拱坝应力分析中的有限元内力法  

The method of finite element internal force for analysis of arch dam stresses

作　　者：李同春[1] 温召旺 

机构地区：[1]河海大学水利水电工程学院,南京210098 [2]深圳市市政工程设计院,深圳518035

出　　处：《水力发电学报》2002年第4期18-24,共7页Journal of Hydroelectric Engineering

摘　　要：本文提出了拱坝应力分析的有限元内力法 ,该法首先按常规方法建立拱坝及地基在水压力、自重等荷载作用下的有限元平衡方程 ,求解结点位移和单元应力 ,然后将坝体分解为拱系和梁系 ,根据拱和梁的内力平衡条件求解指定截面上的约束内力 ,并进而求解相应截面上的内力 (弯矩、轴力、剪力等 )和坝体内任一点的等效应力。文中推导了相应的计算公式 。In this paper, the method of finite element internal force for analysis of arch dam stresses is presented. Based on the routine method, finite element balance equation of dam body and dam foundation under water pressure and body force is established to solve the nodal displacements and element stresses. Based on the condition of internal force balance of arch system and beam system, constraining internal forces of given section are solved by dividing the dam body into arch system and beam system. Further more, internal forces of given section(moment, axial force, shear etc.) and equivalent stresses of dam body any where are to be solved. Calculation formulas are derived, and some simple examples about typical cylindrical arch dam and multiple dome dam which is to be built prove that the method proposed in this paper is right.

关 键 词：水工结构工程 内办法 有限元法 拱坝 

分 类 号：TV642.4[水利工程—水利水电工程]