基于大型预应力矩形渡槽运营期中的有限仿真分析

Finite Element Simulation Analysis Based on Large Prestressed Rectangular Aqueduct During Operation

大型渡槽是南水北调工程中的关键控制性结构,本文针对沙河矩形渡槽结构体型大、受力复杂等问题,运用ANSYS大型有限元软件,对南水北调中线一期工程总干渠沙河渡槽进行了三维有限元仿真分析。汇总了8种在沙河预应力渡槽工作过程的组合工况,分析各工况在输水作用下应力变形分布规律,并分析了各种单荷载因素对渡槽变形的影响。分析结果表明,沙河渡槽结构合理,满足设计要求。为预应力矩形渡槽运营期的设计和施工提供一定的参考依据。

The large-scale aqueduct is the key control structure in the South-to-North Water Transfer Project.Aiming at the problems of large-scale structure and complex stress of Shahe rectangular aqueduct,the three-dimensional finite element simulation analysis of Shahe aqueduct,the main channel of the middle route of the South-to-North Water Transfer Project,is carried out by using the large-scale finite element software ANSYS.Eight combined working conditions of prestressed aqueduct in Shahe River are summarized,the stress and deformation distribution law of each working condition under the action of water conveyance is analyzed,and the influence of various single load factors on the deformation of aqueduct is analyzed.The results show that the structure of Shahe aqueduct is reasonable and meets the design requirements.It provides a certain reference for the design and construction of prestressed rectangular aqueduct during the operation period.