摘要
用有限单元法研究了混凝土线膨胀系数、弹性模量、绝热温升、徐变等主要影响因素对混凝土坝温度应力的影响,并对参数进行了敏感性分析。同时,在混凝土浇筑层厚度和间歇期的共同影响下,探究了坝体温度应力的变化规律,得出了线膨胀系数、弹性模量、绝热温升、徐变度对温度应力的敏感度,得到了温度应力最大值和间歇期的关系式。
The finite element method is used to study the sensitivity of the influence of different factors on thermal stress of concrete dam, including concrete linear expansion coefficient, elastic modulus, adiabatic temperature rise and creep rate. At the same time, the change rule of thermal stress is explored under the combined effect of concrete pouring thickness and intermittent period. Finally, the sensitivity of thermal stress from linear expansion coefficient, elastic modulus, adiabatic temperature rise and creep rate are obtained, and the relation between maximum thermal stress and intermittent period is also got.
出处
《水力发电》
北大核心
2015年第6期77-80,共4页
Water Power
关键词
混凝土坝
温度应力
不确定因素
敏感度
concrete dam
thermal stress
uncertain factor
sensitivity
