【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.更多还原

【Abstract】 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.更多还原