基于三维有限元法的U形渡槽横向内力计算  

Lateral internal force calculation of U-shaped aqueduct based on 3D finite element method

作　　者：郝明辉 杨文剑[2] 晏小峰 单智杰 罗涛[1] Hao Minghui;Yang Wenjian;Yan Xiaofeng;Shan Zhijie;Luo Tao(Sichuan Water Resources and Hydropower Survey,Design and Research Institute Co.,Ltd.,Chengdu 610031,China;College of Water Resources and Hydropower,Sichuan Uniwersity,Chengdu 610065,China)

机构地区：[1]四川省水利水电勘测设计研究院有限公司,四川成都610031 [2]四川大学水利水电学院,四川成都610065

出　　处：《山西建筑》2022年第15期6-8,22,共4页Shanxi Architecture

基　　金：中国博士后科学基金面上资助项目(2019M653402)。

摘　　要：U形渡槽是灌区工程中应用最广泛的交叉建筑物型式,但目前横向内力普遍按超静定的平面曲梁进行计算难以满足大型渡槽设计精度要求。基于四川省亭子口灌区一期工程渡槽设计实践,利用APDL编制了三维有限元U形渡槽内力提取程序,并将有限元计算成果与结构力学法计算成果进行了对比。结果显示采用结构力学法30°-60°范围弯矩方向有误,弯矩和轴力最大值分别为有限元法的1.5倍和0.5倍左右,失真较为严重。利用面映射法提取三维实体单元的内力再进行结构配筋设计能满足有限元法与规范兼容性需求,可以在大型渡槽设计中进行推广。U-shaped aqueduct is the most widely used cross building type in irrigation engineering, but it is difficult to meet the design precision requirements of large aqueduct to calculate the transverse internal force according to the statically indestructed plane curved beam. Based on the aqueduct design practice of the first stage project of Tingzikou irrigation district in Sichuan Province, this paper uses APDL to develop a three-dimensional finite element U-shaped aqueduct internal force extraction program, and compares the results of finite element calculation with those of structural mechanics method. The results show that the bending moment direction of the structural mechanics method is wrong in the range of 30°~60°, and the maximum values of bending moment and axial force are about 1.5 times and 0.5 times that of the finite element method, respectively. Using the surface mapping method to extract the internal force of the three-dimensional solid element and then to design the structural reinforcement can meet the compatibility requirements of the finite element method and the specification, and can be popularized in the design of large aqueduct.

关 键 词：U形渡槽 有限元 内力计算 APDL 

分 类 号：TV314[水利工程—水工结构工程]