摘要
为了研究温度对预应力混凝土安全壳结构抗压能力的影响,建立考虑预应力钢束的安全壳结构有限元模型,计算分析了高温作用下安全壳结构的径向位移、应变、预应力以及结构开裂等参数随内压变化情况。结果表明:在相同内压作用下,温度越高安全壳结构的变形越大;当安全壳结构内部温度低于200℃时,安全壳承压能力基本不发生变化,即在此温度范围内温度对安全壳承压能力基本没有影响;当安全壳结构内部温度达到300℃时,安全壳的承压能力较常温情况时下降明显。
Considering prestressed tendons, a finite element model of containment structure was established in this paper. Radial displacement, load strain, prestress change and structure crack of containment were calculated sub- jected to high temperature. The results show that the higher the temperature is at the same pressure inside the con- tainment, the greater the deformation of the containment structure is ; when the temperature is lower than 200 ~C, the pressure capacity of containment basically stays in the original state, that is to say, the temperature basically does not affect the containment capacity of the containment. However, the compressive capacity of containment de- creases significantly at temperature of 300 ℃.
出处
《世界地震工程》
CSCD
北大核心
2017年第3期7-16,共10页
World Earthquake Engineering
基金
国家自然科学基金资助项目(51478168
51378085)
辽宁省自然科学基金指导计划资助项目(201601025)
关键词
核电厂安全壳
高温
承压性能
nuclear power plant containment
high temperature
compressive capacity
