摘要
本文是在作者的研究成果“龙滩碾压混凝土坝的温控研究”和“摸拟碾压混凝土坝成层浇筑过程温度场的解析解［１］［２］的基础上对龙滩碾压混凝土重力坝夏季开工坝段进行仿真计算。研究结果表明，当开工日期在夏季时，基础混凝土热量倒灌现象严重，最高温升和最大水平正应力均发生在靠近基础的常态混凝土浇筑层中。因此，夏季开工坝段的温控重点是基础常态混凝土垫层。坝体温度降低到稳定温度场需要一个很长的时间过程，对于龙滩碾崐压混凝土坝，大约需要４０－１００年左右。
ln this paper , a two-dimensional finite element model is used for simulating the construction processof the Longtan RCC dam and the intial strain method is applied ofr calculating the temperature creep stresses.The analytical results demonstrate that when construction begins in summer the concrete absorbs heat from airand the maximum temperature and maximum stress happen in the conventional concrete of the dam. It isemphasized that the temperature control of conventional concrete is important.The temperature of the innercore of the dam will tend towards the mean annual temperature and it will take 40-100 years.
出处
《红水河》
1997年第1期13-17,28,共6页
Hongshui River
基金
"八五"国家重点科技攻关项目
关键词
碾压混凝土坝
温度应力
仿真计算
水电站
浇筑
RCC dam, temperature stress,temperature control,simulation analysis,Longtan project.
