摘要
在缺乏坝体温度监测资料条件下,如何建立位移确定性模型是一个值得探讨的问题。针对运行期混凝土拱坝变形特点,在三维有限元数值分析方法的基础上提出在以气温和水温确定大坝温度边界时校验拱坝温度场的新方法,分别计算其水压和温度位移分量,从而建立混凝土拱坝的位移确定性模型。以东江拱坝为例,建立典型测点位移确定性模型且与实际观测位移资料进行对比,研究结果表明由此建立的位移确定性模型能够有效分离温度、水压以及时效等位移分量,精度且预测效果较好。这为我国大部分缺乏坝体温度监测资料的混凝土拱坝安全监控提供了一个新的思路。
The deterministic model for concrete arch dam displacement is a problem to be studied in the absence of measured temperature data. According to the deformation characteristics of concrete arch dam in the operation period,a new method is proposed to check the dam temperature field when the temperature boundary is determined by air temperature and water temperature. the FEM is applied to determine the water pressure component and temperature component of displacement in concrete arch dams by using the atmospheric temperature and reservoir water temperature as the temperature boundary condition. On this basis,a deterministic displacement monitoring model for concrete arch dam is established. The model is successfully applied to the establishment of the monitoring system for the Dongjiang Arch Dam.
作者
李明军
王均星
LI Ming-jun;WANG Jun-xing(State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University,Wuhan 300072,Hubei.Province,China)
出处
《中国农村水利水电》
北大核心
2019年第1期115-119,126,共6页
China Rural Water and Hydropower
基金
国家自然科学基金资助项目(51379162)
关键词
混凝土拱坝
位移
确定性模型
温度分量
concrete arch dam
displacement
deterministic model
temperature variable
