摘要
对钢板混凝土结构形式安全壳在内压作用下的承载能力进行了有限元计算分析。首先建立了与某核电预应力混凝土安全壳几何尺寸基本一致的钢板混凝土安全壳有限元模型,施加内压进行计算,计算结果表明在设计基准内压的作用下,钢板混凝土内的混凝土发生大面积开裂,钢板混凝土安全壳在内压工况下的承载能力和抵抗变形能力小于预应力混凝土安全壳。然后对钢板混凝土安全壳的适用条件进行了计算分析,计算结果表明当安全壳直径较小或混凝土抗拉强度较高时可以保证混凝土在设计基准内压作用下不开裂,以实现安全壳作为最后一道屏障的包容作用。对钢板混凝土结构应用于核电厂安全壳的相关参数进行了初步的分析,可以为后续不同核电堆型的安全壳的设计提供一些参考。
In this study, the bearing capacity of the single-storey containment in the form of steel plate concrete structure under the action of internal pressure was studied. First, a finite element model of a steel plate concrete containment that is basically consistent with the geometric dimensions of a prestressed containment is established, and the internal pressure is applied for calculation. The calculation results show that under the action of the basic design internal pressure, the concrete in the steel plate concrete cracks in a large area, indicating that the bearing capacity of the steel plate concrete containment under the internal pressure condition is smaller than that of the prestressed concrete containment. Then, the applicable conditions of the steel plate concrete containment are calculated and analyzed by changing the single parameter. The calculation results show that the method, which is reducing the diameter of the containment or increasing the tensile strength of the concrete, can be used to ensure that concrete does not crack under the action of basic design internal pressure. In this study, the relevant parameters of the steel plate concrete structure applied to the nuclear power plant containment were preliminarily analyzed, which can provide some references for the subsequent optimal design of the containment.
作者
刘蒙莎
李荣鹏
姚迪
LIU Mengsha;LI Rongpeng;YAO Di(China Nuclear Power Engineering Co.,Ltd.,Beijing 100840,China)
出处
《建筑结构》
CSCD
北大核心
2022年第S02期1330-1334,共5页
Building Structure
基金
国家重点研发计划资助项目(2020YFB1901403)
关键词
钢板混凝土
安全壳
设计基准内压
混凝土开裂
steel plate concrete
containment
design internal pressure
concrete cracking
