基于有限元法的渡槽排架结构性态分析

Structural Behavior Analysis of the Bent Structure of Aqueduct Based on Finite Element Method

针对我国西北寒旱灌区的渡槽基础和排架易在高矿化度地下水侵蚀和冻融交替作用下出现建筑物结构稳定性和整体性态衰退的问题,采用大型数值分析软件ANSYS对受侵蚀前后渡槽排架的结构进行了计算和分析,探索渡槽在不同工况下的应力和变形规律。分析结果表明:在只有竖向荷载的情况下,侵蚀前后渡槽结构变形分布规律基本相同。x向位移最大值均出现在渡槽两端上部区域,y向变形以跨中区域最为明显,z向以渡槽排架的顶部附近变形最为明显。

The large-scale numerical analyze software ANSYS was used to calculate and analyze the aqueduct bent structures before and after the erosion,and the law of stress and deformation were obtained for aqueduct under the different conditions,which aimed at the problem of a large pile of salt were stranded and gathered in land caused by surface irrigation and alternate freezing and thawing,which resulted in erosion and destruction of the building structure and its basic structure. The analysis results show that：the law of deformation distribution of aqueduct structure is basically the same before and after the erosion only under the condition of gravity. The maximum displacement in x appears in the upper area on both ends of the aqueduct. The most obvious deformation area in y is across the central,and the most obvious deformation area in z is near the top of aqueduct bent. The analysis results can provide the theory basis for further research of the bent structure of aqueduct in the irrigation area.