预应力道面适应脱空的最优参数。
The finite element analysis software Abaqus was used to establish the three-dimensional finite element model. Compared with the stress of plain concrete pavement and prestressed concrete pavement, the pavement slab size was 10m × 5m × 0.25m. Firstly, the prestressed concrete pavement and plain concrete Secondly, analyze the most unfavorable load position of prestressed concrete pavement, and finally, determine the most unfavorable load position to adapt to the ability of emptying. Finally, the middle of the plate edge can adapt to the maximum of 0.25m2 voidage. Optimum parameters of adaptive design of void for prestressed concrete pavement: The middle part of the plate in the most unfavorable position is simulated. The length of the vertical ribs, the spacing of the transverse ribs, the size of the prestressing force and the reinforcement positions of the prestressing tendons are selected Parameters optimization analysis, recommended prestressed pavement to adapt to the optimal parameters of the void.