摘要
简单介绍了将刚体极限平衡法与考虑横缝的拱坝—地基系统有限元静动力分析相结合,将有限元时程分析的计算成果用于刚体极限平衡求解高拱坝坝肩块体抗滑稳定安全系数的基本思路和计算公式,并详细推导了模拟拱坝横缝动态张合效应的动接触力模型基本公式.最后又以两个实际工程为例,在考虑无限地基辐射阻尼作用的条件下,区分有、无横缝两种情况,在有限元静动力分析的基础上,用本文介绍的方法分别进行拱端推力、块体地震力,以及块体动力安全系数的分析,通过这两种工况计算结果的对比,揭示拱坝横缝对坝肩抗震稳定的影响.
In this paper,the rig id body limit equilibrium is combined with the finite element method which is u sed to analyze the static and dynamic response of arch dam and foundation system ,the result of the finite element analysis is used to solve the high arch dam abut-ment dynamic stability,in which the basic formulas of rigid body limit e quilibrium are given.The dynamic contact force model which simu-late the openi ng and closing functions of the arch dam transverse joint is introduced.Finall y,two engineering examples are presented to demonstrate the effect of transver se joints on arch push force,rock body earthquake force and safe factor.The co nclusion on the effects of those joints on abutment seismic stability is given .
出处
《水利水电技术》
CSCD
北大核心
2002年第6期9-13,共5页
Water Resources and Hydropower Engineering
基金
国家"九五"科技攻关项目(96-221-03-02-05).
关键词
动力安全系数
混凝土
拱坝
横缝
坝肩
抗震稳定
arch dam transverse slot
abutment seismic stability
dynamic saf e factor
