作　　者： ; ; ; ;

机构地区： 武汉大学水利水电学院

出　　处： 《岩石力学与工程学报》 2005年第A02期5281-5286,共6页

摘　　要： 采用三维弹粘塑性块体元法与拱梁分载法的耦合分析方法对大花水拱坝的坝体应力和坝肩稳定性进行了分析。耦合分析时,用块体单元离散坝基,将坝体划分为拱梁系统。在拱坝和基础的接触面上,假设拱梁的基础节点固结在块体表面上,根据虚功原理,将拱梁单元刚度矩阵中关于基础节点的位移的刚度系数变换为关于块体位移的刚度系数。将刚度矩阵组装在一起并建立整体平衡方程,求解基础块体元和坝体内部节点的位移,然后计算各自的应力和稳定情况。计算结果表明,该坝坝肩边坡整体是稳定的。 The coupled analysis method of the trial load method and the 3D elasto-viscoplastic block element method is applied to analyze the stress and stability of Dahuashui arch dam. In the analysis, the foundation is divided into block elements, and the arch dam is treated as an arch-cantilever system. On the interface between the dam and foundation, it is assumed that the base nodes of the dam are fixed on the surface of the block elements. So the displacements of the base nodes have relationship with the displacements of the block elements. According to the virtual work theory, the stiff coefficients about the displacements of the base nodes are transformed into the stiff matrix of the block elements. After assembling all stiff matrixes, the total equilibrium equation can be established. Then it can be solved to obtain the displacements of the interior nodes of the arch dam and those of the block elements of the foundation. Then the stress and stability status can be analyzed separately. The calculation results indicate that the dam abutment slope is stable on the whole.

关 键 词： 水利工程 拱坝 坝肩稳定 块体元法 拱梁分载法 耦合分析

领　　域： [水利工程]