用任意加密有限元剖分的方法研究拱坝强度裂缝的产状  

Arbitrarily encrypted finite element gridding method for strength cracking generation analysis of arch dam

作　　者：张雪虎 张社荣[2] 陈祖坪[3] 

机构地区：[1]中交水运规划设计院,北京100007 [2]天津大学,天津300072 [3]首钢工学院,北京100041

出　　处：《水利学报》2001年第9期68-72,80,共6页Journal of Hydraulic Engineering

基　　金：国家自然科学基金资助项目 ( 5 97780 0 2 )

摘　　要：本文建立了强度裂缝产状和应力状态的解析关系 .建立了面相关单元、线 (棱 )相关单元和单元细分的相关级差的概念 ,利用两种任意结点数的三维等参单元和两种任意结点数的二维等参单元的研究结果 ,在相关级差等于 1的约束下 ,建立了任意加密有限元剖分网格的三维随机有限元自适应算法 .应用上述研究结果 ,解决了拱坝强度裂缝产状的精细算法 .本文最后给出了一个算例 。Analytic relationship between occurrence of strength cracking and stress states is esablished and concepts of correlation element at surface, correlation element at line(arris) and correlation step are defined. The self\|adapted 3\|D stochastic method for arbitrarily encrypted finite element gridding under the restriction of correlation step euqal to 1 is developed. On this basis, the explicit description of strength cracking occurrence is resolved. An example is given to demonstrate the application of proposed method to cracking control and reasonable setup of induced joints.

关 键 词：裂缝产状 有限元剖分 自适应算法 诱导缝 拱坝 强度 

分 类 号：TV642.4[水利工程—水利水电工程]