高拱坝-坝基系统的三维静力非线性数值分析
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
高拱坝收缩横缝和坝肩节理岩体的结构非线性特性对坝体应力、变形影响显著,是高拱坝分析中的一个重点和难点问题.针对高拱坝的这一特点,本文采用动接触单元模型,开发研制了修正的中心差分时步积分法,运用静力问题动力计算法,对在建的小湾拱坝系统进行了三维静力非线性数值仿真试验,研究了坝体、坝肩结构非线性特性对坝体的影响.通过本文的数值分析可以得出,高拱坝坝体-坝基系统的结构非线性特性对拱坝梁向应力影响显著,增加了坝体的倒悬效果;同时,数值分析进一步说明,在高水位运行期,小湾拱坝-坝基系统整体稳定.
According to the dynamic contact theory, the new model of three dimensional interface element and its numerical algorithm are presented for analyzing transverse joint arch dam and joint dam foundation that is the most difficult problem of high arch dam analysis, aimed at the outstanding issue of the arch dam contraction joint opening and joint rock of the dam foundation, The numerical experiment is being carried out to analyzeing Xiaowan high arch dam system with the 3D-dynamical constraint joint element. The numerical experiment analysis demonstrates that the Xiao wan arch dam system is stabil in the operation.
引文
[1] 陈厚群.高拱坝抗震设计进展[A].国家自然科学基金委员会.高拱坝学术讨论会论文集[C].北京:中国科技出版社,1996.
    [2] DowlingML,HallJF.Nonlinearseismicanalysisofarchdams[J].JournalofEngineeringMechanics,1989,115(4):768-789.
    [3] 张伯艳,陈厚群,杜修力等.拱坝坝肩抗滑稳定性分析[J].水利学报,2000(11):55-59.
    [4] 徐艳杰,张楚汉等.小湾拱坝模拟实际横缝间距的非线性地震反应分析[J].水利学报,2000(11):55-59.
    [5] NingLi.WavePropagationProblemsintheJointedRockMass[M].Xi'an:PressofNorthwestUniversityofTechnology,1993.
    [6] 宋战平,李宁,陈飞熊.小湾非整体拱坝的抗震稳定性数值仿真试验研究[J].水利与建筑工程学报,2003(4):9-13.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心