摘要
利用三维有限元法,对七里塘碾压混凝土拱坝进行了施工期的温度场仿真分析。通过几个典型时段拱冠梁截面的温度等值线图和最高温度包络图,以及施工结束时坝体表面的温度等值线图,得出了温度场的分布规律。仿真分析中考虑了温度场的参数敏感性,混凝土绝热温升随龄期的变化、分层浇筑等因素的影响,具有一定的精度,可以为七里塘碾压混凝土拱坝分析混凝土温度应力和抗裂危险性提供依据。
The whole simulation analysis of Qilitang RCC arch dam is done with 3D FEM. Through the temperature contour map and maximum temperature envelope map of arch crown beams in several typical time intervals, as well as the temperature contour map on the surface of the dam at the end of construction, the distribution laws of the temperature field are obtained. The factors, such as parameter sensitivity of the temperature field, changes of adiabatic temperature with ages of the concrete and concrete placing by layer, are considered in the analysis. It has a certain precision and could be the basis of the temperature stress and crack resistance in the analysis of the dam.
出处
《水利与建筑工程学报》
2008年第3期55-57,61,共4页
Journal of Water Resources and Architectural Engineering
关键词
碾压混凝土拱坝
热学参数
温度场
仿真分析
RCC arch dam
thermal parameter
temperature field
simulation analysis
