摘要
采用邓肯-张模型对浇筑式沥青混凝土心墙坝的应力与变形进行有限元计算,得到了浇筑式沥青混凝土心墙的温度和沥青用量对不同坝高情况下心墙工作性态的影响。发现在坝高较低时,心墙温度、沥青用量对心墙工作性态的影响很小;在高坝情况下,心墙温度、沥青用量对心墙位移的影响较小,但对心墙应力极值和应力水平极值的影响则较为明显。另外,通过对不同覆盖层厚度下心墙工作状态的分析,发现当覆盖层厚度较大时,浇筑式沥青混凝土心墙的位移及应力水平极值明显大于碾压式沥青混凝土心墙。
The stress and deformation of pouring asphalt concrete core dam has been calculated by Duncan - chuang model u- sing FEM. The influence of temperature and asphalt content on work behavior of the core wall with different heights has been re- searched. The result shows that the impact of these two factors is not obvious for a low dam. For a high dam, the influence of temperature and asphah content on the displacement of core - wall is slight, while the influence on extreme values of stress and stress level is obvious. The internal stress state of asphalt concrete core wall with different depths of overburden has been calculat- ed, it shows that the depth of the overburden has a great influence on stress state of core wall. When the overburden is deep, the deformation and stress level in pouring asphalt concrete core - wall is greater than that of compacted asphalt concrete core - wall.
出处
《人民长江》
北大核心
2013年第1期82-85,93,共5页
Yangtze River
基金
新疆水利水电工程重点学科资助项目(xjzdxk-2009-10-05)
