摘要
本文基于二滩拱坝坝体监测仪器的温度观测资料,采用有限元法对坝体温度场进行了反馈分析。通过与实测温度值的比较,表明反馈温度值与实测值基本吻合,基本可以反映坝体实际温度场的分布情况,对于深入了解特高拱坝运行期坝体混凝土的实际温度变化具有重要的意义。从反馈温度场可以看出,由于二滩拱坝坝轴线方向接近南北方向,使得冬季时下游坝面温度明显呈现左右岸不对称分布,与规范设计温度荷载有很大差别,值得注意。
A lot of temperature data of Ertan arch dam have been recorded by the monitoring instruments installed within the dam body since its completion in 1998. Based on these measured data, feedback analysis of temperature field of Ertan arch dam is carried out by using the finite element method in this paper. Comparisons with the recorded temperatures show that the feedback temperatures agree well with the measured temperatures and display the actual temperature distribution in the dam body. The feedback analysis shows that the temperature field of the downstream face is nonsymmetric about the center line of arch dam in winter because the axis of dam approximates to the north-south direction. It should be noted that this temperature load is clearly different from the designed temperature load.
出处
《水力发电学报》
EI
CSCD
北大核心
2008年第2期65-70,共6页
Journal of Hydroelectric Engineering
基金
国家自然科学基金委员会和二滩水电开发有限责任公司雅砻江水电开发联合研究基金项目(50539020)
关键词
水工结构
温度场
反馈分析
二滩拱坝
原型观测资料
hydraulic structure
temperature field
feedback analysis
Ertan arch dam
monitoring data
