拱式渡槽结构受力性能三维有限元分析

拱式渡槽具有主拱圈主要承受轴向压力的特点而适于混凝土材料的承压性能,加之其造型美观而成为南水北调中线工程干渠左岸排水渡槽的可选结构形式。采用三维有限元方法,结合南水北调中线工程河北段干渠左岸排水渡槽结构设计,研究分析了各种荷载工况下渡槽主拱、矩形槽身纵墙和纵向大梁及底板等控制截面的应力分布规律,为工程设计提供了计算依据。

Analysis on stressed performance of structure for arched aqueduct with 3-D FEM

The arched aqueduct has the feature of bearing the axial pressure mainly with the main arch ring, it is adaptable to the pressure-bearing performance. Additionally, its configuration is fine, so it is available to be selected for the drainage aqueduct on the left bank of the main channel for the mid-route of the South-to-North Water Transfer Project. The law of the stress distribution of the controlled sections of the main arch ring, the longitudinal wall of the rectangular aqueduct body, the longitudinal beams and the bottom slab under various loading conditions are analyzed with 3D FEM based on the structural design of the drainage aqueduct on the left bank of the main channel within Hebei Province of the project.