摘要
旨在给面板堆石坝的设计提供有效的技术参数,提出了科学合理的坝体分区以及面板与分缝的结构形式,数值模拟了面板堆石坝三维渗流问题,利用邓肯-张E-B模型,基于有限元分析软件ANSYS提供的二次开发程序,分析了混凝土面板堆石坝竣工期和蓄水期的应力变形.计算结果表明:蓄水期坝体最大横断面最大计算沉降约为147.5cm,约为坝高的1.2%,坝体最大主应力约为2.33 MPa,面板的挠曲变形最大值约为14.88cm,坝体的应力和变形以及面板的变形均较小;岸坡地形对坝体和面板的应力变形有着明显的影响,右岸陡边坡及凸山梁,引起坝体和面板的变形梯度均较其他部位大.运用ANSYS模拟面板堆石坝三维渗流的应力应变合理可行.
In order to provide effective technical parameters for concrete face rockfill dam design, the scientific and reasonable arch partition of the dam and the structure of panel with seam are put forward. Three-dimensional seepage problems of rockfill dam are numerically simulated. Based on the Duncan- Zhang E-B model, the deformation and stress of concrete face rockfill dam in the completion period and impoundment period are analyzed by the secondly developing program of ANSYS. The results indicate. The maximum settlement of the maximum cross-section of the dam body is 147.5 cm in impoundment period which is 1.2% of the dam height, the maximum principal stress of the dam is about 2.33 MPa, the maximum deflection of the panel is about 14.88 cm, and the stress and deformation of the dam body and the deformation of the panel are smaller. The bank slope topography has a significant effect on the deformation and stress of the dam body and the panel, and the steep slope and convex barrier on the right bank cause larger deformation gradient of the dam body and the panel. It is believed that the three dimensional stress and strain of the concrete face rockfill dam seepage, simulated by using ANSYS, is reasonable.
出处
《西安工业大学学报》
CAS
2015年第10期801-806,共6页
Journal of Xi’an Technological University
基金
西安工业大学校长科研基金(XAGDXJJ1317)
关键词
三维有限元
面板堆石坝
变形
邓肯-张E—B模型
3D finite element
concrete face rockfill dam
deformation
Duncan-Zhang E-B model
