摘要
借助于ANSYS有限元软件,对大型LNG预应力混凝土储罐由泄露引起的温度场和内力分布进行了深入研究计算,分析了超低温对预应力混凝土储罐结构的影响。结果表明:超低温作用下LNG储罐温度分布由内而外呈线性分布,罐壁的温度分布比较均匀;为减少罐壁中由低温引起的拉应力,同时避免裂缝的出现应在混凝土外罐中合理配置预应力钢筋和热保护角等保冷结构。
Temperature and stress profile of LNG prestressed concrete tank due to LNG spill was studied and the effect of cryogenic liquid for prestressed concrete tank structure was analyzed. The result shows that temperature distribution is linear from the inside to the outside of the LNG tank,while it is uniform. In order to reduce the tensile stress and avoid cracks,prestressed bar and thermal corner protection should be allocated in concrete outer tank.
出处
《低温工程》
CAS
CSCD
北大核心
2010年第4期47-52,共6页
Cryogenics
关键词
LNG储罐
预应力混凝土
泄露工况
温度场
热保护角
热-固耦合
LNG tank
prestressed concrete
spill condition
temperature field
thermal corner protec-tion
thermal-solid coupling
